(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Chemistry

Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.

Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].

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

The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.

Select the correct answer from the options given below:

State the gaseous product formed, when

An active metal reacts with dilute sulphuric acid.

Select the correct answer from the options given below:

State the gaseous product formed, when

An ammonium salt reacts with an alkali.

Differentiate between the following:

Neutralization reaction and a precipitation reaction.

Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Copper nitrate.

Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Ammonium dichromate.

Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Zinc carbonate.

Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Lead nitrate.

Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Calcium hydroxide.

Define the following term:

Chemical change

Define the following terms

Chemical bond

Define the following terms:

Effervescence

Complete the following statement.

A catalyst either ______ or _____________ the rate of a chemical change but itself remains ______________ at the end of the reaction.

Name a nitrate which produces brown gas on heating.

What do you observe? When

Silver chloride is exposed to sunlight.

What do you observe? When Hydrogen peroxide is exposed to sunlight.

What do you observe? When H₂S gas is passed through copper sulphate solution.

Give an example of a reaction where the following is involved .

Evolution of heat