Recent questions tagged neet-2019

The compound that is most difficult to protonate is :

For an ideal solution, the correct option is : (1) $\Delta$mix S = 0 at constant T and P (2) $\Delta$mix V $\neq$ 0 at constant T and P (3) $\Delta$mix H = 0 at constant T and P (4) $\Delta$mix G = 0 at constant T and P

Conjugate base for Brönsted acids H2O and HF are : (1) OH– and H2F+, respectively (2) H3O+ and F–, respectively (3) OH– and F–, respectively (4) H3O+ and H2F+, respectively

Among the following, the narrow spectrum antibiotic is : (1) Penicillin G (2) Ampicillin (3) Amoxycillin (4) Chloramphenicol

Which will make basic buffer? (1) 50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH3COOH (2) 100 mL of 0.1 M CH3COOH + 100 mL of 0.1 M NaOH (3) 100 mL of 0.1 M HCl + 200 mL of 0.1 M NH4OH (4) 100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH

The major product of the following reaction is:

Which of the following species is not stable? (1) [SiF6]2– (2) [GeCl6]2– (3) [Sn(OH)6]2– (4) [SiCl6]2–

Which of the following is an amphoteric hydroxide? (1) Sr(OH)2 (2) Ca(OH)2 (3) Mg(OH)2 (4) Be(OH)2

In which case change in entropy is negative? (1) Evaporation of water (2) Expansion of a gas at constant temperature (3) Sublimation of solid to gas (4) 2H(g) $\to$ H2(g)

The method used to remove temporary hardness of water is : (1) Calgon's method (2) Clark's method (3) Ion-exchange method (4) Synthetic resins method

Which one is malachite from the following? (1) CuFeS2 (2) Cu(OH)2 (3) Fe3O4 (4) CuCO3.Cu(OH)2

The non-essential amino acid among the following is: (1) valine (2) leucine (3) alanine (4) lysine