Select the correct order for the given properties -
I) Thermal Stability: $B a S O_{4} > S r S O_{4} > C a S O_{4} > M g S O_{4}$
II) Basic Nature: $Z n O > B e O > M g O > C a O$
III) Solubility in water: $L i O H > N a O H > K O H > R b O H$
IV) Melting point: $N a C l > K C l > R b C l > L i C l$

I, IV

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I, II and IV

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II, III

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All are correct

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Solution

The correct option is A I, IV
I) Thermal Stability: $B a S O_{4} > S r S O_{4} > C a S O_{4} > M g S O_{4}$ Correct
II) Basic Nature: $Z n O > B e O > M g O > C a O$ Incorrect
III) Solubility in water: $L i O H > N a O H > K O H > R b O H$ Incorrect
IV) Melting point: $N a C l > K C l > R b C l > L i C l$ Correct
So answer is (A) I, IV

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Select the correct order for the given properties - I) Thermal Stability: BaSO4>SrSO4>CaSO4>MgSO4 II) Basic Nature: ZnO>BeO>MgO>CaO III) Solubility in water: LiOH>NaOH>KOH>RbOH IV) Melting point: NaCl>KCl>RbCl>LiCl

The correct option is A I, IVI) Thermal Stability: BaSO4>SrSO4>CaSO4>MgSO4 Correct II) Basic Nature: ZnO>BeO>MgO>CaO Incorrect III) Solubility in water: LiOH>NaOH>KOH>RbOH Incorrect IV) Melting point: NaCl>KCl>RbCl>LiCl Correct So answer is (A) I, IV