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Standard XII

Chemistry

Introduction

Which of the ...

Question

Which of the alkaline earth metal halides given below is essentially covalent in nature ?

B e C l_{2}

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M g C l_{2}

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S r C l_{2}

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C a C l_{2}

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Solution

The correct option is A $B e C l_{2}$
$B e C l_{2}$ is covalent in nature due to small size and high charge of cation which results in high polarization power.

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Similar questions

Q. Which of the following orders of alkaline-earth metal chlorides are correct:

(a) covalent nature :

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) melting point :

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}

(d) thermal stability :

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}

Q. Assertion :Of the various chlorides of alkaline earth metals

B e C l_{2}

is covalent in nature, where as

M g C l_{2}

and

C a C l_{2}

are ionic compounds Reason:

B e

is the first member of group 2

Q. Halides of alkaline earth metals from hydrates such as,

M g C l_{2} \cdot 6 H_{2} O, C a C l_{2} \cdot 6 H_{2} O, B a C l_{2} \cdot 2 H_{2} O

, and

S r C l_{2} \cdot 2 H_{2} O

This shows that halides of group II elements :

Halides of alkaline earth metals form hydrates such as MgCl₂.6H₂O,CaCl₂.6H₂O, BaCl₂.2H₂O and SrCl₂.2H₂O. This shows that halides of group 2 elements

Some of the group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides the one which is soluble in enthanol is
(a) $B e C l_{2}$ (b) $M g C l_{2}$ (c) $C a C l_{2}$ (d) $S r C l_{2}$

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Which of the alkaline earth metal halides given below is essentially covalent in nature ?

The correct option is A BeCl2BeCl2 is covalent in nature due to small size and high charge of cation which results in high polarization power.

The correct option is A $B e C l_{2}$
$B e C l_{2}$ is covalent in nature due to small size and high charge of cation which results in high polarization power.