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Day 394: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. Asked once: 2 Apr 2025

    48
    0.1 mol of the following given antiviral compound (P) will weigh____ ×10−1 g\times 10^{- 1}\text{ }g (Given : molar mass in gmol−1H:1,C:12, N:14g{mol}^{- 1}H:1,C:12,\text{ }N:14, O:16, F:19,I:127)O:16,\text{ }F:19,I:127)

  2. Question 2

    Structure of Atom. Asked once: 5 Apr 2026 S1

    28
    Identify the correct statements from the following : (A) Heisenberg uncertainty principle is applicable to electron. (B) The size of 2px2p_{x} orbital is less than the size of 3px3p_{x} orbital. (C) The energy of 2s orbital of H atom is equal to the energy of 2s orbital of Li. (D) The electronic configuration of Cr is [Ar]3 d54 s1\lbrack Ar\rbrack 3{\text{ }d}^{5}4{\text{ }s}^{1} Choose the correct answer from the options given below:

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  3. Question 3

    The d- and f-Block Elements. Asked once: 5 Apr 2026 S1

    35
    Which of the following is NOT a physical or chemical characteristics of interstitial compounds?

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  4. Question 4

    The p-Block Elements. Asked once: 28 Jan 2026 S2

    27
    Given below are two statements : Statement I : The increasing order of boiling point of hydrogen halides is HCl<HBr<HI<HFHCl < HBr < HI < HF. Statement II : The increasing order of melting point of hydrogen halides is HCl<HBr<HF<HIHCl < HBr < HF < HI. In the light of the above statements, choose the correct answer from the options given below :

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  5. Question 5

    Alcohols, Phenols and Ethers. Asked once: 5 Apr 2026 S1

    42
    Consider compounds A,BA,B and C with following structural formulae
    A=CH3−CH2−CH2−CH2−CH2−OHB=CH2=CH−CH2−CH2−CH3C=HO−CH2−CH2−CH(OH)−CH3\begin{gathered}A =CH_{3}-CH_{2}-CH_{2}-CH_{2}-CH_{2}- OH \\ B =CH_{2}= CH -CH_{2}-CH_{2}-CH_{3} \\ C = HO -CH_{2}-CH_{2}- CH(OH) -CH_{3}\end{gathered}
    For the conversion of B from A , reagent (D) required is ____\_\_\_\_ and structural formula of product (E) obtained when C undergoes same reaction using excess reagent (D) is ____\_\_\_\_

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