If \[CuS{{O}_{4}}.5{{H}_{2}}O(s)\rightleftharpoons \] \[CuS{{O}_{4}}.3{{H}_{2}}O\left( s \right)+2{{H}_{2}}O\left( g \right)\] \[{{K}_{p}}=1.086\times {{10}^{-4}}at{{m}^{2}}\] at \[25{}^\circ C\]. The efflorescent nature of \[CuS{{O}_{4}}.5{{H}_{2}}O\] can be noticed when the vapour pressure of \[{{H}_{2}}O\] in atmosphere is

If \[CuS{{O}_{4}}.5{{H}_{2}}O(s)\rightleftharpoons \] \[CuS{{O}_{4}}

1.	If \[CuS{{O}_{4}}.5{{H}_{2}}O(s)\rightleftharpoons \] \[CuS{{O}_{4}}.3{{H}_{2}}O\left( s \right)+2{{H}_{2}}O\left( g \right)\] \[{{K}_{p}}=1.086\times {{10}^{-4}}at{{m}^{2}}\] at \[25{}^\circ C\]. The efflorescent nature of \[CuS{{O}_{4}}.5{{H}_{2}}O\] can be noticed when the vapour pressure of \[{{H}_{2}}O\] in atmosphere is
A.	>9.72mm
B.	<7.92mm
C.	>7.92mm
D.	< 11.92mm
Answer» C. >7.92mm

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