Is HCl is a pure substance? It is a mixture in water, but its chemical formula is HCl, which shows it is not a mixture. So is hydrogen chloride gas a compound, or hydrochloric acid?

Open in App

Solution

HCl gas is a chemical compound and aqueous form of HCl is a homogeneous solution. That is a mixture.

Suggest Corrections

Similar questions

Explain, why (or give reasons for)
(i) In the laboratory preparation of hydrogen chloride from sodium chloride, the gas can be obtained below 200°C or above. But the lower temperature is preferred.
(ii) Hydrogen chloride is not collected over water.
(iii) Hydrochloric acid cannot be concentrated above 22.2% by boiling.
(iv) HCl gas does not conduct electricity, but hydrochloric acid conducts electricity.
(v) Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled.
(vi) When the stopper of a bottle full of HCl gas is opened there are fumes in the air.
(vii) A solution of HCl gas in water turns blue litmus red and conducts electricity, while HCl gas dissolves in toluene and it has no effect on litmus and does not conduct electricity.
(viii) An aqueous solution of chlorine is acidic in nature.

How will you prepare hydrochloric acid in laboratory?

Describe briefly the method employed to dissolve hydrogen chloride gas in water as it is prepared. What is the purpose of funnel while preparing hydrochloric acid from HCl gas?

Fill in the blanks:
(i) Aqua-regia is a mixture of _________.
(ii) A constant boiling mixture of water and hydrochloric acid is also called as _________.
(iii) ________ agent converts hydrochloric acid to chlorine.
(iv) Hydrogen and chlorine reacts in presence of _________ to form hydrogen chloride.
(v) On addition of silver nitrate to hydrochloric acid ________ precipitate is formed which is soluble in __________.
(vi) The white precipitate of lead chloride is soluble in __________.

Q. (a) Dry hydrogen chloride gas does not turn blue litmus red whereas hydrochloric acid does. Give one reason.

(b) An organic compound burns with a sooty flame. Is it a saturated or an unsaturated compound? Give reason.

Is air a pure substance ? Or a compound or mixture.

Join BYJU'S Learning Program