12) both assertion and reason are correct
addition of non volatile solute decreases effective surface area and hence reduces vapour pressure.
1)A:PbS can be separated from ZnS be electrosatic separation method
R:PbS is a good conductor and ZnS is a poor conductor of electricity
2)A: Addtion of solvent(volatile) to solute(non volatile) always lowers Vapor presure
R:Increase in relative surface area gives rise to increase in VP
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9 Answers
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1for ques 2.
both A and R is correct and R is the correct explanation for A
29in qn1 both assertion and reason are correct..i think the answer shud be A
29i have read it somewhere that PbS is a good conductor and ZnS is a poor conductor of electricity
49well i'm in 11 and evrythng went above my head...but then can anyone elaborate on the concept of electrostatic separation method????plzzzzzz......[1][1]???