Choose the correct statement from the following :
Choose the correct statement from the following :
Option 1 -
The standard enthalpy of formation for alkali metal bromides becomes less negative on descending the group.
Option 2 -
LiF has least negative standard enthalpy of formation among alkali metal fluorides.
Option 3 -
The low solubility of CsI in water is due to its high lattice enthalpy.
Option 4 -
Among the alkali metal halides, LiF is least soluble in water.
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1 Answer
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Correct Option - 4
Detailed Solution:(1) Standard enthalpy of formation for alkali metal bromides becomes more negative on descending down the group.
(2) Standard enthalpy of formation for LiF is most negative among alkali metal fluorides.
(3) In case of Csl, lattice energy is less but Cs+ having less hydration energy due to which it is less soluble in water.
(4) For alkali metal fluorides, the solubility in water increases from Li to Cs. LiF is least soluble in water.
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