PYQ Vault
EbooksTutor

Day 80: JEE Mains Chemistry

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

  1. Question 1

    Equilibrium. Asked 2 times: 26 Jun 2022*, 13 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked

    146
    20 mL20\text{ }mL of 0.1MNaOH0.1MNaOH is added to 50 mL50\text{ }mL of 0.1M0.1M acetic acid solution. The pHpH of the resulting solution is____ ×10−2\times10^{- 2} (Nearest integer) Given: pKa(CH3COOH)=4.76pKa\left( CH_{3}COOH \right)= 4.76
    log⁡2=0.30\log2 = 0.30
    log⁡3=0.48\log3 = 0.48

  2. Question 2

    Organic Chemistry - Some Basic Principles and Techniques. Asked 2 times: 2021 Paper 20*, 13 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked

    141
     0.400 g\ 0.400\text{ }g of an organic compound (X) gave 0.376 g0.376\text{ }g of AgBrAgBr in Carius method for estimation of bromine. % of bromine in the compound (X) is____ (Given: Molar mass AgBr=188 g mol−1Br=80 gAgBr = 188\text{ }g{\text{ }mol}^{- 1}Br = 80\text{ }g mol−1mol^{- 1} )

  3. Question 3

    Biomolecules. Asked 2 times: 27 Jun 2022, 11 Apr 2023 See all 2 times it was asked

    31
    LL-isomer of tetrose X(C4H8O4)X\left( C_{4}H_{8}O_{4} \right) gives positive Schiff's test and has two chiral carbons. On acetylation, 'X' yields triacetate. 'X' also undergoes following reactions. X is

    Tap an option to check your answer.

  4. Question 4

    Coordination Compounds. Asked 2 times: 6 Apr 2023, 11 Apr 2023 See all 2 times it was asked

    138
    The magnetic moment is measured in Bohr Magneton (BM). Spin only magnetic moment of FeFe in [Fe(H2O)6]3+\left\lbrack Fe\left( H_{2}O \right)_{6} \right\rbrack^{3 +} and [Fe(CN)6]3−\left\lbrack Fe(CN)_{6} \right\rbrack^{3 -} complexes respectively is :

    Tap an option to check your answer.

  5. Question 5

    The d- and f-Block Elements. Asked 2 times: 29 Jul 2022, 6 Apr 2023 See all 2 times it was asked

    130
    During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction.

    Tap an option to check your answer.