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Question

Which of the following metals will react with alkali solution on heating and evolve hydrogen gas?

A
Zinc
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B
Aluminium
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C
Tin
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D
All of the above
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Solution

The correct option is D All of the above
Zinc, Aluminium and Tin will react with alkali solution on heating and evolve hydrogen gas. For example :
Zn+2NaOHNa2ZnO2+H2
2Al+2NaOH+2H2O2NaAlO2+3H2O
Sn+2NaOHNa2SnO2+H2

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