Lead is used as
Telephone wires
Additive to petrol
For making alloys
All of the above
Plumbo solvency is the phenomenon of solvent action of _______ on lead.
Pure water in absence of air
Water with dissolved air
Both a and b
None of these
Which is a relatively rare element in earth’s crust among the following?
Thallium
Indium
Boron
Gallium
Why was group 18 named as inert gases?
minute quantity in atmosphere
chemical inactivity
both a and b
none of these
Electronic confguratiion of group 18 elements?
ns2np4
ns2np3
ns2np5
ns2np6
