Question

the solution having lowest molar concentration 1N HCl

Answer 1

Dear
Your answer is
We know normality is equal to molarity * n-factor
So divide all the given normalities by their n- factors
On doing this we get lowest in case of Na2CO3 i.e. 0.05 M so this is your required answer
Hope it helps you
Thank you
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Answer 2

Answer:

o.1N Na2CO3

Explanation: