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

Identify the anion present of the following compound:
A salt M on treatment with concentrated sulphuric acid produces a gas which fumes in moist air and gives dense fumes with ammonia.

Identify the anion present of the following compound:
A salt D on treatment with dilute sulphuric acid produces a gas which turns lime water milky but has no effect on acidified potassium dichromate solution

From the list of the following salts choose the salt that most appropriately fits the description given in the following :
[ AgCl, MgCl₂, NaHSO₄, PbCO₃, ZnCO₃, KNO₃, Ca(NO₃)₂ ]

(i) A deliquescent salt
(ii) An insoluble chloride
(iii) On heating this salt gives a yellow residue when hot and white when cold
(iv) On heating this salt, a brown coloured to prepare the following salts:

Give balanced chemical equation to prepare the following salt:
Lead sulphate from lead carbonate

Give balanced chemical equation to prepare the following salt:
Sodium sulphate using dilute sulphuric acid

Identify the gas evolved and give the chemical test in the following case:

Dilute hydrochloric acid reacts with sodium sulphite.

Identify the gas evolved and give the chemical test in the following case:

Dilute hydrochloric acid reacts with iron (II) sulphide.

Identify the salts P and Q from the observation 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.

Answer the following question related to salts and their preparations:

What kind of salt is prepared by precipitation?

Explain the following method with example. 

Displacement

Give a balanced equation for preparation of a non-volatile acid from a volatile acid.

State the term defined by the following sentence:

The insoluble solid formed when two solutions are mixed together.

Write the balanced equation for the preparation of the following compound (as major product) starting from iron and using only one other substance:

Iron (II) chloride

Write the balanced equation for the preparation of the following compound (as major product) starting from iron and using only one other substance:

Iron (II) sulphate

The preparation of Lead sulphate from Lead carbonate is a two-step process. (Lead sulphate cannot be prepared by adding dilute Sulphuric acid to Lead carbonate.)

What is the first step that is required to prepare Lead sulphate from Lead carbonate?

Why the alkali is added drop by drop to the salt solution?

1. Name the experiment illustrated below.
2. State the colour of the water that has entered the round-bottomed flask.

What property of hydrogen chloride is demonstrated when it is collected by downward delivery (Upward displacement)?

Explain with a diagram the preparation of aqueous ammonia.

Give two balanced reactions of the type to show the following property of sulphuric acid:

Dehydrating nature