Standard enthalpy of formation of RbF is

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Greater than standard enthalpy of formation of CsF

Greater than standard enthalpy of formation of KF

Greater than standard enthalpy of formation of NaF

Greater than standard enthalpy of formation of LiF

answer is A.

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Detailed Solution

Down the group with increase in size of alkali metal standard enthalpies of formation of fluorides decreases.

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