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Day 426: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. Asked once: 30 Jan 2024

    132
    If a substance ' AA ' dissolves in solution of a mixture of 'B' and ' CC ' with their respective number of moles as nA,nBn_{A},n_{B} and nCn_{C}, mole fraction of CC in the solution is:

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  2. Question 2

    Structure of Atom. Asked once: 2 Apr 2025

    107
    Which of the following statements are true ? (A) The subsidiary quantum number ll describes the shape of the orbital occupied by the electron. (B) is the boundary surface diagram of the 2px2p_{x} orbital. (C) The + and - signs in the wave function of the 2px2p_{x} orbital refer to charge. (D) The wave function of 2px2p_{x} orbital is zero everywhere in the xy plane.

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  3. Question 3

    The d- and f-Block Elements. Asked once: 5 Apr 2024

    142
    The fusion of chromite ore with sodium carbonate in the presence of air leads to the formation of products AA and BB along with the evolution of CO2CO_{2}. The sum of spin-only magnetic moment values of AA and BB is _______ B.M. (Nearest integer) (Given atomic number: C:6,Na:11,O:8C:6,Na:11,O:8, Fe: 26, Cr: 24)

  4. Question 4

    The p-Block Elements. Asked once: 28 Jan 2025

    120
    Identify the inorganic sulphides that are yellow in colour : (A) (NH4)2 S\left( NH_{4} \right)_{2}\text{ }S (B) PbS (C) CuS (D) As2 S3As_{2}{\text{ }S}_{3} (E) As2 S5As_{2}{\text{ }S}_{5} Choose the correct answer from the options given below :

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  5. Question 5

    Alcohols, Phenols and Ethers. Asked once: 23 Jan 2025

    40
    What amount of bromine will be required to convert 2 g of phenol into 2, 4, 6-tribromophenol ? (Given molar mass in gmol−1gmol^{- 1} of C,H,O,BrC,H,O,Br are 12,1,16,8012,1,16,80 respectively)

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