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

The following experiment was performed in order to determine the formula of a hydrocarbon. The hydrocarbon X is purified by fractional distillation.

0.145 g of X was heated with dry copper (II) oxide and 224 cm³ of carbon dioxide was collected at S.T.P.

Calculate the empirical formula of X by the following step:

Calculate the mass of carbon contained in this quantity of carbon dioxide and thus the mass of carbon in sample X.

The following experiment was performed in order to determine the formula of a hydrocarbon. The hydrocarbon X is purified by fractional distillation.

0.145 g of X was heated with dry copper (II) oxide and 224 cm³ of carbon dioxide was collected at S.T.P.

Calculate the empirical formula of X by the following step:

Calculate the mass of hydrogen in sample X.

The following experiment was performed in order to determine the formula of a hydrocarbon. The hydrocarbon X is purified by fractional distillation.

0.145 g of X was heated with dry copper (II) oxide and 224 cm³ of carbon dioxide was collected at S.T.P.

Calculate the empirical formula of X by the following step:

Deduce the ratio of atoms of each element in X (empirical formula).

When a metallic oxide is dissolved in water, the solution formed has a high concentration of ____________ ions (H⁺, h₃O⁺, OH^-)

Write a balanced chemical equation for the following: 

Action of concentrated sulphuric acid on Sulphur.

State one relevant observation for given reactions:

Addition of ethyl alcohol to acetic acid in the presence of concentrated Sulphuric acid

State one relevant observation for given reactions:

Action of concentrated Sulphuric acid on hydrated copper sulfate

How will you distinguish between dilute hydrochloric acid and dilute sulphuric acid using lead nitrate solution?

When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky.

When NH4OH solution is added to the above mixture (after adding dilute HCl), it produces a white precipitate which is soluble in excess NH4OH solution.

Write balanced chemical equations to show : The oxidizing action of conc. Sulphuric acid on carbon

Write balanced chemical equations to show The dehydrating property of conc. Sulphuric acid with sugar.

Write balanced chemical equations to show how SO₃ is converted to Sulphuric acid in the contact process.

The aim of the Fountain experiment is to prove that ______.

Write balanced chemical equations for the action of dilute sulphuric acid on sodium sulphite.

State your observations when Concentrated Sulphuric acid is added to Sugar Crystals

A, B, C, and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated.

A = Typical acid property

B = Non volatile acid

C = Oxidizing agent

D = Dehydrating agent

Choose the property (A, B, C or D) depending on which is relevant to each of the following

1) Preparation of Hydrogen chloride gas

2) Preparation of Copper sulphate from copper oxide.

3) An action of conc. Sulphuric acid on Sulphur.

Identify the cations in the following case :

NH₄OH Solution, when added to the Solution (B), gives white ppt which does not dissolve in excess.

Identify the cations in the following case:

NaOH Solution, when added to Solution (C), gives white ppt which is insoluble in excess

Select from the list the gas that matches the description given in case

[ammonia, ethane, hydrogen chloride, hydrogen sulfide, ethyne]

This gas produces dense white fumes with ammonia gas.

The acid which is used in the preparation of a volatile acid