EASY
8th ICSE
IMPORTANT
Earn 100

Hydrogen has the lowest density of all gases.

50% studentsanswered this correctly

Important Questions on Hydrogen

MEDIUM
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 7 - Hydrogen>EXERCISES>Q 2
When an electric current is run through the acidified water, gaseous hydrogen produces at the cathode whereas gaseous oxygen produces at the anode. 
 
EASY
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 7 - Hydrogen>EXERCISES>Q 3
Hydrogen is neutral in nature.
EASY
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 7 - Hydrogen>EXERCISES>Q 4
Hydrogen is not found in free state on Earth, except in very trace amounts in some natural and volcanic gases.
MEDIUM
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 7 - Hydrogen>EXERCISES>Q 5
Hydrogen is highly soluble in water.
MEDIUM
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 7 - Hydrogen>EXERCISES>Q 7
The mixture of CO and H2 is known as hydrogen gas.
MEDIUM
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 7 - Hydrogen>EXERCISES>Q 8
When hydrogen gas is allowed to react through molten sulphur taken in a porcelain dish, a gas is evolved which smells like rotten eggs. The gas is hydrogen sulphide.
MEDIUM
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 7 - Hydrogen>EXERCISES>Q 1

Answer the following in one or two words.

 A mixture of CO and H2.

MEDIUM
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 7 - Hydrogen>EXERCISES>Q 3

Answer the following in one or two words.

Process for the synthesis of artificial vanaspati ghee.