Dehydration of hydrates of halides of calcium, barium and strontium i.e., $C a C l_{2} .6 H_{2} O, B a C l_{2} .2 H_{2} O, S r C l_{2} .2 H_{2} O$ can be achieved by heating. These become wet on keeping in the air. Which of the following statements is correct about these halides?

The act as dehydrating agents.

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They can absorb moisture from air.

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They have tendency to from hydrate which decreases from calcium to barium.

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All of the above

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Solution

The correct option is D All of the above
Halides of calcium, barium and strontium act as dehydrating agent as they are hygroscopic in nature. They absorb moisture. Also they have tendency to form hydrate which decreases from $C a^{2 +}$ to $S r^{2 +}$ due to increase in size and decrease in polarization power.

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Dehydration of hydrates of halides of calcium, barium and strontium i.e., $C a C l_{2} . 6 H_{2} O, B a C l_{2} .2 H_{2} O, S r C l_{2} . 2 H_{2} O,$
can be achieved by heating these become wet on keeping in the air. Which of the following statements. Is correct about these halides?
(a) Act as dehydrating agent
(b) Can absorb mositure from air
(c) Tendency to form hydrate decrease from calcium to barium
(d) All of the above

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

Q. Halides of alkaline earth metals form hydrates such as

M g C l_{2} .6 H_{2} O

C a C l_{2} .6 H_{2} O

B a C l_{2} .2 H_{2} O

and

S r C l_{2} .2 H_{2} O

. This shows that halides of group 2 elements :

Q. Consider the following statements and pick out the wrong one.
1) The solubility, thermal stability and the basic character of the hydroxides of alkaline earth metals increases from

M g (O H)_{2}

B a (O H)_{2}

2) The dehydration of hydrated chlorides, bromides and iodides of

C a, S r

and

B a

can be achieved on heating
3) The chlorides of both beryllium and aluminium are soluble in organic solvents and are used as Lewis acids.

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Dehydration of hydrates of halides of calcium, barium and strontium i.e., CaCl2.6H2O,BaCl2.2H2O,SrCl2.2H2O can be achieved by heating. These become wet on keeping in the air. Which of the following statements is correct about these halides?

The correct option is D All of the aboveHalides of calcium, barium and strontium act as dehydrating agent as they are hygroscopic in nature. They absorb moisture. Also they have tendency to form hydrate which decreases from Ca2+ to Sr2+ due to increase in size and decrease in polarization power.

Dehydration of hydrates of halides of calcium, barium and strontium i.e., $C a C l_{2} .6 H_{2} O, B a C l_{2} .2 H_{2} O, S r C l_{2} .2 H_{2} O$ can be achieved by heating. These become wet on keeping in the air. Which of the following statements is correct about these halides?