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Place a few granules of Zn metal in one ...

Place a few granules of Zn metal in one test tube and add 10 ml of NaOH solution. What is the observation ?

A

`1`. `CO_(2)` gas is evolved

B

`2`. `H_(2)` gas is evolved

C

`3`. `H_2O` vapour is evolved

D

`4`. `O_(2)` gas is evolved

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