Question

3. Identify the difference between the following reactions:
AgNO, + HCI
AgCl + HNO3
Mg
2HCI
MgCl + H,
4. Put √ sign against the right option
When iron nails are kept in Copper Sulphate solution for some time
a) The iron nails turn brown after some time
b) There is no change in iron nails
c) A brown colour gas is released.
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Answer 1

Answer:

In Question 3, the first reaction is double displacement reaction and second reaction is displacement reaction. (difference)

4.a is the correct ans(when iron nails are kept in copper sulphate solution then iron displaces copper from its compound . This displaced copper is deposited on the iron nails as Brown coloured substance)