(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Chemistry

Why is sulphuric acid used in the preparation of HCl and HNO₃? Give equations in both cases.

Give the chemical name and formula of the substance formed as a brown ring in the test for nitrate radical. 

Mention three important uses of nitric acid. Give the property of nitric acid involved in the use. 

What property of conc. H₂SO₄ is made use of in the following case? Give an equation for the reaction in this case:

In the production of HCl gas when it reacts with chloride.

The nitrate salt which does not give a mixture of NO₂ and O₂ on heating is ______.

What property of conc. H₂SO₄ is made use of in the following case? Give an equation for the reaction in this case:

In the preparation of CO and HCOOH.

The chemical used in the brown ring test is ______.

Explain with the help of a balanced equation the brown ring test for nitric acid.

What property of conc. H₂SO₄ is made use of in the following case? Give an equation for the reaction in this case:

As a source of hydrogen by diluting it and adding a strip of magnesium.

What property of conc. H₂SO₄ is made use of in the following case? Give an equation for the reaction in this case:

In the preparation of sulphur dioxide by warming a mixture of conc. sulphuric acid and copper turnings.

What property of conc. \[\ce{H2SO4}\] is made use of the following case? Give an equation for the reaction in given case:
hydrogen sulphide gas is passed through concentrated sulphuric acid.

Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test? 

The action of heat on the blue crystalline solid X gives a reddish brown gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed.

1. Identify X, Y and Z.
2. Write the equation for the action of heat on X.
3. Write the equation between solution X and gas Z.

Write the IUPAC name of the following:

\[\begin{array}{cc}
\ce{CH3}\\
|\\
\ce{CH3 -C -CH3}\\
|\\
\ce{CH3}
\end{array}\]

Name the product formed and give the appropriate chemical equation for the following:

Sodium reacting with ethyl alcohol.

Name the product formed and give an appropriate chemical equation for the following:

Ethanol oxidised by acidified potassium dichromate.

Ethanol can be oxidized to ethanoic acid. Write the equation and name the oxidizing agent.

Name an organic compound which is used for illuminating country houses.

Name an organic compound which is used for making a household plastic material.

Name an organic compound which is called ‘wood spirit’.