MEDIUM
8th ICSE
IMPORTANT
Earn 100

Give reason, a pop sound is produced when hydrogen gas is burnt.

Important Questions on Hydrogen

MEDIUM
8th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 8>Chapter 7 - Hydrogen>Exercise>Q 4
Give reason, helium has replaced hydrogen in weather observation balloons.
MEDIUM
8th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 8>Chapter 7 - Hydrogen>Exercise>Q 4
Give reason, nitric acid is not used for the preparation of hydrogen gas.
EASY
8th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 8>Chapter 7 - Hydrogen>Exercise>Q 5
Name the two metals which give hydrogen with cold water.
EASY
8th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 8>Chapter 7 - Hydrogen>Exercise>Q 5
Name a metal which liberates hydrogen only when steam is passed over red-hot metal.
EASY
8th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 8>Chapter 7 - Hydrogen>Exercise>Q 5
Name the process in which oxygen is added or hydrogen is removed.
EASY
8th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 8>Chapter 7 - Hydrogen>Exercise>Q 5
Name a metallic oxide which can be reduced into metal by hydrogen.
MEDIUM
8th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 8>Chapter 7 - Hydrogen>Exercise>Q 6
Name the chemicals required to prepare hydrogen gas in the laboratory.
MEDIUM
8th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 8>Chapter 7 - Hydrogen>Exercise>Q 6
Give a balanced chemical equation for the preparation of hydrogen gas in the laboratory.