Question

Which metals burn in air at high temperature with the evolution of much heat?
(a) Cu
(b) Hg
(c) Pb
(d) A1

Answer 1

Answer:

(d) Aluminium burns in air at high temperatures

Answer 2

Answer:

(d)Al

Explanation:

Ignition temperature: The minimum temperature required to ignite the substance without any external agent,is known as ignition temperature.

This temperature provides the activation energy to the metal which results in high exothermic reaction.

The ignition temperature of the aluminium(2535 degree celcius) is highest among all the given option.

So, when aluminium burn in air at high temperature then there is evolution of much heat.