Jee Neet QnA - Recent questions
https://jeeneetqna.in/questions
Powered by Question2AnswerIts one year since I created this website and started adding questions/answers
https://jeeneetqna.in/2144/year-since-created-website-started-adding-questions-answers
Its one year since I created this website and started adding questions/answers. Now it's become a community of Jee and Neet aspirants and now we have 1000+ questions 600+ its all happen possible because of your contribution to community.<br />
<br />
Thank you everyone who contributed here to make it possible. And I promise you to that this community should be live as long as you are here.<br />
<br />
- Momin RazaAnnouncementshttps://jeeneetqna.in/2144/year-since-created-website-started-adding-questions-answersThu, 14 Oct 2021 10:23:20 +0000The structures of beryllium chloride in solid state and vapour phase, are :
https://jeeneetqna.in/2138/the-structures-beryllium-chloride-solid-state-vapour-phase
The structures of beryllium chloride in solid state and vapour phase, are :<br />
<br />
(1) Chain in both<br />
<br />
(2) Chain and dimer, respectively<br />
<br />
(3) Linear in both<br />
<br />
(4) Dimer and Linear, respectivelyChemical Bonding and Molecular Structurehttps://jeeneetqna.in/2138/the-structures-beryllium-chloride-solid-state-vapour-phaseTue, 14 Sep 2021 12:43:59 +0000Which one among the following is the correct option for right relationship between CP and CV for one mole of ideal gas ?
https://jeeneetqna.in/2137/following-correct-option-right-relationship-between-ideal
<p>Which one among the following is the correct option for right relationship between C<sub>P</sub> and C<sub>V</sub> for one mole of ideal gas ?</p><p>(1) C<sub>V</sub> = RC<sub>P</sub></p><p>(2) C<sub>P</sub> + C<sub>V</sub> = R</p><p>(3) C<sub>P</sub> - C<sub>V</sub> = R</p><p>(4) C<sub>P</sub> = RC<sub>V</sub></p>Thermodynamicshttps://jeeneetqna.in/2137/following-correct-option-right-relationship-between-idealTue, 14 Sep 2021 12:41:31 +0000The right option for the statement "Tyndall effect is exhibited by", is :
https://jeeneetqna.in/2136/the-right-option-for-the-statement-tyndall-effect-exhibited
The right option for the statement "Tyndall effect is exhibited by", is :<br />
<br />
(1) Urea solution<br />
<br />
(2) NaCl solution<br />
<br />
(3) Glucose solution <br />
<br />
(4) Starch solutionSurface Chemistryhttps://jeeneetqna.in/2136/the-right-option-for-the-statement-tyndall-effect-exhibitedTue, 14 Sep 2021 12:35:14 +0000Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of :
https://jeeneetqna.in/2135/zr-40-and-hf-72-have-similar-atomic-and-ionic-radii-because-of
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of :<br />
<br />
(1) having similar chemical properties<br />
<br />
(2) belonging to same group<br />
<br />
(3) diagonal relationship<br />
<br />
(4) lanthanoid contractiond - and f - Block Elementshttps://jeeneetqna.in/2135/zr-40-and-hf-72-have-similar-atomic-and-ionic-radii-because-ofTue, 14 Sep 2021 12:16:41 +0000Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
https://jeeneetqna.in/2134/option-number-tetrahedral-octahedral-hexagonal-primitive
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :<br />
<br />
(1) 12, 6<br />
<br />
(2) 8, 4<br />
<br />
(3) 6, 12<br />
<br />
(4) 2, 1Solid Statehttps://jeeneetqna.in/2134/option-number-tetrahedral-octahedral-hexagonal-primitiveTue, 14 Sep 2021 12:13:54 +0000A series LCR circuit containing 5.0 H inductor, 80 µF capacitor and 40 Ω resistor is connected to 230 V variable
https://jeeneetqna.in/2133/containing-inductor-capacitor-resistor-connected-variable
A series LCR circuit containing 5.0 H inductor, 80 µF capacitor and 40 Ω resistor is connected to 230 V variable frequency ac source. The angular frequencies of the source at which power transferred to the circuit is half the power at the resonant angular frequency are likely to be:<br />
<br />
(1) 42 rad/s and 58 rad/s<br />
<br />
(2) 25 rad/s and 75 rad/s<br />
<br />
(3) 50 rad/s and 25 rad/s<br />
<br />
(4) 46 rad/s and 54 rad/sElectromagnetic Induction and Alternating Currentshttps://jeeneetqna.in/2133/containing-inductor-capacitor-resistor-connected-variableTue, 14 Sep 2021 12:10:06 +0000A ball of mass 0.15 kg is dropped from a height 10 m, strikes the ground and rebounds to the same height.
https://jeeneetqna.in/2132/ball-dropped-from-height-strikes-ground-rebounds-same-height
<p>A ball of mass 0.15 kg is dropped from a height 10 m, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is (g = 10 m/s<sup>2</sup>) nearly :</p><p>(1) 1.4 kg m/s</p><p>(2) 0 kg m/s</p><p>(3) 4.2 kg m/s</p><p>(4) 2.1 kg m/s.</p>Laws of Motionhttps://jeeneetqna.in/2132/ball-dropped-from-height-strikes-ground-rebounds-same-heightTue, 14 Sep 2021 12:05:07 +0000A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp.
https://jeeneetqna.in/2131/down-transformer-connected-mains-supply-made-operate-lamp
A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?<br />
<br />
(1) 4 A<br />
<br />
(2) 0.2 A<br />
<br />
(3) 0.4 A<br />
<br />
(4) 2 AElectromagnetic Induction and Alternating Currentshttps://jeeneetqna.in/2131/down-transformer-connected-mains-supply-made-operate-lampTue, 14 Sep 2021 12:02:14 +0000Twenty seven drops of same size are charged at 220 V each. They combine to form a bigger drop.
https://jeeneetqna.in/2130/twenty-seven-drops-charged-each-they-combine-form-bigger-drop
Twenty seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.<br />
<br />
(1) 1980 V<br />
<br />
(2) 660 V<br />
<br />
(3) 1320 V<br />
<br />
(4) 1520 VElectrostaticshttps://jeeneetqna.in/2130/twenty-seven-drops-charged-each-they-combine-form-bigger-dropTue, 14 Sep 2021 11:59:09 +0000Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are
https://jeeneetqna.in/2129/water-falls-height-operate-turbine-losses-frictional-force
<p>Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine?</p><p>(g = 10 m/s<sup>2</sup>)</p><p>(1) 7.0 kW</p><p>(2) 10.2 kW</p><p>(3) 8.1 kW</p><p>(4) 12.3 kW</p>Work, Energy and Powerhttps://jeeneetqna.in/2129/water-falls-height-operate-turbine-losses-frictional-forceTue, 14 Sep 2021 11:56:11 +0000A spring is stretched by 5 cm by a force 10 N. The time period of the oscillations when a mass of 2 kg is suspended
https://jeeneetqna.in/2128/spring-stretched-force-period-oscillations-mass-suspended
A spring is stretched by 5 cm by a force 10 N. The time period of the oscillations when a mass of 2 kg is suspended by it is:<br />
<br />
(1) 0.628 s<br />
<br />
(2) 0.0628 s<br />
<br />
(3) 6.28 s<br />
<br />
(4) 3.14 sLaws of Motionhttps://jeeneetqna.in/2128/spring-stretched-force-period-oscillations-mass-suspendedTue, 14 Sep 2021 11:50:21 +0000In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V
https://jeeneetqna.in/2127/potentiometer-circuit-gives-balance-point-length-another
In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the first cell, then at what length of the wire, the balance point occurs ?<br />
<br />
(1) 62 cm<br />
<br />
(2) 60 cm<br />
<br />
(3) 21.6 cm<br />
<br />
(4) 64 cmCurrent Electricityhttps://jeeneetqna.in/2127/potentiometer-circuit-gives-balance-point-length-anotherTue, 14 Sep 2021 11:48:29 +0000If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of
https://jeeneetqna.in/2126/acceleration-fundamental-physical-quantities-dimensions
<p>If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of energy.</p><p>(1) [F] [A<sup>-1</sup>] [T]</p><p>(2) [F] [A] [T]</p><p>(3) [F] [A] [T<sup>2</sup>]</p><p>(4) [F] [A] [T<sup>-1</sup>]</p>Physics and Measurementhttps://jeeneetqna.in/2126/acceleration-fundamental-physical-quantities-dimensionsTue, 14 Sep 2021 11:46:00 +0000The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm
https://jeeneetqna.in/2125/photons-second-average-emitted-monochromatic-wavelength
<p>The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it delivers the power of 3.3 x 10<sup>-3</sup> watt will be: (h=6.6 × 10<sup>-34</sup> Js)</p><p>(1) 10<sup>15</sup></p><p>(2) 10<sup>16</sup></p><p>(3) 10<sup>17</sup></p><p>(4) 10<sup>18</sup></p>Dual Nature of Matter and Radiationhttps://jeeneetqna.in/2125/photons-second-average-emitted-monochromatic-wavelengthTue, 14 Sep 2021 11:42:46 +0000The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor.
