Question

1. Give reasons for the following:
a. Gold and silver are used in jewellary.
b. Copper cannot displace hydrogen from dilute acids.
c. Stainless steel does not rust easily.
d. Metals can be given different shapes according to our needs.
e. Zinc does not give hydrogen gas on reacting with HNO3.​

Answer 1

1. because they are unreative metal and have lustrous property
2. copper is less reative than hydrogen
3. Because it is mixture of metals so they do not rust easilly

Answer 2

Answer:

1 because they are shiny and not corrosive

2, because copper is lower in electromotive series than hydrogen

3, because of it's interection between alloying element and its environment

4 because metals are malleable and ductile so they can be beaten to different shapes..

5 because nitric acid Hno3 is a strong oxidizing agent..so..no hydrogen gas is produced...

Explanation:

hope you get this

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