PYQ Vault
EbooksTutor

Day 70: JEE Mains Chemistry

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

  1. Question 1

    Classification of Elements and Periodicity. This type asked 3 times: 25 Jun 2022, 1 Feb 2023, 15 Apr 2023. This one: 15 Apr 2023 See all 3 of this type

    55
    The total number of isoelectronic species from the given set is_______
    O2−,F−,Al,Mg2+,Na+,O+,Mg,Al3+,FO^{2 -},F^{-},Al,Mg^{2 +},Na^{+},O^{+},Mg,Al^{3 +},F

  2. Question 2

    The p-Block Elements. This type asked 3 times: 27 Jul 2022, 8 Apr 2023, 15 Apr 2023. This one: 15 Apr 2023 See all 3 of this type

    37
    The number of P−O−PP - O - P bonds in H4P2O7H_{4}P_{2}O_{7}, (HPO3)3\left( HPO_{3} \right)_{3} and P4O10P_{4}O_{10} are respectively.

    Tap an option to check your answer.

  3. Question 3

    Some Basic Concepts of Chemistry. This type asked 3 times: 2021 Paper 25, 27 Jul 2022, 13 Apr 2023. This one: 13 Apr 2023 See all 3 of this type

    57
    A certain quantity of real gas occupies a volume of 0.15dm30.15dm^{3} at 100 atm100\text{ }atm and 500 K500\text{ }K when its compressibility factor is 1.07. Its volume at 300 atm300\text{ }atm and 300 K300\text{ }K (When its compressibility factor is 1.4) is ×_______10−4dm3\times \_\_\_\_\_\_\_10^{- 4}dm^{3} (Nearest integer)

  4. Question 4

    Structure of Atom. This type asked 3 times: 25 Jun 2022, 28 Jun 2022, 12 Apr 2023. This one: 12 Apr 2023 See all 3 of this type

    60
    Values of work function (W0)\left( W_{0} \right) for a few metals are given below:
    MetalLiNaKMgCuAg
    W0/eVW_{0}/\mathrm{eV}2.422.32.253.74.84.3
    The number of metals which will show photoelectric effect when light of wavelength 400 nm400\text{ }nm falls on it is__ Given: h=6.6×10−34 J sh = 6.6 \times10^{- 34}\text{ }J\text{ }s
    c=3×108 m s−1c = 3 \times10^{8}\text{ }m{\text{ }s}^{- 1}
    e=1.6×10−19Ce = 1.6 \times10^{- 19}C

  5. Question 5

    Some Basic Concepts of Chemistry. This type asked 3 times: 25 Jun 2022, 25 Jul 2022, 10 Apr 2023. This one: 10 Apr 2023 See all 3 of this type

    59
    At constant temperature a gas is at a pressure of 940.3 mmHg940.3\text{ }mmHg. The pressure at which its volume decreases by 40%40\% is ___mm Hg. (Nearest Integer)