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Day 460: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 24 Jan 2025

    106
    Which of the following mixing of 1 M base and 1 M acid leads to the largest increase in temperature?

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  2. Question 2

    Classification of Elements and Periodicity. Asked once: 6 Apr 2024

    44
    The electron affinity value are negative for: (A) Be→Be−Be \rightarrow Be^{-} (B) N→N−N \rightarrow N^{-} (C) O→O2−O \rightarrow O^{2 -} (D) Na→Na−Na \rightarrow Na^{-} (E) Al→Al−Al \rightarrow Al^{-} Choose the most appropriate answer from the options given below:

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  3. Question 3

    Coordination Compounds. Asked once: 25 Jun 2022

    37
    White precipitate of AgClAgCl dissolves in aqueous ammonia solution due to formation of :

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  4. Question 4

    Electrochemistry. Asked once: 4 Apr 2024

    133
    Fuel cell, using hydrogen and oxygen as fuels, (A) has been used in spaceship (B) has as efficiency of 40%40\% to produce electricity (C) uses aluminium as catalysts (D) is eco-friendly (E) is actually a type of Galvanic cell only

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  5. Question 5

    Equilibrium. Asked once: 10 Apr 2023

    141
    A(g)⇌2 B( g)+C(g)A(g) \rightleftharpoons 2\text{ }B(\text{ }g) + C(g) For the given reaction, if the initial pressure is 450 mmHgmmHg and the pressure at time tt is 720 mmHg720\text{ }mmHg at a constant temperature TT and constant volume VV. The fraction of A(g)A(g) decomposed under these conditions is x×10−1x \times10^{- 1}. The value of xx is ___(nearest integer)