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

A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure. What mass of carbon dioxide can it hold under similar conditions of temperature and pressure?

If a crop of wheat removes 20 kg of nitrogen per hectare of soil, what mass of the fertilizer, calcium nitrate Ca(NO₃)₂ would be required to replace the nitrogen in a 10 hectare field?

When heated, potassium permanganate decomposes according to the following equation :

\[\ce{2KMnO4 -> \underset{\text{solid residue}}{K2MnO4 + MnO2} + O2}\]

(a) Some potassium permanganate was heated in the test tube. After collecting one litre of oxygen at room temperature, it was found that the test tube had undergone a loss in mass of 1.32 g. If one litre of hydrogen under the same conditions of temperature and pressure has a mass of 0.0825 g, calculate the relative molecular mass of oxygen.

(b) Given that the molecular mass of potassium permanganate is 158. What volume of oxygen (measured at room temperature) would be obtained by the complete decomposition of 15.8 g of potassium permanganate? (Molar volume at room temperature is 24 litres)

Ammonia burns in oxygen and the combustion, in the presence of a catalyst, may be represented by;

\[\ce{2NH3 + 2 1/2O2 -> 2NO + 3H2O}\] [H = 1, N = 14, O = 16]

What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?

Write an equation for the reaction of hydrochloric acid on manganese (IV) oxide.

Write a balanced equation for the following conversion:

Sodium chloride from sodium sulphite and dilute hydrochloric acid.

Distinguish between the following:

Dilute HCl and dilute HNO₃ [using silver nitrate solution]

The vapour density of CH₃OH is ______. (At. Wt. C = 12, H = 1, O = 16)

Draw the electron dot structure for the following:

A molecular nitrogen

[At. No. : N = 7, H = 1]

Convert the following reaction into a balanced chemical equation:

Ferrous sulphide to hydrogen sulphide using hydrochloric acid.

Write an equation for the reaction of hydrochloric acid on manganese (IV) oxide.

Convert hydrochloric acid to nascent chlorine.

Write an equation for the reactions of hydrochloric acid on manganese (IV) oxide.

Draw the electron dot structure of Methane molecule.

[Atomic number: N = 7, C = 6, H = 1]

Draw the electron dot structure of Nitrogen molecule.

[Atomic number: N = 7, C = 6, H = 1]

Convert hydrochloric acid to nascent chlorine.

Write an equation for the reactions of hydrochloric acid on manganese (IV) oxide.

Carbon tetrachloride is a ______ covalent molecule.

The following table shows the electronic configuration of the atoms A, B, C and D.

1. Write the formula of the compound formed between:
   
   1. A and B
   2. D and C
2. Which of the above elements will exhibit catenation?

Convert hydrochloric acid to nascent chlorine.