Consider: (i) $CO$ is a neutral oxide; (ii) $CO X_{2}$ and $N X_{2} O$ are isoelectronic; (iii) at 1 atm and room temperature graphite is the thermodynamically stable form of carbon; (iv) diamond conducts electricity because of delocalised $π$ electrons. The number of correct statements is

Answer: B

(i) is true. (ii)

CO X_{2}

has

6 + 16 = 22

electrons and

N X_{2} O

has

14 + 8 = 22

, so it is true. (iii) is true because diamond converts very slowly to the more stable graphite. (iv) is false because diamond has no free electrons. Three statements are correct.

Practice p-Block Elements: Groups 13 and 14 More on Carbon allotropes, oxides of carbon

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Consider: (i) CO is a neutral oxide; (ii) COX2​ and NX2​O are isoelectronic; (iii) at 1 atm and room temperature graphite is the thermodynamically stable form of carbon; (iv) diamond conducts electricity because of delocalised π electrons. The number of correct statements is

Answer: B

More questions on Carbon allotropes, oxides of carbon

Consider: (i) $CO$ is a neutral oxide; (ii) $CO X_{2}$ and $N X_{2} O$ are isoelectronic; (iii) at 1 atm and room temperature graphite is the thermodynamically stable form of carbon; (iv) diamond conducts electricity because of delocalised $π$ electrons. The number of correct statements is