PYQ Vault

Day 227: JEE Mains Chemistry

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

  1. Question 1

    Solutions. Asked once: 30 Jan 2024 (same type asked 5 times) See all 5 of this type

    137
    The solution from the following with highest depression in freezing point/lowest freezing point is

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  2. Question 2

    The p-Block Elements. Asked once: 29 Jan 2023 (same type asked 5 times) See all 5 of this type

    39
    During the borax bead test with CuSO4CuSO_{4}, a blue green colour of the bead was observed in oxidising flame due to the formation of

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  3. Question 3

    Solutions. Asked once: 24 Jan 2023 (same type asked 5 times) See all 5 of this type

    146
    The total pressure observed by mixing two liquids A and B is 350mmHg350mmHg when their mole fractions are 0.7 and 0.3 respectively. The total pressure become 410mmHg410mmHg if the mole fractions are changed to 0.2 and 0.8 respectively for AA and BB. The vapour pressure of pure AA ____is mm Hg. (Nearest integer) Consider the liquids and solutions behave ideally.
  4. Question 4

    Biomolecules. Asked once: 29 Jan 2023 (same type asked 5 times) See all 5 of this type

    41
    Number of cyclic tripeptides formed with 2 amino acids AA and BB is:

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  5. Question 5

    Chemical Kinetics. Asked once: 29 Jan 2024 (same type asked 5 times) See all 5 of this type

    147
    The half-life of radioisotopic bromine - 82 is 36 hours. The fraction which remains after one day is _____ ×10−2\times10^{- 2}. (Given antilog .2006=1.587.2006 = 1.587 )