Chemistry
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).
Hydrogen Chloride
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Answer
(a) Quicklime is not used to dry HCl gas because CaO is alkaline.
(b) When sodium chloride is heated with concentrated sulphuric acid below 200°C, one of the product formed is sodium hydrogen sulphate.
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Related Questions
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.
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- A is false but R is true.
Assertion (A): HCl has sour taste.
Reason (R): HCl is highly soluble in water.
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Name :
(a) a black metallic oxide which reacts with hydrochloric acid to give a coloured solution.
(b) two colourless gases, which when mixed produce a white solid
(c) two gases which chemically combine to form a liquid.
(d) a chloride which is soluble in excess of ammonium hydroxide.
(e) the chemical in which gold can be dissolved.
(f) the experiment which demonstrates that hydrogen chloride is soluble in water.
(g) the gas produced when chlorine water is exposed to sunlight.
(h) the acid which on mixing with silver nitrate solution produces a white precipitate which is soluble in excess of ammonium hydroxide.
(i) the gas which produces dense white fumes with ammonia gas.
(j) an element which reacts with hydrogen to form compound which is strongly acidic in water.
Identify the gas evolved when :
(i) Potassium sulphite is treated with dilute hydrochloric acid.
(ii) Concentrated hydrochloric acid is made to react with manganese dioxide.