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Day 502: JEE Mains Chemistry

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

  1. Question 1

    Classification of Elements and Periodicity. Asked once: 27 Jan 2024

    40
    Given below are two statements: Statement (I): The 4f4f and 5f5f - series of elements are placed separately in the Periodic table to preserve the principle of classification. Statement (II) :S-block elements can be found in pure form in nature. In the light of the above statements, choose the most appropriate answer from the options given below:

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  2. Question 2

    Electrochemistry. Asked once: 26 Jun 2022

    35
    The (∂E∂T)P\left( \frac{\partial E}{\partial T} \right)_{P} of different types of half cells are as follows : A B C D
    1×10−42×10−40.1×10−40.2×10−4\begin{matrix} 1 \times10^{- 4} & 2 \times10^{- 4} & 0.1 \times10^{- 4} & 0.2 \times10^{- 4} \end{matrix}
    (Where EE is the electromotive force) Which of the above half cells would be preferred to be used as reference electrode?

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  3. Question 3

    Haloalkanes and Haloarenes. Asked once: 11 Apr 2023

    124
    Which of the following compounds is an example of Freon?

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  4. Question 4

    Hydrocarbons. Asked once: 22 Jan 2025

    108
    RBr⟶(i) Mg, dry ether(ii) H2O2-methylbutaneRBr \underset{\text{(ii) }H_{2}O}{\overset{\text{(i) }Mg,\ \text{dry ether}}{\longrightarrow}} \text{2-methylbutane} The maximum number of RBr producing 2-methylbutane by above sequence of reactions is ________\_\_\_\_\_\_\_\_ (Consider the structural isomers only)

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  5. Question 5

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 4 Apr 2024

    130
    Correct order of stability of carbanion is

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