Question

Q12. Explain with the help of examples why, decomposition reactions are termed as opposite of
combination reactions?
Q13. Write two observations for the reaction that will take place when ferrous sulphate will be
heated strongly​

Answer 1

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☞.1)In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions.

☞.2)When FeSO4. 7H2O is heated,it turns to colouless. Water droplet will be observed on the wall of the boiling tube. Removal of water molecules from the crystals will get condensed on the walls of boiling tube.

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Answer 2

Explanation:

.1)In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions.

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2)When FeSO4. 7H2O is heated,it turns to colouless. Water droplet will be observed on the wall of the boiling tube. Removal of water molecules from the crystals will get condensed on the walls of boiling tube.