(English Medium) ICSE Class 10 - CISCE Important Questions for Chemistry

Write a balanced chemical equation for the reaction of sodium hydroxide solution with iron (III) chloride solution

Three solutions P, Q and R have pH value of 3.5, 5.2 and 12.2 respectively. Which one of these is a:

1) Weak acid?

2) Strong alkali?

 State one observation for each of the following  :
 A small piece of zinc is added to dilute hydrochloric acid 

Give the appropriate term defined by the statements given below :
 The substance that releases hydronium ion as the only positive ion when dissolved in water. 

 Name the particles present in :
 Weak electrolyte 

The metal that will not produce hydrogen gas when reacted with dilute acids.

Identify the substance underlined, in the following case

A solid formed by reaction of two gases, one of which is acidic and the other basic in nature

Write a balanced chemical equation for the following:

Preparation of methane from iodomethane.

Write a balanced chemical equation for the preparation of the following salts

Copper carbonate 

State what would you observe when Washing Soda Crystals are exposed to the atmosphere

State what would you observe when The salt ferric chloride is exposed to the atmosphere

Identify the anion present in the following compounds:

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

Identify the anion present in the following compounds:
When barium chloride solution is added to salt solution E a white precipitate insoluble in dilute hydrochloric acid is obtained.

From the list of the following salts choose the salt that most appropriately fits the description is given in the following:

[AgCl, MgCl₂, NaHSO₄, PbCO₃, ZnCO₃, KNO₃, Ca(NO₃)₂]

An insoluble chloride.

From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:

[AgCl, MgCl₂, NaHSO₄, PbCO₃, ZnCO₃, KNO₃, Ca(NO₃)₂]

On heating, this salt gives a yellow residue when hot and white when cold

From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:

[AgCl, MgCl₂, NaHSO₄, PbCO₃, ZnCO₃, KNO₃, Ca(NO₃)₂]

On heating this salt, a brown colored gas is evolved.

Distinguish between the given pairs of compounds using the test given within brackets:

A lead salt and a zinc salt (using excess ammonium hydroxide)

Draw the structure of the stable positive ion formed when an acid dissolves in water.

Give balanced chemical equations to prepare the following salts

Lead sulphate from lead carbonate

Give balanced chemical equation to prepare the following salt:

Copper chloride using copper carbonate