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

Identify the cation of the following case:
NaOH solution when added to solution (A) gives a reddish brown precipitate

Identify the cation of the following case:
NH₄OH solution when added to solution (B) gives white ppt. which does not dissolve in excess.

Identify the cation of the following case:
NaOH solution when added to solution (C) gives white ppt. which insoluble in excess.

What is the difference between the chemical nature of an aqueous solution of HCl and an aqueous solution of NH₃

Explain the following method with example. 

Direct combination

Explain the following:

H₃PO₃ is not a tribasic acid.

Explain the following:

Nitrogen dioxide is a double acid anhydride.

Fill in the blanks with suitable words:

An acid is a compound which when dissolved in water forms hydronium ions as the only ______ ions. A base is a compound which is soluble in water and contains ______ ions. A base reacts with an acid to form a ______ and water only. This type of reaction is known as ______.

Explain why Anhydrous FeCl₃ cannot be prepared by heating hydrated iron (III) chloride.

For each of the salt: A, B, C and D, suggest a suitable method of its preparation.

A is a sodium salt.

State the term defined by the following sentence:

An acidic solution in which there is only partial ionisation of the solute molecules.

Choose the most appropriate answer from

(SO₂, SiO₂, Al₂O₃, CO, MgO, Na₂O)

A covalent oxide of a metalloid.

Write balanced equation copper sulphate solution with ammonium hydroxide solution.

The salt solution which does not react with ammonium hydroxide is ______.

What do you observe when caustic soda solution is added to the following solution: first a little and then in excess:

CuSO₄

Write a balanced equation for this reaction.

On analysis, a substance was found to contain:

C = 54.54%, H = 9.09%, O = 36.36%

The vapour density of the substance is 44, calculate its empirical formula.

An organic compound, whose vapour density is 45, has the following percentage composition,

H = 2.22%, O = 71.19% and remaining carbon. Calculate its empirical formula.

An organic compound contains H = 4.07%, Cl = 71.65% chlorine and remaining carbon. Its molar mass = 98.96. Find its Empirical formula.

A hydrocarbon contains 4.8g of carbon per gram of hydrogen. Calculate:

find the empirical formula.

Determine the formula of the organic compound if its molecule contains 12 atoms of carbon. The percentage compositions of hydrogen and oxygen are 6.48 and 51.42 respectively.