`40% W"/"V NaCl` solution (specific gravity `=1.12`) is equivalent to : `3.57xx10^(5)` p pm, `3.57xx10^(6)` p pm, `1.10^(6)` p pm, `4xx10^(3)` p pm

Options

A. `3.57 xx 10 ^(5)` ppm
B. `3.57 xx 10 ^(6)` ppm
C. `1. 10 ^(6)` ppm
D. `4 xx 10 ^(5)` ppm

Answer

A

Explanation

For `40%` W/V NaCl solution, 100 mL of solution contains 40 g of NaCl
Given density (specific gravity) `= 1. 12 g mL ^(-1)`
Solution contains 40 g of NaCl, `10^(6)` of solution contains X g of NaCl
`X = (40)/(112) xx 10 ^(6) = 3. 57 xx 10 ^(5) ` ppm