Q.

When zinc reacts with dilute hydro chloric acid then

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a

Surface of zinc becomes brighter

b

The metal turns into powder

c

The surface of zinc becomes black and dull

d

The reaction mixture turns green

answer is B.

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Detailed Solution

Surface of Zn becomes black and dull

Zn(s)+HCl(dll)ZnCl2+H2  due to displacement reaction Zn becomes black and dull.

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