Which of the following are true?

BeCl₂ is a covalent compound

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is a lewis acid

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Both a and b

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Neither a nor b

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Solution

The correct option is C
Both a and b

$B e C l_{2}$ is a polymeric, low-melting (volatile) solid. $B e^{2 +}$ has a small size and is highly polarizable. So it tends to form covalent compounds. The structure is:

In this compound Be contains an incomplete octet . Therefore it acs as Lewis acid

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For two acids A and B, $p K_{a}$ = $1.2$ , $p K_{b}$ = $2.8$ respectively in value, then which of the following

is true

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

B e C l_{2} < M g C l_{2} < C a C l_{2} < S r C l_{2} < B a C l_{2} < R a C l_{2}

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

R a C l_{2} < B a C l_{2} < S r C l_{2} < C a C l_{2} < M g C l_{2} < B e C l_{2}

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