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Day 242: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. Asked once: 9 Apr 2024 (same type asked 4 times) See all 4 of this type

    49
    Identify the incorrect statements regarding primary standard of titrimetric analysis (A) It should be purely available in dry form. (B) It should not undergo chemical change in air. (C) It should be hygroscopic and should react with another chemical instantaneously and stoichiometrically. (D) It should be readily soluble in water. (E) KMnO4&NaOHKMnO_{4}\& NaOH can be used as primary standard. Choose the correct answer from the options given below:

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  2. Question 2

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 9 Apr 2024 (same type asked 4 times) See all 4 of this type

    37
    Relative stability of the contributing structures is:

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  3. Question 3

    The p-Block Elements. Asked once: 27 Jan 2024 (same type asked 4 times) See all 4 of this type

    45
    Yellow compound of lead chromate gets dissolved on treatment with hot NaOHNaOH solution. The product of lead formed is a :

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  4. Question 4

    Solutions. Asked once: 24 Jan 2025 (same type asked 4 times) See all 4 of this type

    121
    The observed and normal masses of compound MX2MX_{2} are 65.6 and 164 respectively. The percent degree of ionisation of MX2MX_{2} is _____\_\_\_\_\_ %. (Nearest integer)

  5. Question 5

    Some Basic Concepts of Chemistry. Asked once: 29 Jul 2022 (same type asked 4 times) See all 4 of this type

    141
    'xx' g of molecular oxygen (O2)\left( O_{2} \right) is mixed with 200 g200\text{ }g of neon (Ne)(Ne). The total pressure of the non-reactive mixture of O2O_{2} and NeNe in the cylinder is 25 bar. The partial pressure of NeNe is 20 bar at the same temperature and volume. The value of 'xx' is ____. [Given: Molar mass of O2=32 g mol−1O_{2} = 32\text{ }g{\text{ }mol}^{- 1}. Molar mass of Ne=20 g mol−1Ne = 20\text{ }g{\text{ }mol}^{- 1}]