Question

Name the following:(a) A metal that catches fire in oxygen gas of air.(b) A metal that forms two types of oxides and rusts in moisture; write their formulae also.(c) A metal used in hot water systems.(d) A metal used in long distance cables wires.(e) A metal added to gold to harden it.

Answer 1

Answer:

I think the answer for@ is sulphur

Answer 2

Metals

Explanation:

(a) A metal that catches fire in oxygen gas of air - Rubidium.

(b) A metal that forms two types of oxides and rusts in moisture; write their formulae also - iron. The two oxides that can be formed are FeO and FeO3.

(c) A metal used in hot water systems - Nichrome, which is an alloy of nickel (80%) and chromium (20%).

(d) A metal used in long distance cables wires - Aluminium wrapped around a steel centre.

(e) A metal added to gold to harden it - alloyed with metals like copper, silver, nickel, palladium and zinc.