Chapter Exam

Unit 8: Hydrogen and its Compounds — Online MCQ Test

Q: Which of the following is the most abundant isotope of hydrogen?

Answer: A. Protium — Protium (¹H) is the most abundant isotope of hydrogen and contains one proton and no neutrons.

Q: Hydrogen is placed in the periodic table at which position?

Answer: A. Group 1, Period 1 — Hydrogen is placed in Group 1 and Period 1 because it has one electron like alkali metals, though it also shows some unique properties.

Q: Which of the following is a common use of dihydrogen?

Answer: A. Fuel in rockets — Dihydrogen is used as a rocket fuel because of its very high calorific value and clean combustion.

Q: Why does hydrogen show anomalous behavior compared to alkali metals?

Answer: B. It can lose, gain, or share an electron — Hydrogen can behave like alkali metals by losing one electron, or like halogens by gaining one electron, and can also form covalent bonds.

CHEMISTRY · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board

Practice Unit 8: Hydrogen and its Compounds with a free chapter-wise online MCQ test for Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR CHEMISTRY. This chapter covers: This chapter covers isotopes position in periodic table preparation properties and uses of dihydrogen. Students examine water hardness heavy water structure preparation properties.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 8: Hydrogen and its Compounds — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR CHEMISTRY — Unit 8: Hydrogen and its Compounds, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is the most abundant isotope of hydrogen?

A. Protium ✓
B. Deuterium
C. Tritium
D. Hydronium

Answer: A. Protium
Protium (¹H) is the most abundant isotope of hydrogen and contains one proton and no neutrons.

Hydrogen is placed in the periodic table at which position?

A. Group 1, Period 1 ✓
B. Group 17, Period 2
C. Group 18, Period 1
D. Group 2, Period 1

Answer: A. Group 1, Period 1
Hydrogen is placed in Group 1 and Period 1 because it has one electron like alkali metals, though it also shows some unique properties.

Which of the following is a common use of dihydrogen?

A. Fuel in rockets ✓
B. Making table salt
C. Softening hard water
D. Preparing limestone

Answer: A. Fuel in rockets
Dihydrogen is used as a rocket fuel because of its very high calorific value and clean combustion.

Why does hydrogen show anomalous behavior compared to alkali metals?

A. It has two valence electrons
B. It can lose, gain, or share an electron ✓
C. It is a metal in all its compounds
D. It is always present as an ion in water

Answer: B. It can lose, gain, or share an electron
Hydrogen can behave like alkali metals by losing one electron, or like halogens by gaining one electron, and can also form covalent bonds.

In the Solvay process, what is the role of hydrogen peroxide in bleaching?

A. It acts as a reducing agent and removes color directly
B. It decomposes to give oxygen, which bleaches by oxidation ✓
C. It forms a white precipitate with dyes
D. It neutralizes acids in the colored matter

Answer: B. It decomposes to give oxygen, which bleaches by oxidation
Hydrogen peroxide bleaches by oxidation; it releases oxygen that oxidizes the colored substances to colorless products.

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