https://jeeneetqna.in/2124/concentration-semiconductor-concentration-semiconductor
The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.<br />
<br />
(1) No current will flow in p-type, current will only flow in n-type.<br />
<br />
(2) current in n-type = current in p-type.<br />
<br />
(3) current in p-type > current in n-type.<br />
<br />
(4) current in n-type > current in p-type.Electronic Deviceshttps://jeeneetqna.in/2124/concentration-semiconductor-concentration-semiconductorTue, 14 Sep 2021 11:39:01 +0000A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon
https://jeeneetqna.in/2123/nucleus-number-breaks-fragments-number-binding-energy-nucleon
A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented nuclei is 7.6 MeV while that of fragments is 8.5 MeV. The total gain in the Binding Energy in the process is :<br />
<br />
(1) 216 MeV<br />
<br />
(2) 0.9 MeV<br />
<br />
(3) 9.4 MeV<br />
<br />
(4) 804 MeVAtoms and Nucleihttps://jeeneetqna.in/2123/nucleus-number-breaks-fragments-number-binding-energy-nucleonTue, 14 Sep 2021 11:36:49 +0000The effective resistance of a parallel connection that consists of four wires of equal length
https://jeeneetqna.in/2122/effective-resistance-parallel-connection-consists-length
The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is 0.25 2. What will be the effective resistance if they are connected in series?<br />
<br />
(1) 4 Ω<br />
<br />
(2) 0.25 Ω<br />
<br />
(3) 0.5 Ω<br />
<br />
(4) 1 ΩCurrent Electricityhttps://jeeneetqna.in/2122/effective-resistance-parallel-connection-consists-lengthTue, 14 Sep 2021 11:34:39 +0000A screw gauge gives the following readings when used to measure the diameter of a wire Main scale reading: 0 mm
https://jeeneetqna.in/2121/screw-gauge-gives-following-readings-measure-diameter-reading
A screw gauge gives the following readings when used to measure the diameter of a wire<br />
<br />
Main scale reading: 0 mm<br />
<br />
Circular scale reading: 52 divisions<br />
<br />
Given that 1 mm on main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is :<br />
<br />
(1) 0.052 cm<br />
<br />
(2) 0.52 cm<br />
<br />
(3) 0.026 cm<br />
<br />
(4) 0.26 cmPhysics and Measurementhttps://jeeneetqna.in/2121/screw-gauge-gives-following-readings-measure-diameter-readingTue, 14 Sep 2021 11:27:32 +0000The escape velocity from the Earth's surface is υ. The escape velocity from the surface of another planet having
https://jeeneetqna.in/2120/velocity-earths-surface-velocity-surface-another-planet-having
The escape velocity from the Earth's surface is υ. The escape velocity from the surface of another planet having a radius, four times that of Earth and same mass density is:<br />
<br />
(1) 4 υ<br />
<br />
(2) υ<br />
<br />
(3) 2 υ<br />
<br />
(4) 3 υGravitationhttps://jeeneetqna.in/2120/velocity-earths-surface-velocity-surface-another-planet-havingTue, 14 Sep 2021 11:23:48 +0000A convex lens 'A' of focal length 20 cm and a concave lens 'B' of focal length 5 cm are kept along the same axis
https://jeeneetqna.in/2119/convex-focal-length-concave-focal-length-kept-along-same-axis
A convex lens 'A' of focal length 20 cm and a concave lens 'B' of focal length 5 cm are kept along the same axis with a distance 'd' between them. If a parallel beam of light falling on 'A' leaves 'B' as a parallel beam, then the distance 'd' in cm will be:<br />
<br />
(1) 30<br />
<br />
(2) 25<br />
<br />
(3) 15<br />
<br />
(4) 50Ray Optics and Optical Instrumentshttps://jeeneetqna.in/2119/convex-focal-length-concave-focal-length-kept-along-same-axisTue, 14 Sep 2021 11:21:03 +0000Consider the following statements (A) and (B) and identify the correct answer. (A) A zener diode is connected in reverse
