ICSE ICSE Class 8 - CISCE Question Bank Solutions

Define catenation.

How is gas carbon produced?

Write three chemical properties of carbon.

Draw the diagrams representing the atomic structures of the following: Neon

Give equations for the reactions.

How is hydrogen separated from carbon dioxide and carbon monoxide? 

Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen is a combustible gas.

Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen does not support combustion.

Give a test to differentiate between two gas jars – one containing pure hydrogen and the other hydrogen-air mixture.

With reference to the equation : Cl₂ + H₂S → 2HCl + S pertaining to a redox reaction – select the correct answer.

Chlorine is ______ to HCl.

With reference to the equation : Cl₂ + H₂S → 2HCl + S pertaining to a redox reaction – select the correct answer.

Hydrogen sulphide is ______ to sulphur since the reaction involves ______ of hydrogen.

With reference to the equation : Cl₂ + H₂S → 2HCl + S pertaining to a redox reaction – select the correct answer.

Chlorine acts as an ______ agent.

Give balanced equation for the following conversion:

Water gas to hydrogen – industrially.

Give balanced equation for the following conversion:

Iron [III] oxide to iron – using hydrogen.

Give balanced equation for the following conversion:

Nitrogen to a basic gas – using hydrogen.

Give reason for the following:

The reaction of chlorine with hydrogen sulphide is deemed a redox reaction.

Select the correct options for the following statement:

The gas which has now replaced hydrogen in air balloons is ___.

Match the statements in List I with the appropriate answer in List II.

Name a ‘pure form’ and an,‘impure form’ of water in the natural state.

State what is potable water. Give its qualities or characteristics which make it fit for human consumption.