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a
A - p,r ; B - q,r ; C - r,s ; D - p,q
b
A - p ; B - q,r ; C - r,s ; D - p,r
c
A - p,q ; B - p,r ; C - q,s ; D - p,r
d
A - q ; B - p,r ; C - q ; D - p,r,s
answer is D.
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Detailed Solution
A→q, B→p,r, C→q, D→p,r,sOsmotic pressure and elevation in boiling point are the colligative properties.Vapour pressure and freezing point decrease in the presence of solute. π=CRT or π=nmRTi.e. osmotic pressure varies inversely with molecular mass. Elevation in boiling point, ΔTb=Kb⋅mwhere, Kb = ebullioscopic constant