Which of the following triatomic molecules does not exist?

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${CSe}_{2}$

${CS}_{2}$

${CTe}_{2}$

${CO}_{2}$

answer is D.

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Detailed Solution

The tendency of the elements of Group 16 to form multiple bonds to C, N and O decreases down the group. ${CO}_{2}$ is very stable, ${CS}_{2}$ is moderately stable, ${CSe}_{2}$ decomposes readily and ${CTe}_{2}$ does not exist.

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