PYQ Vault
EbooksTutor

Day 238: JEE Mains Chemistry

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

  1. Question 1

    Chemical Kinetics. Asked once: 2021 Paper 17 (same type asked 4 times) See all 4 of this type

    59
    For the first order reaction A→2 B,1A \rightarrow 2\text{ }B,1 mole of reactant A gives 0.2 moles of BB after 100 minutes. The half life of the reaction is ____\_\_\_\_ min. (Round off to the nearest integer). [Use: ln⁡2=0.69,ln⁡10=2.3\ln2 = 0.69,\ln10 = 2.3 Properties of logarithms: ln⁡xy=ylnx\ln x^{y}= ylnx;
     ln⁡(xy)=ln⁡x−ln⁡y]\left. \ \ln\left( \frac{x}{y} \right)= \ln x - \ln y \right\rbrack
    (Round off to the nearest integer)

  2. Question 2

    Alcohols, Phenols and Ethers. Asked once: 8 Apr 2024 (same type asked 4 times) See all 4 of this type

    124
    Which one the following compounds will readily react with dilute NaOHNaOH ?

    Tap an option to check your answer.

  3. Question 3

    Amines. Asked once: 23 Jan 2025 (same type asked 4 times) See all 4 of this type

    48
    Consider the following sequence of reactions to produce major product (A) →(i)Br2,Fe(ii)Sn, HCl                       (iii)NaNO2 HCl 273k(iv)H3PO2   H2O\underset{\begin{array}{r} \left( iii \right)NaNO_{2}\ HCl\ 273k \\ (iv)H_{3}PO_{2\ \ \ }H_{2}O \end{array}}{\overset{\begin{array}{r} \left( i \right)Br_{2,}Fe \\ \left( ii \right)Sn,\ HCl \end{array}}{\rightarrow}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }(A)Major product(A)_{Major\ product} Molar mass of product (A) is ____\_\_\_\_ gmol−1gmol^{- 1}. (Given molar mass in gmol−1gmol^{- 1} of C:12,H:1C:12,H:1, O:16,Br:80, N:14,P:31)O:16,Br:80,\text{ }N:14,P:31)

  4. Question 4

    Biomolecules. Asked once: 8 Apr 2023 (same type asked 4 times) See all 4 of this type

    135
    Match List I with List II.
    List I (Natural amino acid)List II (One letter code)
    (A)Glutamic acid(I)Q
    (B)Glutamine(II)W
    (C)Tyrosine(III)E
    (D)Tryptophan(IV)Y
    Choose the correct answer from the options given below:

    Tap an option to check your answer.

  5. Question 5

    Classification of Elements and Periodicity. Asked once: 28 Jun 2022 (same type asked 4 times) See all 4 of this type

    33
    Element "E" belongs to the period 4 and group 16 of the periodic table. The valence shell electron configuration of the element, which is just above ' EE ' in the group is

    Tap an option to check your answer.