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

The following is a list of methods for the preparation of salts.

A – direct combination of two elements

B – reaction of a dilute acid with a metal.

C – reaction of a dilute acid with an insoluble base.

D – titration of a dilute acid with a solution of soluble base.

E – reaction of two solutions of salts to form a precipitate.

Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:

Lead chloride.

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

B is an insoluble salt.

From the formula listed below, choose one, in the following case, corresponding to the salt having the given description: 

AgCl, CuCO₃, CuSO₄.5H₂O, KNO₃, NaCl, NaHSO₄, Pb(NO₃)₂, ZnCO₃, ZnSO₄.7H₂O.

An insoluble chloride.

Making use only of substances chosen from those given below:

(Dilute sulphuric acid, sodium carbonate, Zinc, sodium sulphite, Lead, calcium carbonate)

Give the equation for the reaction by which you could obtain hydrogen.

Making use only of substances chosen from those given below:

(Dilute sulphuric acid, sodium carbonate, Zinc, sodium sulphite, Lead, calcium carbonate)

Give the equation for the reaction by which you could obtain sulphur dioxide.

Making use only of substances chosen from those given below:

(Dilute sulphuric acid, sodium carbonate, Zinc, sodium sulphite, Lead, calcium carbonate)

Give the equation for the reaction by which you could obtain carbon dioxide.

Making use only of substances chosen from those given below:

(Dilute sulphuric acid, sodium carbonate, Zinc, sodium sulphite, Lead, calcium carbonate)

Give the equation for the reaction by which you could obtain zinc carbonate (two steps required).

A black coloured solid which on reaction with dilute sulphuric acid forms a blue coloured solution is ______.

State your observation:

Zinc granule is added to copper sulphate solution.

Write balanced equations for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.

Choose the correct answer from the options given below:

Which of the following is a common characteristic of a covalent compound?

1) high melting point

2) consists of molecules

3) always soluble in water

4) Conducts electricity when it is in the molten state

Calculate the percentage of water of crystallization in CuSO₄.5H₂O

(H = 1, O = 16, S = 32, Cu = 64)

State the type of bonding in the following molecule.

Water

Identify the salts P and Q from the observations given below:

On performing the flame test salt P produces a lilac coloured flame and its solution gives a white precipitate with silver nitrate solution, which is soluble in Ammonium hydroxide solution.

A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure

1) Find the number of moles of hydrogen present.

2) What weight of CO2 can the cylinder hold under similar conditions of temperature and pressure? (H = 1, C = 12, O = 16)

3) If the number of molecules of hydrogen in the cylinder is X, calculate the number of CO₂ molecules in the cylinder under the same conditions of temperature and pressure.

4) State the law that helped you to arrive at the above result.

Name the following:

A metal oxide that can be reduced by hydrogen.

Complete the following by selecting the correct option from the choices given:

The metal whose oxide, which is amphoteric, is reduced to metal by carbon reduction ____________. (Fe/Mg/Pb/Al)

_____________ (AgCl / PbCl₂), a white precipitate is soluble in excess NH₄OH

Choose the correct answer from the options given below:

The ratio between the number of molecules in 2g of hydrogen and 32g of oxygen is:

[Given that H = 1, O = 16]

State your observations when Barium chloride solution is mixed with Sodium Sulphate Solution.