Chemistry
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Addition of _________ [iron (III) sulphide, iron (II) sulphide, iron pyrites] to dilute hydrochloric acid results in liberation of hydrogen sulphide gas.
Related Questions
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Hydrogen chloride and water are examples of _________ [polar covalent compounds, non-polar covalent compounds] and a solution of hydrogen chloride in water _________ [contains, does not contain] free ions.
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Addition of _________ [sodium nitrate, zinc nitrate, silver nitrate] to hydrochloric acid, gives an insoluble precipitate of the respective chloride. This precipitate is _________ [soluble, insoluble] in ammonium hydroxide and _________ [soluble, insoluble] in dilute nitric acid.
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Aqua regia is a mixture of _________ [one, two, three] part/s of concentrated nitric acid and _________ [one, two, three] part/s of concentrated hydrochloric acid by _________ [weight, volume]. In aqua regia, nitric acid _________ [oxidises, reduces] hydrochloric acid to chlorine.
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Hydrochloric acid can be converted into chlorine by heating with _________ [calcium oxide, lead (II) oxide, lead (IV) oxide] which acts as a/an _________ [oxidising, reducing] agent.