The correct decreasing order of stability of the following sulphates is: SrSO4(I),MgSO4(II),CaSO4(III),BeSO4(IV)
A
I>III>II>IV
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B
II<IV<III<I
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C
II>I>III>IV
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D
II>III>IV>I
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Solution
The correct option is AI>III>II>IV Thermal stability of salts with common anion depends on polarising power of cation. Greater the polarising power, lower will be their thermal stability. Hence, I>III>II>IV.