PYQ Vault
EbooksTutor

Day 109: JEE Mains Chemistry

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

  1. Question 1

    Classification of Elements and Periodicity. This type asked 2 times: 2021 Paper 6, 26 Jun 2022. This one: 26 Jun 2022 See all 2 of this type

    123
    Which of the following elements is considered as a metalloid?

    Tap an option to check your answer.

  2. Question 2

    Electrochemistry. This type asked 2 times: 2021 Paper 24, 14 Jun 2022. This one: 14 Jun 2022 See all 2 of this type

    144
    The resistance of conductivity cell containing 0.01MKCl0.01MKCl solution at 298 K298\text{ }K is 1750Ω1750\Omega. If the conductivity of 0.01MKCl0.01MKCl solution at 298 K298\text{ }K is 0.152×10−3 S cm−10.152 \times10^{- 3}\text{ }S{\text{ }cm}^{- 1}, then the cell constant of the conductivity cell is ____×10−3 cm−1\_\_\_\_\times10^{- 3}{\text{ }cm}^{- 1}.

  3. Question 3

    Aldehydes, Ketones and Carboxylic Acids. This type asked 2 times: 2021 Paper 16, 2021 Paper 26. This one: 2021 Paper 26 See all 2 of this type

    31
    2,4-DNP test can be used to identify:

    Tap an option to check your answer.

  4. Question 4

    Chemical Bonding and Molecular Structure. This type asked 2 times: 2021 Paper 10, 2021 Paper 26. This one: 2021 Paper 26 See all 2 of this type

    35
    In C1H2=C2=C3H−C4H3\overset{1}{C}H_{2}=\overset{2}{C}=\overset{3}{C}H -\overset{4}{C}H_{3} molecule, the hybridization of carbon 1,2,31,2,3 and 4 respectively are:

    Tap an option to check your answer.

  5. Question 5

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 2 times: 2021 Paper 20, 2021 Paper 23. This one: 2021 Paper 23 See all 2 of this type

    60
    The transformation occurring in Dumas' method is given below: C2H7 N+(2x+y2)CuO→xCO2+y2H2O+z2 N2+(2x+y2)CuC_{2}H_{7}\text{ }N +\left( 2x +\frac{y}{2} \right)CuO \rightarrow xCO_{2}+\frac{y}{2}H_{2}O +\frac{z}{2}{\text{ }N}_{2}+\left( 2x +\frac{y}{2} \right)Cu The value of yy is . (Integer answer)