Chapter 8, Hydrogen, is an essential part of e Class 11 Chemistry MCQs,, and here you will find multiple-choice questions (MCQ) with answers based on the CBSE syllabus and the latest curriculum. These MCQs are designed to help students revise the key concepts of the chapter effectively. Practicing these questions enables students to strengthen their understanding, prepare for Class 11 annual exams, and perform well in competitive exams like NEET and JEE.
Class 11 Hydrogen MCQs – Question with Answers
- Which is the most abundant element in the universe?
a) Oxygen
b) Nitrogen
c) Hydrogen
d) Helium
Answer: c) Hydrogen - What is the isotopic form of hydrogen with one neutron?
a) Protium
b) Deuterium
c) Tritium
d) None of these
Answer: b) Deuterium - Which of the following isotopes of hydrogen is radioactive?
a) Protium
b) Deuterium
c) Tritium
d) None
Answer: c) Tritium - What is the chemical formula of water gas?
a) H₂O
b) CO + H₂
c) CO₂ + H₂O
d) CH₄
Answer: b) CO + H₂ - What is the oxidation state of hydrogen in H₂O?
a) 0
b) -1
c) +1
d) +2
Answer: c) +1 - Which metal reacts with water to release hydrogen gas?
a) Gold
b) Copper
c) Sodium
d) Lead
Answer: c) Sodium - Which of the following is a reducing agent?
a) O₂
b) N₂
c) H₂
d) CO₂
Answer: c) H₂ - What is the bond angle in a water molecule (H₂O)?
a) 90°
b) 104.5°
c) 120°
d) 180°
Answer: b) 104.5° - Which of the following is a method for preparing hydrogen gas?
a) Electrolysis of water
b) Heating sodium chloride
c) Reaction of sodium bicarbonate with acid
d) Oxidation of oxygen
Answer: a) Electrolysis of water - What is the name of the process in which hydrogen is combined with nitrogen to form ammonia?
a) Ostwald process
b) Haber process
c) Contact process
d) Solvay process
Answer: b) Haber process - Which compound is called heavy water?
a) H₂O
b) D₂O
c) H₂O₂
d) H₂S
Answer: b) D₂O - Which type of bond exists in a hydrogen molecule (H₂)?
a) Ionic
b) Covalent
c) Metallic
d) Hydrogen
Answer: b) Covalent - Which gas is produced when zinc reacts with dilute hydrochloric acid?
a) Oxygen
b) Hydrogen
c) Nitrogen
d) Carbon dioxide
Answer: b) Hydrogen - What is the hybridization of oxygen in the H₂O molecule?
a) sp
b) sp²
c) sp³
d) None of these
Answer: c) sp³ - What is the industrial use of hydrogen in the oil industry?
a) Cracking of hydrocarbons
b) Production of gasoline
c) Hydrogenation of oils
d) Dehydration of alcohol
Answer: c) Hydrogenation of oils - Which of the following is not a property of hydrogen?
a) It is colorless.
b) It is odorless.
c) It is heavier than air.
d) It is highly flammable.
Answer: c) It is heavier than air. - Which hydride is ionic in nature?
a) LiH
b) NH₃
c) CH₄
d) H₂O
Answer: a) LiH - What is the function of hydrogen in a fuel cell?
a) Oxidizing agent
b) Reducing agent
c) Neutral molecule
d) Catalyst
Answer: b) Reducing agent - Which property of hydrogen makes it a good fuel?
a) High density
b) Low calorific value
c) High energy per gram
d) Easy storage
Answer: c) High energy per gram - What is the product formed when hydrogen burns in air?
a) H₂O
b) CO₂
c) H₂O₂
d) None of these
Answer: a) H₂O
