Online Chemistry test series questions answers for NEET, IITJEE, Medical preparation | Hydrogen and its Compounds


Chemistry solved Test Series, MCQ practice questions for preparation of NEET, IIT Joint Entrance Examinations, JEE Main and Advanced, Medical and Engineering Entrance Exams, MBBS admission tests, NEST and other competitions.

Hydrogen and its Compounds (Topics / Syllabus):
Position of hydrogen in the periodic table; Discovery, Occurrence, Preparation, Properties and Industrial Applications of Hydrogen; Dihydrogen - Isotopes of hydrogen, Properties, Preparation and Uses of dihydrogen; Heavy Hydrogen or Deuterium; Tritium; Hydrides and their classification; Water - structure of water and ice, properties of water, hard and soft water, Hydrogen Peroxide; Heavy water.   

Chemistry Solutions and Guide : Hydrogen and its Compounds

MCQ Test Series – Practice Questions - Set 3 (Q. No. 21-30)
Question 21: In which property listed below hydrogen does not resemble alkali metals?
a. Nature of oxide
b. Reducing nature
c. Tendency to form cation
d. Presence of one electron in valence shell

Question 22: Heavy water (D2O) freezes at:
a. 00C
b. 3.80C
c. -3.80C
d. 380C

Question 23: H2 gas is liberated when H2O2 reacts with –
a. Acidified KMnO4
b. O3
c. Acidified K2Cr2O7

Question 24: Hydrogen gas behaves as an oxidising agent in its reaction with:
a. Chlorine
b. Potassium
c. Nitrogen
d. Sulphur

Question 25: Pure water can be obtained from sea water by:
a. Centrifugation
b. Plasmolysis
c. Reverse osmosis
d. Sedimentation

Question 26: Volume strength of 500 ml solution containing 3.4 g of H2O2 is –
a. 11.2
b. 6.8
c. 1.12
d. 2.24

Question 27: In basic medium, H2O2 acts as an oxidising agent in its reaction with:
a. Cr2(SO4)3
b. Ag2O
c. K3[Fe(CN)6]
d. K4[Fe(CN)6]

Question 28:Which isotope of hydrogen is radioactive in nature?
a. Protium only
b. Deuterium only
c. Deuterium and tritium
d. Tritium only

Question 29: Among the following, identify the compound which cannot act as both oxidising and reducing agents?
a. H2O2
b. H2
c. SO2
d. Cl2

Question 30: Hydrogen combines with other elements by:
a. Losing an electron
b. Gaining an electron
c. Sharing an electron
d. a, b, c all are correct

India Study Solution - Chemistry Practice Questions
hydrogen and its compounds
Solutions of Chemistry MCQ Test Series MCQ Practice Questions – Set 3 (Q.No. 21 – 30)
Answer 21: (a).

Answer 22: (b) Hint: Freezing point of heavy water is at 3.80C.

Answer 23: (d).

Answer 24: (b) Hint: An oxidising agent is a species which accepts an electron or electrons. Hydrogen accepts an electron from potassium when it forms KH.
H2 + 2K → 2KH (K+H-).

Answer 25: (c).   Answer 26: (d).

Answer 27: (a) Hint: In basic medium, H2O2 oxidises Cr2(SO4)3

2Cr3+ + 10H- + 3H2O2 → 2CrO2-4 + 8H2O
Cr – Oxidation No. = + 3         Cr – Oxidation No. = + 6

Answer 28: (d).   Answer 29: (b).   Answer 30: (d).

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