Question

Many transition metals form interstitial compounds. The characteristics of these interstitial compounds are:
(I) They have high melting points, higher than those of pure metals
(II) They are very hard
(III) They retain metallic conductivity
(IV) They are chemically more reactive than the pure metals

• A. $I,II,III$
• B. $I,II$
• C. $II,IV$
• D. $IV$ only

Answer 1

The correct option is A $I,II,III$

(I) They have high melting points, higher than those of pure metals

(II) They are very hard

(III) They retain metallic conductivity

here the option i, ii and iii is correct