ICSE CHEMISTRY - PRACTICE PAPER 4

ICSE CHEMISTRY - PRACTICE PAPER 4

a)      i) Give the balanced equation for the preparation of Hydrogen chloride gas in the laboratory with the conditions required.

ii) State the identification test for Hydrogen chloride gas.

b)      Give reason why :

i) HCl gas is dried using Conc. Sulphuric acid but not using quick lime.

ii) The temperature should be maintained below 200⁰C in the preparation of HCl in the above process.

iii) Hydrogen chloride gas is not collect over water.

c)      Study the diagram and answer the following questions.

i) Identify the gas X taken in the round bottom flask.

ii) Which property of X is proved in the experiment?

iii) State the colour change seen when solution Y enters the round bottom flask.

d)     i) Hydrogen chloride gas is heavier/lighter than air.

            ii) Name the catalyst used in the given reaction.        H₂ + Cl₂ à 2HCl