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

by JeeNeetQnA in Atomic Structure asked Mar 4, 2021 288 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 682 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 685 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 246 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 273 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 103 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 529 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 146 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 64 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 982 views

The gas evolved due to anaerobic degradation of vegetation causes?

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