ICSE ICSE Class 8 - CISCE Question Bank Solutions

Certain thermal decomposition reaction, resulting in the formation of the oxide. Give a balanced equation for the thermal decomposition of the following, which result in the formation of metallic oxide.

Calcium nitrate
\[\ce{2Ca[NO3]2->[\Delta]2CaO + 4NO2 + O2}\]

Certain thermal decomposition reaction, resulting in the formation of the oxide. Give a balanced equation for the thermal decomposition of the following, which result in the formation of metallic oxide.

Calcium hydroxide
\[\ce{Ca[OH]2->[\Delta]CaO + H2O}\]

State the meaning of the term ‘oxide’.

Give a balanced equation for the formation of the following oxide –

Sulphur dioxide from a non-metal

Give a balanced equation for the formation of the following oxide –

Zinc oxide from a metal

Give a balanced equation for the formation of the following oxide –

Lead oxide from a mixed Oxide.

Give the example of the acidic oxide, basic oxide, amphoteric oxide and neutral oxide. State which of the oxide react with water to give a base.

Give the example of the acidic oxide, basic oxide, amphoteric oxide and neutral oxide. State which of the oxide react with a base to give salt and water.

Give the example of the acidic oxide, basic oxide, amphoteric oxide and neutral oxide. State which of the oxide react with acids and bases to give salt and water.

Give one example of –
A peroxide

Give one example of –
A mixed oxide

Give one example of –
A dioxide

Select the correct answer for the statement given below:

The neutral gas obtained on thermal decomposition of potassium nitrate.

Differentiate between the following:

An acidic oxide and a basic oxide.

State true or false. If false, correct the statement.

Smaller the size of the orbit, lower is the energy of the orbit.

What is a chemical equation ?

Why it is necessary to balance a chemical equation ?

What are the limitations of a chemical equation ?

What are the ways by which a chemical equation can be made more informative ?

Differentiate between:

Reactants and products.