Question

Choose the odd one out and state the reason:-

(i) Lead, mercury, neon, sodium.

(ii) Radon, xenon, tungsten, helium.

(iii)Freezing of water, breaking of glass, melting of wax, cooking of rice.

(iv) Flask, test tube, gas jar, test tube stand.

(v) Compound, non metals, metals, metalloids.​

Answer 1

Hydrogen

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