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CBSE Class 10 Answered

Q1) An aqueous solution of glucose is 20% in strength (by volume). The volume in which 1 gram mole of it is dissloved will be :
 
a)     9 L    b)    1.8 L   c)    8 L    d)   0.9 L
 
Q2) A solution contains 1.2046 X 1024 (10 raised to the power 24) Hydrochlric acid molecules in 1 dm3 ( volume ) of the solution. The concentration of the solution is :
 
a)     6 N    b)    2 N     c)    4 N    d)   8 N
 
Q3) The sum of mole fractions of A, B and C in an aqueous solution containing 0.2 moles of each A, B and C is :
 
a)     0.6     b)    0.2     c)    1.0     d)   1.2
Asked by Shaurya Pahal | 27 Oct, 2014, 12:22: PM
answered-by-expert Expert Answer
Dear sangeetapahal@gmail.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

In case of multiple questions within a query, please post each question individually and let us know where you are getting stuck so that we would be able to explain things better.
 
Answer for Q. 1:
 
Srength of solution is given 20% means 20 g in 100 ml.
Or we can say 200 g in 1000 ml or 1 L.
The volume of solution containing 180 g of solute will be = begin mathsize 11px style fraction numerator 180 space straight x space 1000 over denominator 200 end fraction space equals space 900 space ml space equals space 0.9 space straight L end style
Required volume = 0.9 L
 
Regards

Topperlearning Team.
Answered by Arvind Diwale | 27 Oct, 2014, 04:07: PM

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