When hydrogen burns in oxygen, water is formed and when water is electrolysed, then hydrogen and oxygen are produced. What type of reaction takes place:
(a) in the first case?
(b) in the second case?

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Solution

(a) Combination reaction takes place in the first case.

(b) Decomposition by electricity takes place in the second case.

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When hydrogen burns in oxygen, water is formed and when water is electrolysed, then hydrogen and oxygen are produced. What type of reaction takes place: (a) in the first case? (b) in the second case?

(a) Combination reaction takes place in the first case.(b) Decomposition by electricity takes place in the second case.

When hydrogen burns in oxygen, water is formed and when water is electrolysed, then hydrogen and oxygen are produced. What type of reaction takes place:
(a) in the first case?
(b) in the second case?

(a) Combination reaction takes place in the first case.

(b) Decomposition by electricity takes place in the second case.