Recent questions asked in jee main 2021 (24 feb shift 1)

by JeeNeetQnA in Atomic Structure asked Mar 4, 2021 250 views

Mass of Li3+ is 8.33 times mass of proton Li3+ and proton are accelerated through same potential difference.

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by JeeNeetQnA in Some Basic Concepts of Chemistry asked Mar 4, 2021 509 views

4.5 gm of solute having molar mass of 90 gm/mol is dissolved in water to make 250 ml solution. Calculate molarity

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by JeeNeetQnA in s - Block Elements (Alkali and Alkaline Earth Metals) asked Mar 4, 2021 581 views

Among the following compounds how many are amphoteric in nature Be(OH)2, BeO, Ba(OH)2, Sr(OH)2

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by JeeNeetQnA in Coordination Compounds asked Mar 4, 2021 150 views

What is the coordination number in Body centred cubic (BCC) arrangement of identical particles

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by JeeNeetQnA in General Principles and Processes of Isolation of Elements asked Mar 4, 2021 215 views

Composition of gun metal is

Composition of gun metal is (1) Cu, Zn, Sn (2) Al, Mg, Mn, Cu (3) Cu, Ni, Fe (4) Cu, Sn, Fe

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by JeeNeetQnA in Redox Reactions asked Mar 4, 2021 73 views

(1) I2 + H2O2 + 2OH− ⟶ 2I− + 2H2O + O2 (2) H2O2 + HOCl ⟶ Cl− + H3O+ + O2

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by JeeNeetQnA in Chemistry asked Mar 4, 2021 448 views

S-1: Colourless cupric metaborate is converted into cuprous metaborate in luminous flame. S-2: Cuprous metaborate

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by JeeNeetQnA in General Principles and Processes of Isolation of Elements asked Mar 4, 2021 127 views

Which of the following ores are concentrated by cyanide of group Ist element.

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by JeeNeetQnA in Coordination Compounds asked Mar 4, 2021 53 views

Which of the following have both the compound isostructural.

Which of the following have both the compound isostructural. (A) TiCl4, SiCl4 (B) SO42-, CrO42- (C) NH3, NO3– (D) ClF3, BCl3 (1) A,B (2) A,C (3) B,C (4) A,D

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by JeeNeetQnA in Environmental Chemistry asked Mar 4, 2021 882 views

The gas evolved due to anaerobic degradation of vegetation causes?

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by JeeNeetQnA in Biomolecules asked Mar 4, 2021 177 views

Which force is responsible for the stacking of α-helix structure of protein?

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by JeeNeetQnA in Sets, Relations and Functions asked Mar 2, 2021 293 views

Let f(x) = 4x3 − 3x2 / 6 − 2 sin x + (2x−1) cos x then f(x)

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