EASY
9th ICSE
IMPORTANT
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What happens when ferrous sulphate crystals are heated?

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Important Questions on Chemical Changes and Reactions

EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHALLENGERS*>Q 8
The carbonate of metal X is a white solid. It decomposes when heated to form carbon dioxide and a yellow solid oxide. What is metal X?
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHALLENGERS*>Q 9

Sonu wanted to react potassium iodide solution with aqueous solution of lead nitrate to obtain a yellow precipitate of lead iodide. To carry out the reaction, he made the following experimental set up.

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But accidently the lead nitrate solution fall down and more lead nitrate is not available in the laboratory. Could you suggest which of the following salt he can use for performing this activity?

EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHALLENGERS*>Q 10

When mercury (II) thiocyanate is heated

I. A decomposition reaction takes place.

II. An endothermic reaction takes place.

III. Carbon disulphide gas is evolved.

The true statements are