MEDIUM
8th ICSE
IMPORTANT
Earn 100

What happens when zinc reacts with dilute hydrochloric acid.
 

Important Questions on Hydrogen

MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Check Point>Q A
What happens when calcium reacts with cold water.
 
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Check Point>Q A
Write some important uses of hydrogen.
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Check Point>Q A
What is hydrogenation of oils?
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Check Point>Q A
Write two reduction reactions of hydrogen.
HARD
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Check Point>Q A
How hydrogen is used for cutting and welding metals?
EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q A
Hydrogen burns in air to form 
EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q A

The process of removing oxygen from a substance is called

MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 7 - Hydrogen>Exercise>Q B
Hydrogen gas is collected by the _____ (upward/downward) displacement of water.