The degree of dissociation (α) of a weak electrolyte, AxBy is related to van't Hoff factor (i) by the expression:
1. α=x+y+1i-1
2.α=x+y-1i-1
3. α=i-1x+y+1
4. α=i-1x+y-1
Van't Hoff factor (i) = Observed Colligative PropertyNormal Colligative Property
AxBy1-α→xA+yxα+yB-xyα
Total Moles = 1-α+xα+yα = 1-αx+y-1
i=1+αx+y-11
⇒α=i-1x+y-1
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Coagulation :: The action or process of a liquid, especially blood, changing to a solid or semi-solid state.
What kind of tree can you carry in your hand?
Palm tree.
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Ozone molecule has one single bond and one double bond.
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P and Q were assigned to do a work for an amount of 1200. P alone can do it in 15 days while Q can do it in 12 days. With the help of R they finish the work in 6 days. Find the share of R ?
1/15 + 1/12 + 1/R = 1/6, we got R = 60 (it means R will take 60 days to complete the work alone)
so ratio of work done by P:Q:R = 1/15 : 1/12 : 1/60 = 5 : 4 : 1
so R share = (1/10) x 1200 = 120.
The number of ways in which six boys and six girls can be seated in a row for a photograph so that no two girls sit together is ?
We can initially arrange the six boys in 6! ways.Having done this, now three are seven places and six girls to be arranged. This can be done in ⁷P₆ ways.
Hence required number of ways = 6! x ⁷P₆
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