Solutions Question 210

Question: When 7.1gm,Na2SO4 (molecular mass 142) dissolves in 100,ml,H2O , the molarity of the solution is [CBSE PMT 1991; MP PET 1993, 95]

Options:

A) 2.0 M

B) 1.0 M

C) 0.5 M

D) 0.05 M

Show Answer

Answer:

Correct Answer: C

Solution:

Molarity =w×1000ml wt×Volume ml. = 7.1×1000142×100=0.5,M .



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