Among the statements (I - IV), the correct ones are :

Question:

Among the statements (I - IV), the correct ones are :

(I) Be has smaller atomic radius compared to $\mathrm{Mg}$.

(II) Be has higher ionization enthalpy than $\mathrm{Al}$.

(III) Charge/radius ratio of Be is greater than that of Al:

(IV) Both Be and Al form mainly covalent compounds.

  1. (I), (II) and (IV)

  2. (I), (III) and (IV)

  3. (II), (III) and (IV)

  4. (I), (II) and (III)

Correct Option: 1

Solution:

Charge/ radius ratio of Be and Al is same because of diagonal relationship. Remaining statements are correct.

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