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

Give the basicity of phosphoric acid.

Name the acidic anhydride of the following acid:

Nitric acid

Name the acidic anhydride of the following acid:

Phosphoric acid

Name the acidic anhydride of the following acid:

Carbonic acid

On which factor does the strength of an acid depend?

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 number of moles of carbon dioxide gas.

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.