ICSE ICSE Class 8 - CISCE Question Bank Solutions

Discuss the occurrence of hydrogen in the universe and on the earth ?

Describe two chemical properties of hydrogen with equations.

Discuss the use of hydrogen as a fuel ?

Fill in the blank:

carbon dioxide is used as a..................... in the extraction of pure metals from their corresponding ores.

Define physical change. Give two examples for the above changes.

A burning candle shows both physical and chemical changes. Explain ?

Classify the following as a physical or a chemical change.

Drying of wet clothes

Classify the following as a physical or a chemical change.

Manufacture of salt from sea water

Classify the following as a physical or a chemical change.

Butter getting rancid

Classify the following as a physical or a chemical change.

Boiling of water

Classify the following as a physical or a chemical change.

Burning of paper

Classify the following as a physical or a chemical change.

Melting of wax

Classify the following as a physical or a chemical change.

Burning of coal

Classify the Following as a Physical Or a Chemical Change.

Formation of Clouds

Classify the Following as a Physical Or a Chemical Change.

Making of a Sugar Solution

Classify the Following as a Physical Or a Chemical change.

Glowing of an Electric Bulb

Classify the Following as a Physical Or a Chemical Change.

Curdling of Milk

Define a chemical change. Give two examples of the above changes.

Fill in the blank.

The process of a liquid changing into a solid is called ________

Fill in the blank.

A change, which alters the composition of a substances, is known as a___________ change.