https://jeeneetqna.in/2118/consider-following-statements-identify-correct-connected
<p>Consider the following <strong>statements (A)</strong> and <strong>(B)</strong> and identify the <strong>correct</strong> answer.</p><p><strong>(A)</strong> A zener diode is connected in reverse bias, when used as a voltage regulator.</p><p><strong>(B)</strong> The potential barrier of p-n junction lies between 0.1 V to 0.3 V.</p><p>(1) <strong>(A)</strong> and <strong>(B)</strong> both are correct.</p><p>(2) <strong>(A)</strong> and <strong>(B)</strong> both are incorrect.</p><p>(3) <strong>(A)</strong> is correct and <strong>(B)</strong> is incorrect.</p><p>(4) <strong>(A)</strong> is incorrect but <strong>(B)</strong> is correct.</p>Electrostaticshttps://jeeneetqna.in/2118/consider-following-statements-identify-correct-connectedTue, 14 Sep 2021 11:15:56 +0000A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since:
https://jeeneetqna.in/2117/length-aperture-suited-objective-astronomical-telescope
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since:<br />
<br />
(1) a large aperture contributes to the quality and visibility of the images.<br />
<br />
(2) a large area of the objective ensures better light gathering power.<br />
<br />
(3) a large aperture provides a better resolution.<br />
<br />
(4) all of the above.Ray Optics and Optical Instrumentshttps://jeeneetqna.in/2117/length-aperture-suited-objective-astronomical-telescopeTue, 14 Sep 2021 11:04:50 +0000Polar molecules are the molecules :
https://jeeneetqna.in/2116/polar-molecules-are-the-molecules
Polar molecules are the molecules :<br />
<br />
(1) having zero dipole moment.<br />
<br />
(2) having permanent electric dipole moment.<br />
<br />
(3) acquire a dipole moment only when magnetic field is absent.<br />
<br />
(4) acquire a dipole moment only in the presence of electric field due to displacement of charges.Electrostaticshttps://jeeneetqna.in/2116/polar-molecules-are-the-moleculesTue, 14 Sep 2021 10:59:19 +0000A body is executing simple harmonic motion with a frequency 'n', the frequency of its potential energy is :
https://jeeneetqna.in/2115/executing-harmonic-frequency-frequency-potential-energy
A body is executing simple harmonic motion with a frequency 'n', the frequency of its potential energy is :<br />
<br />
(1) n<br />
<br />
(2) 2n<br />
<br />
(3) 3n<br />
<br />
(4) 4nOscillations and Waveshttps://jeeneetqna.in/2115/executing-harmonic-frequency-frequency-potential-energyTue, 14 Sep 2021 10:50:41 +0000what is average velocity of parti in one complete vibrationcle executing SHM
https://jeeneetqna.in/2098/what-average-velocity-parti-complete-vibrationcle-executing
neet 2019 simple harmonic motionRotational Motionhttps://jeeneetqna.in/2098/what-average-velocity-parti-complete-vibrationcle-executingSat, 28 Aug 2021 09:34:45 +0000Statement 1: Dipole-dipole interactions are the only non-covalent interaction that lead to hydrogen bonding.
https://jeeneetqna.in/2066/statement-interactions-covalent-interaction-hydrogen-bonding
<p><strong>Statement 1:</strong> Dipole-dipole interactions are the only non-covalent interaction that lead to hydrogen bonding.</p><p><strong>Statement 2:</strong> Fluorine is the most electronegative element and hydrogen bonding in HF is symmetrical.</p><p>(a) Both statements are true</p><p>(b) S<sub>1</sub> is true, S<sub>2</sub> is false</p><p>(c) S<sub>1</sub> is false, S<sub>2</sub> is true</p><p>(d) Both are false</p>Chemistryhttps://jeeneetqna.in/2066/statement-interactions-covalent-interaction-hydrogen-bondingMon, 26 Jul 2021 18:40:27 +0000Deficiency of which vitamin helps in delaying blood clotting?
