Which of the following compound is electron deficient?

H_{2} S O_{4}

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B C l_{3}

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C C l_{4}

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P C l_{5}

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Solution

The correct option is A $B C l_{3}$
Electron-deficient groups have less than 8 electrons in their octet (incomplete octet).
Here, in $B C l_{3}$ , boron has only 6 electrons in its valence shell. Thus, $B C l_{3}$ is an electron deficient group.

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L i C l, B e C l_{2}, B C l_{3}

C C l_{4}

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