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Select the correct order for the given p...

Select the correct order for the given properties -
(I) Thermal stability:
`BaSO_(4) gt SrSO_(4) gt CaSO_(4) gt MgSO_(4)`
(II) Basic Nature :
`ZnO gt BeO gt MgO gt CaO`
(III) Solubility in water :
`LiOH gt NaOH gt KOH gt RbOH`
(IV) Melting point :
`NaCl gt KCl gt RbCl gt LiCl`

A

a, b, d

B

b, c

C

a, d

D

All correct

Text Solution

Verified by Experts

The correct Answer is:
C
For alkali and alkali earth metal oxide,
basic nature down the group increases
ZnO is amphoteric oxide
So, basic nature - `ZnO lt BeO lt mgO lt CaO`
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