https://jeeneetqna.in/2065/deficiency-of-which-vitamin-helps-delaying-blood-clotting
Deficiency of which vitamin helps in delaying blood clotting?<br />
<br />
(a) Vitamin B<br />
<br />
(b) Vitamin K<br />
<br />
(c) Vitamin C<br />
<br />
(d) Vitamin EChemistryhttps://jeeneetqna.in/2065/deficiency-of-which-vitamin-helps-delaying-blood-clottingMon, 26 Jul 2021 18:34:17 +0000Statement 1: O-nitrophenol is steam volatile due to H- bonding Statement 2: O-nitrophenol has higher
https://jeeneetqna.in/2064/statement-nitrophenol-volatile-bonding-statement-nitrophenol
<p><strong>Statement 1:</strong> O-nitrophenol is steam volatile due to H- bonding</p><p><strong>Statement 2:</strong> O-nitrophenol has higher melting point due to H-Bonding</p><p>(a) Both statements are true</p><p>(b) S<sub>1</sub> is is true, S<sub>2</sub> is false</p><p>(c) S<sub>1</sub> is false, S<sub>2</sub> is true</p><p>(d) Both are false</p>Chemistryhttps://jeeneetqna.in/2064/statement-nitrophenol-volatile-bonding-statement-nitrophenolMon, 26 Jul 2021 18:33:29 +0000Ozone in troposphere prevents us from?
https://jeeneetqna.in/2063/ozone-in-troposphere-prevents-us-from
Ozone in troposphere prevents us from?<br />
<br />
(a) Cause photochemical smog<br />
<br />
(b) Protects from UV radiation<br />
<br />
(c) Protects from X-ray<br />
<br />
(d) Protects from greenhouse effectChemistryhttps://jeeneetqna.in/2063/ozone-in-troposphere-prevents-us-fromMon, 26 Jul 2021 18:31:32 +0000If W = work done, T = Temperature, KB = Boltzmann constant, x = Displacement & W = αβ^2 e x^2/αKBT
https://jeeneetqna.in/2062/work-done-temperature-boltzmann-constant-displacement-kbt
<p>If W = work done, T = Temperature, K<sub>B</sub> = Boltzmann constant, x = Displacement & $W=\alpha\beta^2e^{x^2\over\alpha K_BT}$, then find dimensions of β?</p><p>(a) [M<sup>1</sup>L<sup>2</sup>T<sup>−2</sup>]</p><p>(b) [M<sup>−1</sup>L<sup>2</sup>T<sup>−2</sup>]</p><p>(c) [M<sup>1</sup>L<sup>1</sup>T<sup>−2</sup>]</p><p>(d) None of these</p>Physics and Measurementhttps://jeeneetqna.in/2062/work-done-temperature-boltzmann-constant-displacement-kbtMon, 26 Jul 2021 18:23:05 +0000A travelling wave is given by y = −0.21sin(x+ 3t) where x is in m, t is in seconds, y is in mm.
https://jeeneetqna.in/2061/travelling-wave-given-0-21sin-3t-where-is-in-in-seconds-is-mm
A travelling wave is given by y = −0.21sin(x+ 3t) where x is in m, t is in seconds, y is in mm. (mass per unit length = 0.135 g/cm). Find the tension in the wire.<br />
<br />
(a) T = 0.1215 N<br />
<br />
(b) T = 20 N<br />
<br />
(c) T = 15.35 N<br />
<br />
(d) T = 5 NOscillations and Waveshttps://jeeneetqna.in/2061/travelling-wave-given-0-21sin-3t-where-is-in-in-seconds-is-mmMon, 26 Jul 2021 18:15:49 +0000If the force acting on the body moving in circular motion is proportional to r−3, then the time period
https://jeeneetqna.in/2060/force-acting-body-moving-circular-motion-proportional-period
<p>If the force acting on the body moving in circular motion is proportional to r<sup>−3</sup>, then the time period of its revolution is proportional to</p><p>(a) $1\over r$</p><p>(b) $1\over r^2$</p><p>(c) r<sup>2</sup></p><p>(d) r</p>Oscillations and Waveshttps://jeeneetqna.in/2060/force-acting-body-moving-circular-motion-proportional-periodMon, 26 Jul 2021 18:12:11 +0000Some drops, each of radius ‘r’ coalesce to form a large drop of radius ‘R’. The surface tension is T.
