Name the gas evolved in each of the following cases
(i) Reaction between iron & water
(ii) Heating potassium chlorate in the presence of manganese dioxide
(iii) Action of strong heat on potassium nitrate (iv) Addition of dilute sulphuric acid to aluminium
(v) Action of heat on ammonium chloride
Answers
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Answer:
- hydrogen gas
- oxygen gas
- oxygen gas
- hydrogen gas
- ammonia and hydrogen chloride gas
Answered by
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(i) H2
(ii) O2
(iii) O2
(iv) H2
(v) NH3 and HCl
Explanation:
(i) Iron reacts with water in to form iron oxide, along with the release of hydrogen gas.
(ii) When potassium chlorate is heated in the presence of manganese dioxide catalyst, it decomposes to form potassium chloride and oxygen gas.
(iii) When potassium nitrate is heated beyond 400°C, it will decompose to form potassium oxide, nitrogen (s) and oxygen gas.
(iv) Aluminium reacts with cold dilute H2SO4 to slowly dissolve into a whitish solution of Aluminium Sulphate and hydrogen gas will be evolved.
(v) On heating, Ammonium chloride decomposes into the gases ammonia (NH3) and hydrogen chloride (HCl). This is a reversible reaction.
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