VITEEE 2015 Paper

2L of 3M AgNO3 will contains 6 moles of AgNO3.
3F of 1 M BaCl2 will contain 3 moles of BaCl2
2AgNO3+BaCl2 → 2AgCl + Na(NO3)2
So, 6 moles of AgNO3 will react with 3 moles on BaCl2 it means, two solution will react completely to form 3 moles of Ba(NO3)2 = 6 moles of NO3− ions in 2 + 3 = 5L solution
Hence, molarity of NO3− =

6

5

= 1.2 M