https://jeeneetqna.in/2059/some-drops-radius-coalesce-large-drop-radius-surface-tension
Some drops, each of radius ‘r’ coalesce to form a large drop of radius ‘R’. The surface tension is T. Find the change in surface energy per unit volume.<br />
<br />
(a) $T\left({1\over r}-{1\over R}\right)$<br />
<br />
(b) $3T\left({1\over r}-{1\over R}\right)$<br />
<br />
(c) $3T\left({1\over R}-{1\over r}\right)$<br />
<br />
(d) $T\left({1\over R}-{1\over r}\right)$Properties of Solids and Liquidshttps://jeeneetqna.in/2059/some-drops-radius-coalesce-large-drop-radius-surface-tensionMon, 26 Jul 2021 18:09:14 +0000An AC current is given by i(t) = I1 sin wt + I2 cos wt. Find the rms value of current.
https://jeeneetqna.in/2058/an-ac-current-given-sin-i2-cos-wt-find-the-rms-value-of-current
An AC current is given by $i(t)=I_1\sin wt+I_2\cos wt$. Find the rms value of current.<br />
<br />
(a) $i_{rms}={\sqrt{I_1^2+I_2^2}\over2}$<br />
<br />
(b) $i_{rms}={\sqrt{I_1^2+I_2^2\over2}}$<br />
<br />
(c) $i_{rms}={I_1^2+I_2^2\over2}$<br />
<br />
(d) $i_{rms}=2\left(\sqrt{I_1^2+I_2^2}\right)$Electromagnetic Induction and Alternating Currentshttps://jeeneetqna.in/2058/an-ac-current-given-sin-i2-cos-wt-find-the-rms-value-of-currentMon, 26 Jul 2021 18:04:53 +0000Four solid spheres each of mass m and radius a, have their centers on the vertices of a square whose side is b.
https://jeeneetqna.in/2057/solid-spheres-radius-their-centers-vertices-square-whose-side
Four solid spheres each of mass m and radius a, have their centers on the vertices of a square whose side is b. Find moment of inertia about the given axis?<br />
<br />
(Assume spheres are connected using a light frame)<br />
<br />
(a) $m\left({8a^2\over5}+2b^2\right)$<br />
<br />
(b) $m\left({8a^2\over5}+4b^2\right)$<br />
<br />
(c) $m\left({4a^2\over5}+2b^2\right)$<br />
<br />
(d) $m\left({4a^2\over5}+b^2\right)$Rotational Motionhttps://jeeneetqna.in/2057/solid-spheres-radius-their-centers-vertices-square-whose-sideMon, 26 Jul 2021 14:28:43 +0000Find the significant figure in 50000.020 × 10^-3
https://jeeneetqna.in/2056/find-the-significant-figure-in-50000-020-10-3
<p>Find the significant figure in 50000.020 × 10<sup>-3</sup></p><p>(a) 5</p><p>(b) 6</p><p>(c) 7</p><p>(d) 8</p>Physics and Measurementhttps://jeeneetqna.in/2056/find-the-significant-figure-in-50000-020-10-3Mon, 26 Jul 2021 14:05:15 +0000The system 2x + 3y + 2z = 1, 4x + 6y + 2z = 1, – x + y + 2z = 3 has
https://jeeneetqna.in/2050/the-system-2x-3y-2z-1-4x-6y-2z-1-x-y-2z-3-has
The system 2x + 3y + 2z = 1, 4x + 6y + 2z = 1, – x + y + 2z = 3 has<br />
<br />
(1) unique solution <br />
<br />
(2) no solution <br />
<br />
(3) infinite solution <br />
<br />
(4) none of theseMathematicshttps://jeeneetqna.in/2050/the-system-2x-3y-2z-1-4x-6y-2z-1-x-y-2z-3-hasTue, 20 Jul 2021 17:31:03 +0000If z^2 + αz + β = 0 has one root 1 − 2i, where α, β ∈ R. Find the value of α − β
https://jeeneetqna.in/2049/if-z-2-z-0-has-one-root-1-2i-where-r-find-the-value-of
If $z^2+\alpha z+\beta=0$ has one root $1-2i,$ where $\alpha,\ \beta\in R$. Find the value of $\alpha-\beta$<br />
<br />
(1) 12<br />
<br />
(2) 10<br />
<br />
(3) –7<br />
<br />
(4) 7Complex Numbers and Quadratic Equationshttps://jeeneetqna.in/2049/if-z-2-z-0-has-one-root-1-2i-where-r-find-the-value-ofTue, 20 Jul 2021 17:28:07 +0000Indium is refined by which of the following methods?
