Chemistry
Assertion (A): HCl gas is used in the preparation of chlorine and chlorides.
Reason (R): Lead chloride is not produced from HCl.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Hydrogen Chloride
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Answer
A is true but R is false.
Explanation— HCl gas dissociates into hydrogen and chlorine, when heated to 500°C and hydrogen chloride reacts with metals that come before hydrogen in the electrochemical series to form corresponding chlorides of those metals. Hence, assertion (A) is true.
When concentrated Hydrochloric acid is oxidised by strong oxidising agent like lead oxide lead chloride is formed. Hence, reason (R) is false.
Pb3O4 + 8HCl (conc.) ⟶ 3PbCl2 + 4H2O + Cl2 ↑
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Related Questions
Assertion (A): HCl gas fumes in moist air.
Reason (R): HCl gas is highly soluble.
- Both A and R are true and R is the correct explanation of A.
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Reason (R): HCl is a polar covalent compound.
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Fill in the blank from the choices in the bracket :
(a) Quicklime is not used to dry HCl gas because CaO is …………… [alkaline/acidic/neutral]
(b) When sodium chloride is heated with concentrated sulphuric acid below 200°C, one of the product formed is …………… (sodium hydrogen sulphate / sodium sulphate / chlorine).