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Chemical Reactions

Question 26Fe...

Question

Question 26

Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning sulphur. Write the chemical reaction involved and identify the type of reaction.

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Solution

Given below is the chemical equation for the given chemical reaction:

$2 {FeSO}_{4} (s) Heat - - \to {Fe}_{2} O_{3} (s) + {SO}_{2} (g) + {SO}_{3} (g)$

It is a thermal decomposition reaction as one compound is breaking down into more than two products on heating.

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Q. Ferrous sulphate when heated decomposes with the evolution of gas having a characteristic odour of burning sulphur. Write the chemical reaction involved and identify the type of reaction.

Q. On heating green coloured ferrous sulphate crystals, a reddish brown solid is left out and the smell of a gas having the odour of burning sulphur is obtained. Identify the type of reaction involved.

Q. You are given the following materials:
(i) Iron nails
(ii) Copper sulphate solution
(iii) Barium chloride solution
(iv) Copper powder
(v) Ferrous sulphate crystals
(vi) Quicklime

Identify the type of chemical reaction taking place when:
(a) Barium chloride solution is mixed with copper sulphate solution and a white precipitate is observed.
(b) On heating copper powder in air in a china dish, the surface of copper powder turns black.
(c) On heating green coloured ferrous sulphate crystals, reddish brown solid is left and smell of a gas having odour of burning sulphur is experienced.
(d) Iron nails when left dipped in blue colour copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.
(e) Quick lime reacts vigorously with water releasing a large amount of heat.
Write chemical equations for each one of the above reactions.

When a green iron salt is heated strongly, its colour finally changes to brown and odour of burning sulphur is given out.

(a) Name the iron salt.

(b) Name the type of reaction that takes place during the heating of iron salt.

(c) Write a chemical equation for the reaction involved.

Q. A green coloured compound

X

when heated produce characteristics of an odour of burning sulphur. What is

X

? Also, give the chemical equation involved.

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Chemical Reactions

Standard IX Chemistry

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