Question

13. a. Zinc does not react with cold water but reacts with steam. Give reasons.
b. Write the word reaction for metals reacting with acids.
c. What is displacement reaction? Explain with an example.
d. Define malleability.

Answer 1

Answer:

a)

Zinc is moderately reactive.

So, it cant react with cold water.

Zinc needs more energy to react with water. Steam has got a lot of energy present in it.

So, zinc reacts with steam and not with cold water.

b)

Metal + Acid ---> Metal salt + Hydrogen

c)

Displacement reaction is a type of reaction in which a highly reactive metal displaces less reactive metal from its salt solution.

Eg: Fe + CuSO4 ---> FeSO4 + Cu

Here, Fe is more reactive that Cu, so Fe displaces Cu.

d)

Malleability is the property of metals that enables it to be beaten into thin sheets.

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