https://jeeneetqna.in/2048/indium-is-refined-by-which-of-the-following-methods
Indium is refined by which of the following methods?<br />
<br />
(1) Van-Arkel <br />
<br />
(2) Zone-refining <br />
<br />
(3) Distillation <br />
<br />
(4) LiquationChemistryhttps://jeeneetqna.in/2048/indium-is-refined-by-which-of-the-following-methodsTue, 20 Jul 2021 17:21:15 +0000Which of the following cannot form CO on reaction with H2O?
https://jeeneetqna.in/2047/which-of-the-following-cannot-form-co-on-reaction-with-h2o
<p>Which of the following cannot form CO on reaction with H<sub>2</sub>O?</p><p>(1) CH<sub>4</sub></p><p>(2) C<sub>3</sub>H<sub>8</sub></p><p>(3) CO<sub>2</sub></p><p>(4) C</p>Chemistryhttps://jeeneetqna.in/2047/which-of-the-following-cannot-form-co-on-reaction-with-h2oTue, 20 Jul 2021 17:18:55 +0000Statement - 1: Ni2+ is detected by dimethylglyoxime and NH4OH Statement - 2: Dimethylglyoxime is a neutral
https://jeeneetqna.in/2046/statement-dimethylglyoxime-statement-dimethylglyoxime
<p><strong>Statement - 1:</strong> Ni<sup>2+</sup> is detected by dimethylglyoxime and NH<sub>4</sub>OH</p><p><strong>Statement - 2:</strong> Dimethylglyoxime is a neutral bidentate ligand.</p><p>(1) Both statements are correct</p><p>(2) Both statements are incorrect</p><p>(3) Statement 1 is correct and statement 2 is incorrect</p><p>(4) Statement 1 is incorrect and statement 2 is correct</p>Chemistryhttps://jeeneetqna.in/2046/statement-dimethylglyoxime-statement-dimethylglyoximeTue, 20 Jul 2021 17:17:25 +0000Statement - 1: α-sulphur and β-sulphur are reversibly converted to each other under slow heating
https://jeeneetqna.in/2045/statement-sulphur-sulphur-reversibly-converted-other-heating
<p><strong>Statement - 1:</strong> α-sulphur and β-sulphur are reversibly converted to each other under slow heating</p><p><strong>Statement - 2:</strong> Monoclinic sulphur exists as most stable allotropic form of Sulphur at room temperature.</p><p>(1) Both statements are correct</p><p>(2) Both statements are incorrect</p><p>(3) Statement 1 is correct and statement 2 is incorrect</p><p>(4) Statement 1 is incorrect and statement 2 is correct</p>Chemistryhttps://jeeneetqna.in/2045/statement-sulphur-sulphur-reversibly-converted-other-heatingTue, 20 Jul 2021 17:15:36 +0000In which of the following more than one type of bond length is present
https://jeeneetqna.in/2044/in-which-the-following-more-than-one-type-bond-length-present
<p>In which of the following more than one type of bond length is present</p><p>(1) CF<sub>4</sub></p><p>(2) SiF<sub>4</sub> </p><p>(3) XeF<sub>4</sub> </p><p>(4) SF<sub>4</sub></p>Chemistryhttps://jeeneetqna.in/2044/in-which-the-following-more-than-one-type-bond-length-presentTue, 20 Jul 2021 17:10:01 +0000Correct order of bond dissociation energy of following halogens is
https://jeeneetqna.in/2043/correct-order-bond-dissociation-energy-following-halogens
<p>Correct order of bond dissociation energy of following halogens is</p><p>(1) Cl<sub>2</sub> > Br<sub>2</sub> > F<sub>2</sub> > I<sub>2</sub></p><p>(2) F<sub>2</sub> > Cl<sub>2</sub> > Br<sub>2</sub> > I<sub>2</sub></p><p>(3) Cl<sub>2</sub> > F<sub>2</sub> > Br<sub>2</sub> > I<sub>2</sub></p><p>(4) I<sub>2</sub> > Br<sub>2</sub> > Cl<sub>2</sub> > F<sub>2</sub></p>Chemistryhttps://jeeneetqna.in/2043/correct-order-bond-dissociation-energy-following-halogensTue, 20 Jul 2021 17:08:38 +0000What is composition of German silver?
