MEDIUM
8th ICSE
IMPORTANT
Earn 100

Hydrogen gas is collected by the (upward/downward) displacement of water.

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Important Questions on Hydrogen

MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q B
Sodium reacts with water to form _____ gas.
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q B
When hydrogen is passed over molten sulphur, _____ (Sulphur dioxide/ Hydrogen sulphide) is produced.
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q C
Give reason for the following:
In laboratory preparation of hydrogen gas, the gas is collected by the downward displacement of water.
 
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q C
Give reason for the following.
When sodium reacts with water, some flames are seen on the surface of water.
 
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q C
Give reason for the following:
Hydrogen is used as a reducing agent.
EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q D

Complete and balance the following equation:

Zn+HCl→ZnCl2+______

EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q D

Complete and balance the following equation:

Mg+___→MgSO4+H2

EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q D

Complete and balance the following equation:

3Fe+4H2O→Fe3O4+____