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Day 328: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. Asked once: 26 Jun 2022 (same type asked 7 times) See all 7 of this type

    150
    The moles of methane required to produce 81 g81\text{ }g of water after complete combustion is ×10−2\times10^{- 2} mol. [nearest integer]

  2. Question 2

    The p-Block Elements. Asked once: 2021 Paper 8 (same type asked 7 times) See all 7 of this type

    36
    The set that represents the pair of neutral oxides of nitrogen is:

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  3. Question 3

    Equilibrium. Asked once: 29 Jan 2023 (same type asked 6 times) See all 6 of this type

    149
    At 298 K298\text{ }K
    N2( g)+3H2( g)⇌2NH3( g),K1=4×105N_{2}(\text{ }g) + 3H_{2}(\text{ }g) \rightleftharpoons 2NH_{3}(\text{ }g),K_{1}= 4 \times10^{5}
    N2( g)+O2( g)⇌2NO(g),K2=1.6×1012N_{2}(\text{ }g) +O_{2}(\text{ }g) \rightleftharpoons 2NO(g),K_{2}= 1.6 \times10^{12}
    H2( g)+12O2( g)⇌H2O(g),K3=1.0×10−13H_{2}(\text{ }g) +\frac{1}{2}O_{2}(\text{ }g) \rightleftharpoons H_{2}O(g),K_{3}= 1.0 \times10^{- 13}
    Based on above equilibria, the equilibrium constant of the reaction, 2NH3( g)+52O2( g)⇌2NO(g)+3H2O(g)2NH_{3}(\text{ }g) +\frac{5}{2}O_{2}(\text{ }g) \rightleftharpoons 2NO(g) + 3H_{2}O(g) is ____×10−33\_\_\_\_ \times10^{- 33} (Nearest integer).

  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 29 Jul 2022 (same type asked 6 times) See all 6 of this type

    31
    Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?

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  5. Question 5

    Some Basic Concepts of Chemistry. Asked once: 5 Apr 2024 (same type asked 6 times) See all 6 of this type

    47
    An organic compound has 42.1%42.1\% carbon, 6.4%6.4\% hydrogen and remainder is oxygen. If its molecular weight is 342 , then its molecular formula is :

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