https://jeeneetqna.in/2042/what-is-composition-of-german-silver
What is composition of German silver?<br />
<br />
(1) Cu Zn Ni<br />
<br />
(2) Ag Ni Cu<br />
<br />
(3) Zn Ni Ag<br />
<br />
(4) Ag Au ZnChemistryhttps://jeeneetqna.in/2042/what-is-composition-of-german-silverTue, 20 Jul 2021 17:06:41 +0000In estimation of halide from sodium fusion extract which compound is used before adding AgNO3?
https://jeeneetqna.in/2041/estimation-halide-sodium-fusion-extract-compound-before-adding
<p>In estimation of halide from sodium fusion extract which compound is used before adding AgNO<sub>3</sub>?</p><p>(1) NH<sub>3</sub></p><p>(2) HCl</p><p>(3) HNO<sub>3</sub></p><p>(4) NaOH</p>Chemistryhttps://jeeneetqna.in/2041/estimation-halide-sodium-fusion-extract-compound-before-addingTue, 20 Jul 2021 17:06:00 +0000Statement – I : Normal rain water pH is 5.6 Statement – II : Acidic rain water pH is less than 5.6
https://jeeneetqna.in/2040/statement-normal-rain-water-statement-acidic-rain-water-than
<p><strong>Statement – I</strong> : Normal rain water pH is 5.6</p><p><strong>Statement – II</strong> : Acidic rain water pH is less than 5.6</p><p>(1) Statement I is true ,Statement II is false</p><p>(2) Statement I is false ,Statement II is true</p><p>(3) Statement I , II both are true</p><p>(4) Statement I , II both are false</p>Chemistryhttps://jeeneetqna.in/2040/statement-normal-rain-water-statement-acidic-rain-water-thanTue, 20 Jul 2021 17:01:35 +0000Hello and welcome to the Jee Neet QnA: A website / forum which is completely managed by you as members of our community.
https://jeeneetqna.in/2033/welcome-website-forum-completely-managed-members-community
<p>Please show your contribution to this forum / community to make this forum a good place for students to start with. As we are seeing, there are more than enough people to run this website at a good pace and help all the students but there is a problem that we are getting 2 thousands of new users daily but out of them only two to three users create their profile and start contributing to the community. and the rest of them are only seeing the questions and reverting back. This is the main problem which we are dealing with right now.</p><p><strong>Show your presence</strong></p><ol><li>create your profile by clicking the user icon at top right corner of your screen and fill your profile details.</li><li>ask a question or give an answer / solution to any question.</li><li>add comments to the questions or answers which have some errors, typos or present in the wrong category or whatever not right.</li><li>and send feedback about your experience throughout our website or provide your suggestion to improve the user experience and anything else you want from this website.</li></ol><div></div><p><strong>Get recognition</strong></p><ol><li>Show your presence</li><li>then you will get points, badges and titles based on your activity as you ask questions, give answers, add comments or like/dislike others questions/answers.</li></ol><div></div><p><strong>Get roles</strong></p><ol><li>Show your presence and get recognition</li><li>then you will get roles as Expert, Editor, Moderator and Administrator based on your points, badges and titles.</li></ol>Announcementshttps://jeeneetqna.in/2033/welcome-website-forum-completely-managed-members-communityMon, 19 Jul 2021 12:38:39 +0000Define the term henpaphrodite.
https://jeeneetqna.in/2024/define-the-term-henpaphrodite
Define the term henpaphrodite. Give one exampleBiodiversity and Conservationhttps://jeeneetqna.in/2024/define-the-term-henpaphroditeSun, 11 Jul 2021 11:25:36 +0000