ICSE ICSE Class 8 - CISCE Question Bank Solutions

Give a balanced equation for –

An electrolytic decomposition reaction involving a neutral liquid

Give a balanced equation for –

A double decomposition neutralization reaction involving an acid and a base

Give a balanced equation for –

A white precipitate obtained during a double decomposition reaction involving a silver salt with sodium salt.

Complete the statement by filling in the blank with the correct word:

Decomposition of silver salts in the presence of sunlight is an example of _________.

Give a balanced equation for the following type of reaction:

A thermal decomposition reaction in which a metallic nitrate decomposes to give – a basic oxide.

Give a balanced equation for the following type of reaction:

A thermal decomposition reaction in which a compound decomposes to give two new compounds.

Differentiate between the following:

Thermal decomposition and thermal dissociation.

Differentiate between the following:

Electrolytic decomposition and photochemical decomposition.

Fill in the blank.

The chemical change involving iron and hydrochloric acid illustrates a ...............reaction.

Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.

\[\ce{AgNO3_{(aq)} + NaCl_{(aq)}-> AgCl_{(s)} + NaNO3}\]

Name a process by which hydrogen gas is manufactured.

Explain the following type of chemical reaction, giving two examples for it:

Displacement reaction

Name the type of reaction which is governed by the position of a metal in the metal activity series ?

Define the following:

Bone black

Give two uses for the following:

lampblack

Name the chemicals required for the preparation of carbon dioxide in the laboratory.

In the industrial method of preparation of hydrogen by the Bosch process give the balanced equations for the first two main steps in the production of hydrogen.

In the industrial method of preparation of hydrogen by the Bosch process give the reason for use of addition of a promoter to the catalyst in the final step.

In the industrial method of preparation of hydrogen by the Bosch process give the name of the solution which absorbs the unreacted carbon monoxide.

Give reason for the following:

In Bosch process – the final gaseous products are passed through caustic potash [KOH] soln.