Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202124 Feb 2021Evening ShiftChemistryHydrogenActual

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere. Reason R: Hydrogen is the lightest element. In the light of the above statements, choose the correct answer from the options given below:

Options

  1. ABoth A and R are true but R is NOT the correct explanation of A
  2. BBoth A and R are true and R is the correct explanation of A
  3. CA is true but R is false
  4. DA is false but R true

Correct answer

B. Both A and R are true and R is the correct explanation of A

Step-by-step solution

Most abundant gas in the atmosphere is hydrogen. It is the primary gas present in the stars. Hydrogen fuses to Helium and it fuels the stars.

Practice Hydrogen on Quantrex Academy →

More from Hydrogen

The mass of iron converted into Fe₃O₄ by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1 , 16 and 56 g mol ⁻¹ respectively) Assume iron is present in exce 2026During water-gas shift reaction 2023Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Isotopes of hydrogen have almost same chemical properties, but d 2023Given below are two statements: Statement I: Permutit process is more efficient compared to the synthetic resin method for the softening of water. Statement II: Synthetic resin met 2023Match List I with List II List I Type of Hydride List II Example A Electron deficient hydride I MgH 2 B Electron rich hydride II HF C Electron precise hydride III B 2 H 6 D Saline 2023Which hydride among the following is less stable? 2023Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Physical properties of isotopes of hydrogen are different. Reas 2023Given below are two reactions, involved in the commercial production of dihydrogen H 2 . The two reactions are carried out at temperature “ T 1 ” and “ T 2 &rdquo 2023 Full Hydrogen list All JEE Main PYQs