Halides of alkaline earth metals form hydrates such as MgCl 2- 6 H 2 O - CaCl 2- 6 H 2 O - BaCl 2- 2 H 2 O and SrCl 2- 2 H 2 O- This shows that halides of group 2elementsA- Can act as dehydrating agentsB- Can absorbs moisture from airC- All of the aboveD- Are hygroscopic in nature

The correct option is C All of the aboveThe tendency to form hydrates decreases in the group ...

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Standard XII

Chemistry

Hydration Enthalpy and Lattice Enthalpy (Group 2)

Halides of al...

Question

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

Are hygroscopic in nature

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Can act as dehydrating agents

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Can absorbs moisture from air

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All of the above

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Solution

The correct option is D
All of the above

The tendency to form hydrates decreases in the group

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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 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 :

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. 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}

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

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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

The correct option is D All of the aboveThe tendency to form hydrates decreases in the group

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

The correct option is D
All of the above

The tendency to form hydrates decreases in the group