12th a (i) , (ii) , (iii)
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1.on heating metal it expands ands its surface area, volume ,length increases will increase witg temprature .thermal expansion varies with different types of metal
2. when metal is heated with dil. HCl ,HCl oxidise them to thier respective metal chloride and hydrogen is released
M+HCl--------------MClx+H2
3. when reacted with ZnSO4,respective metal sulphate along with Zn will be formed
I hope this may help u
2. when metal is heated with dil. HCl ,HCl oxidise them to thier respective metal chloride and hydrogen is released
M+HCl--------------MClx+H2
3. when reacted with ZnSO4,respective metal sulphate along with Zn will be formed
I hope this may help u
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