Select the correct word from the list in bracket to complete each statement.

1. The oxidised product obtained on reaction of H₂S gas with dil. HNO₃ is ……………. [sulphur dioxide / sulphur / sulphuric acid].
2. Aqua regia is a mixture of one part of …………… and three parts of …………… [conc. hydrochloric acid / conc. nitric acid] in which nitric acid …………… [reduces/oxidises] hydrochloric acid to chlorine.
3. Pure conc. nitric acid or fuming nitric acid renders the metal …………… [zinc/copper/iron] passive or inactive.
4. A mineral acid obtained from conc. nitric acid on reaction with a non-metal is …………… [hydrochloric acid / sulphuric acid / carbonic acid].
5. The reaction of …………… [calcium carbonate / calcium oxide / calcium sulphite] with dilute nitric acid is an example of a neutralization reaction.

1. The oxidised product obtained on reaction of H₂S gas with dil. HNO₃ is sulphur .
2. Aqua regia is a mixture of one part of conc. nitric acid and three parts of conc. hydrochloric acid in which nitric acid oxidises hydrochloric acid to chlorine.
3. Pure conc. nitric acid or fuming nitric acid renders the metal iron passive or inactive.
4. A mineral acid obtained from conc. nitric acid on reaction with a non-metal is sulphuric acid.
5. The reaction of calcium oxide with dilute nitric acid is an example of a neutralization reaction.