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

Fill in the blank.
To distinguish soluble  salts of zinc and lead ______ [NaOH / NH₄OH]can be used.

Choose the correct answer from the options given below :
Metal + alkali → salt + _________

What do you see when sodium hydroxide solution is added to zinc sulphate solution, till it is in excess?

Choose the correct answer:
The metal oxide which can react with acid as well as alkali is:

Write the equation for the following reaction :
Zinc oxide is treated with sodium hydroxide solution.

Name the main constituent metal in the following alloys:

Duralumin

Name the main constituent metal in the following alloy:
Stainless steel

Name the following:
Gas obtained by treating metals with hydrochloric acid.

Name :
Two colourless gases which when mixed produce a white solid.

Name the drying agent used to dry HCl gas.

How is the gas collected and why?

Describe an experiment to prove the following:
HCI gas is heavier than air.

How can you prove that hydrochloric acid contain :
Chlorine?

Choose the correct answer from the options given below: HCl gas can be prepared by direct combination of hydrogen and chlorine gas in presence of

Name two gases which combine chemically to form a solid.

Write a balanced chemical equation for reaction of ammonia with heated copper oxide

How will you show that hychloric acid contains both hydrogen and chlorine (other than by electrolysis) ?

Hydrogen chloride gas is very soluble in water. It is dissolved in water to prepare hydrochloric acid by using an anti-suction device, as shown in the diagram. Very briefly explain, how this device prevents the suction of water into the flask, in which hydrogen chloride gas is produced.

Give reason for the following:
Dilute hydrochloric acid cannot be concentrated by distilling (boiling) the dilute acid.

Dilute hydrochloric acid is added in turn to a mixture of iron and sulphur and to the compound formed between iron and sulphur. Name the gas formed in each case.