PYQ Vault
EbooksTutor

Day 390: 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 2026 S2

    26
    The ratio of mass percentage (w/w)(w/w) of C:HC:H in a hydrocarbon is 12:112:1. It has two carbon atoms. The weight (in g ) of CO2( g)CO_{2}(\text{ }g) formed when 3.38 g of this hydrocarbon is completely burnt in oxygen is : (Given : Molar mass in gmol−1C:12,H:1,O:16gmol^{- 1}C:12,H:1,O:16 )

    Tap an option to check your answer.

  2. Question 2

    Structure of Atom. Asked once: 5 Apr 2026 S2

    27
    Which of the following statement(s) is/are true ? (A) If two orbitals have the same value of ( n+ln + l ), the orbital with lower value of nn will have lower energy. (B) Energies of the orbitals in the same subshell increase with increase in atomic number. (C) The size of 2px2p_{x} orbital is less than the size of 3px3p_{x} orbital. (D) Among 5f,6s, 4d, 5p and 5d orbitals, none of the orbitals have 2 radial nodes. Choose the correct answer from the options given below :

    Tap an option to check your answer.

  3. Question 3

    The d- and f-Block Elements. Asked once: 8 Apr 2026 S2

    36
    Given below are two statements for catalytic properties of transition metals : Statement I : First row transition metals which act as catalyst utilise their 3d electrons only for formation of bonds between reactant molecules and atoms on the surface of catalyst. Statement II : There is increase in the concentration of reactants on the surface of catalyst which strengthens the bonds in reacting molecules. In the light of the above statements, choose the correct answer from the option given below :

    Tap an option to check your answer.

  4. Question 4

    The p-Block Elements. Asked once: 6 Apr 2026 S2

    45
    Treatment of a gas ' X ' with a freshly prepared ferrous sulphate solution gives a compound ' Y ' as a brown ring. The compounds X and Y are.

    Tap an option to check your answer.

  5. Question 5

    Alcohols, Phenols and Ethers. Asked once: 6 Apr 2026 S1

    42
    Consider the following sequence of reactions The major product P is :

    Tap an option to check your answer.