ICSE ICSE Class 8 - CISCE Question Bank Solutions

TRUE \ FALSE

Electrolytic refining is a method in which a thin coating of a metal is done over another metal.

TRUE \ FALSE

Evaporation of water is a physical change. True or false ?

TRUE \ FALSE

The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?

TRUE \ FALSE

Positively charged electrode is called the anode. True or false ?

TRUE \ FALSE

Temperature at which a liquid starts boiling is known as the boiling point of that liquid. True or false ?

What are chemical reactions?

What are biocatalysts ?

Choose the correct alternative.

Carbon forms innumerable compounds because

How is precipitate formation in a chemical reaction indicated?

Write true or false

Carbon constitues 0.03% of the earth’s crust.

What are homogenous reactions ?

Define electrolysis.

Name three reducing agents ?

State the term:

The property by which atoms of an element link together to form long chain or ring compounds. 

Is kerosene an electrolyte or a non-electrolyte ?

What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.

Explain the type of reactions on the basis of the direction of reaction.

What are the main causes of water pollution ? How can it be controlled ?

Write a short note on the information derived from a balanced chemical equation.

How is a strong electrolyte different from a weak electrolyte?