MEDIUM
9th ICSE
IMPORTANT
Earn 100

Give the reason for the following:

Zinc granules are used in the laboratory preparation of hydrogen.

Important Questions on Study of the First Elements-Hydrogen

EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(B)>Q 12

Give the reason for the following:

Purified and dry hydrogen is collected over mercury.

EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(B)>Q 12

For laboratory preparation of hydrogen, give the reason for the following:

The end of the thistle funnel should be dipped under acid.

MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(B)>Q 12

Give the reason for the following:

Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.

EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 1
Where does Hydrogen occur in the free state?
EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 1
 How did the name Hydrogen originate?
MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 2
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with a monovalent metal.
MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 2
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with a divalent metal.
MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 6 - Study of the First Elements-Hydrogen>EXERCISE 6(C)>Q 3
Which metal is preferred for collecting hydrogen from cold water?