Class 11 Chemistry Hydrogen Exam Questions

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Study Material for Class 11 Chemistry Chapter 9 Hydrogen

Class 11 Chemistry students should refer to the following Pdf for Chapter 9 Hydrogen in Class 11. These notes and test paper with questions and answers for Class 11 Chemistry will be very useful for exams and help you to score good marks

Class 11 Chemistry Chapter 9 Hydrogen

LEVEL – 1

1.What happens when peroxydisulphuric acid is hydrolysed with water?

Ans: Sulphuric acid and hydrogen peroxide.

 

2. Name the gases produced when water reacts with:

(a) Aluminium nitride

(b) Aluminium carbide

Ans:

(a)ammonia gas is formed

(b) methane is formed

 

3.What is meant by autoprotolysis of water?

Ans: The self oxidation reduction of water.

 

4. Why can’t sea animals live in distilled water?

Ans: Due to the absence of free oxygen in the distilled water.

 

5. Which cations cause hardness in water?

Ans: Calcium and magnesium cations.

 

6. What is meant by Hydrogenation?

Ans: The addition of hydrogen is called hydrogenation.

 

7. What is ‘syn’ gas ?

Ans: Syn is a mixture of CO and H2.

LEVEL – 2

1. How is hydrogen prepared :
(i) From water by using a reducing agent?
(ii) In laboratory in the pure form?
(iii) From hydrocarbon?
Ans: (i) It is usually prepared by the reaction of granulated zinc with dilute hydrochloric acid.
 
 Class 11 Chemistry Redox Reactions Exam Questions-9
 
 
2. How does H2O2 behave as a bleaching agent?
Ans: On decomposition it produces nascent oxygen which decolourises the colour.
 
 
3. Discuss the structure of common form of ice.
Ans: Due to the formation of hydrogen bonding it produce cage like structure.
 
 
4. How is heavy water prepared from normal water?
Ans: Due to continuous electrolysis of water.
 
 
5. Write the chemical reaction to show the amphoteric nature of water.

Class 11 Chemistry Redox Reactions Exam Questions-10

6. What are the advantages of using hydrogen as fuel?
Ans: (i) Produce no pollution. (ii) High calorific value (iii) Produces drinking water.
 
 
7. Name the isotopes of hydrogen. What is the importance of heavier isotopes of hydrogen?
Ans: Deuterium and tritium. The importance of heavier isotopes of hydrogen is in nuclear reactor.
 
 
LEVEL – 3


1. When hydrogen is passed over a black solid compound A , the products are brown metal B and a colourless liquid C .The metal B displaces Silver from Silver nitrate and reacts with dilute hydrochloric acid to give hydrogen.
(i) Name A, B, and C.
(ii) Give the chemical equation involved.

Class 11 Chemistry Redox Reactions Exam Questions-11


2. What do you understand by the terms?
(i) Hydrogenation
(ii) Syn gas
(iii) Water gas-shift reaction
Ans: (i) The addition of hydrogen is called hydrogenation.
(ii) The mixture of CO and H2 is known as syn gas.
 
 
Class 11 Chemistry Redox Reactions Exam Questions-12

 
Chapter 04 Chemical Bonding and Molecular Structure
Class 11 Chemistry Chemical Bonding and Molecular Structure Exam Questions

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CBSE Class 11 Chemistry Chapter 9 Hydrogen Study Material

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CBSE Study Material Chemistry Class 11 Chapter 9 Hydrogen

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