JEE Main Chemistry question
The incorrect statement/s among the following is/are
I. does not exist while does. II. Lead prefers to form tetravalent compounds. III. The three bonds are not equal in the carbonate ion. IV. Both and are paramagnetic. [Kerala CEE 2008]
Answer: (C)
Solution
Statement I is true — nitrogen lacks accessible -orbitals so cannot form, whereas phosphorus can expand its octet to form . Statement II is false — due to the inert pair effect, lead actually prefers the +2 (divalent) state over +4 (tetravalent).
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