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

10.47 g of a compound contained 6.25 g of metal A and rest non-metal B. Calculate the empirical formula of the compound [At. wt of A = 207, B = 35.5]

A hydride of nitrogen contains 87.5% percent by mass of nitrogen. Determine the empirical formula of this compound.

Find the empirical formula of a compound containing 17.64% hydrogen and 82.35% of nitrogen.

A compound X consists of 4.8% carbon and 95.2% bromine by mass. Determine the empirical formula of this compound working correctly to one decimal place (C = 12; Br = 80).

The percentage composition of sodium phosphate as determined by analysis is 42.1% sodium, 18.9% phosphorus and 39% oxygen. Find the empirical formula of the compound.

An experiment showed that in a lead chloride solution, 6.21 g of lead is combined with 4.26 g of chlorine. What is the empirical formula of this chlorine? (Pb = 207; Cl = 35.5)

Mention the colour changes observed when the following indicators are added:

Explain the following:

H₃PO₃ is not a tribasic acid

Write balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

Explain the following :

H₃PO₃ is not a tribasic acid

Write a balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

Write balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

Explain the following.

H₃PO₃ is not a tribasic acid.

______ is a white precipitate that is soluble in excess of Ammonium hydroxide solution.

Identify the cation in the following case:

Ammonium hydroxide solution when added to Solution B gives a white precipitate which does not dissolve in excess of ammonium hydroxide solution.

Write balanced equation :

Copper sulphate solution with ammonium hydroxide solution.

Convert the following reaction into a balanced chemical equation:

Ammonia to nitric oxide using oxygen and platinum catalyst.

Write a balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

Explain the following:

H₃PO₃ is not a tribasic acid.

The metal hydroxide which reacts with both acids and alkalis to form salt and water is ______.