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(c) Name the metal which is the best conductor of heat and electricity. (d) What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.

Solution:

(c) Silver

(d) Metal chloride and hydrogen are produced when a metal combines with dilute hydrochloric acid.

Example: Mg + 2HCl → 2MgCl2 + H2