PYQ Vault
EbooksTutor

Day 230: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. Asked once: 10 Apr 2023 (same type asked 5 times) See all 5 of this type

    142
    In alkaline medium, the reduction of permanganate anion involves a gain of ____electrons.

  2. Question 2

    Biomolecules. Asked once: 29 Jul 2022 (same type asked 5 times) See all 5 of this type

    139
    Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Amylose is insoluble in water. Reason R: Amylose is a long linear molecule with more than 200 glucose units. In the light of the above statements, choose the correct answer from the options given below.

    Tap an option to check your answer.

  3. Question 3

    Chemical Bonding and Molecular Structure. Asked once: 4 Apr 2024 (same type asked 5 times) See all 5 of this type

    124
    The correct statement/s about Hydrogen bonding is/are: (A) Hydrogen bonding exists when HH is covalently bonded to the highly electro negative atom. (B) Intermolecular HH bonding is present in o-nitro phenol (C) Intramolecular HH bonding is present in HFHF. (D) The magnitude of HH bonding depends on the physical state of the compound. (E) H-bonding has powerful effect on the structure and properties of compounds. Choose the correct answer from the options given below:

    Tap an option to check your answer.

  4. Question 4

    Coordination Compounds. Asked once: 1 Feb 2024 (same type asked 5 times) See all 5 of this type

    37
    Given below are two statements: Statement (I): A solution of [Ni(H2O)6]2+\left\lbrack Ni\left( H_{2}O \right)_{6} \right\rbrack^{2 +} is green in colour. Statement (II): A solution of [Ni(CN)4]2−\left\lbrack Ni(CN)_{4} \right\rbrack^{2 -} is colourless. In the light of the above statements, choose the most appropriate answer from the options given below:

    Tap an option to check your answer.

  5. Question 5

    Chemical Kinetics. Asked once: 26 Jul 2022 (same type asked 5 times) See all 5 of this type

    58
    For a reaction A→2 B+CA \rightarrow 2\text{ }B + C the half -lives are 100 s100\text{ }s and 50 s50\text{ }s when the concentration of reactant AA is 0.5 and 1.0 mol L−11.0\text{ }mol{\text{ }L}^{- 1} respectively. The order of the reaction is ____\_\_\_\_. (Nearest Integer)