TS EAMCET · Chemistry · p Block Elements (Group 13 & 14)
Which of the following statements about \(\mathrm{BF}_4^{-}\) and \(\mathrm{AlF}_6^{3-}\) are correct? (i) \(\mathrm{B}\) and \(\mathrm{Al}\) differ in their oxidation states. (ii) \(\mathrm{B}\) and \(\mathrm{Al}\) differ in their covalency. (iii) B obeys the octet rule. (iv) \(\mathrm{B}\) and \(\mathrm{Al}\) are in diagonal relationship.
- A (i), (ii)
- B (ii), (iii), (iv)
- C (i), (ii), (iii)
- D (ii), (iii)
Answer & Solution
Correct Answer
(D) (ii), (iii)
Step-by-step Solution
Detailed explanation
\(\mathrm{BF}_4^{-}\)and \(\mathrm{AlF}_6^{3-}\) have different covalency. \(\mathrm{BF}_4^{-}\)contain 8 electron in their octet. Therefore, statement (ii) and (iii) are correct.
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