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Day 110: JEE Mains Chemistry

5 questions. Try each one first, then open its answer.

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. This type asked 2 times: 2021 Paper 11, 2021 Paper 21. This one: 2021 Paper 21 See all 2 of this type

    33
    Given below are two statements: Statement I: Ethyl pent-4-yn-oate on reaction with CH3MgBrCH_{3}MgBr gives a 3∘3^{\circ}-alcohol. Statement II: In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH3MgBrCH_{3}MgBr. In the light of the above statements, choose the most appropriate answer from the options given below:

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  2. Question 2

    Coordination Compounds. This type asked 2 times: 2021 Paper 19, 2021 Paper 20. This one: 2021 Paper 20 See all 2 of this type

    59
    The number of moles of NH3NH_{3}, that must be added to 2 L2\text{ }L of 0.80MAgNO30.80MAgNO_{3} in order to reduce the concentration of Ag+Ag^{+}ions to 5.0×10−8M(Kformation 5.0 \times10^{- 8}M\left( K_{\text{formation~}} \right. for  [Ag(NH3)2]+=1.0×108)\left. \ \left\lbrack Ag\left( NH_{3} \right)_{2} \right\rbrack^{+}= 1.0 \times10^{8} \right) is ____ . (Nearest integer) [Assume no volume change on adding NH3NH_{3} ]

  3. Question 3

    Hydrocarbons. This type asked 2 times: 2021 Paper 4, 2021 Paper 18. This one: 2021 Paper 18 See all 2 of this type

    47
    The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is:

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  4. Question 4

    Coordination Compounds. Asked once: 23 Jan 2026 S2 (same type asked 19 times) See all 19 of this type

    49
    Total number of unpaired electrons present in the central metal atoms/ions of [Ni(CO)4],[NiCl4]2−,[PtCl2(NH3)2],[Ni(CN)4]2−\left\lbrack Ni(CO)_{4} \right\rbrack,\left\lbrack {NiCl}_{4} \right\rbrack^{2 -},\left\lbrack {PtCl}_{2}\left( {NH}_{3} \right)_{2} \right\rbrack,\left\lbrack Ni(CN)_{4} \right\rbrack^{2 -} and [Pt(CN)4]2−\left\lbrack Pt(CN)_{4} \right\rbrack^{2 -} is ____\_\_\_\_ .

  5. Question 5

    Chemical Bonding and Molecular Structure. Asked once: 24 Jan 2026 S1 (same type asked 15 times) See all 15 of this type

    31
    Among the following, the CORRECT combinations are : (A) IF3→{IF}_{3} \rightarrow T-shaped ( sp3 d{sp}^{3}\text{ }d ) (B) IF5→{IF}_{5} \rightarrow Square pyramidal ( sp3 d2{sp}^{3}{\text{ }d}^{2} ) (C) IF7→{IF}_{7} \rightarrow Pentagonal bipyramidal ( sp3 d3{sp}^{3}{\text{ }d}^{3} ) (D) ClO4−→ClO_{4}^{-}\rightarrow Square planar ( sp2 dsp^{2}\text{ }d ) Choose the correct answer from the options given below :

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