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Normality

5 mL of 1N ...

Question

$5$ mL of $1 N$ HCl, $20$ mL of $\frac{N}{2}$ $H_{2} S O_{4}$ and $30$ mL of $\frac{N}{3} H N O_{3}$ are mixed together and the volume is made to $1$ L. The normality of the resulting solution is:

N/5

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N/10

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N/20

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N/40

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Solution

The correct option is D N/40
$N_{1} V_{1} + N_{2} V_{2} + N_{3} V_{3} = N_{4} V_{4}$

$(V_{4} = V_{1} + V_{2} + V_{3} + V_{H_{2} O})$ or

$V_{4} =$ Final volume $= 1 L \equiv 1000 m L$

$5 \times N + 20 \times \frac{N}{2} + 30 \times \frac{N}{3} = N_{4} \times 1000$

$∴ N_{4} = \frac{N}{40}$

Option D is correct.

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5 mL of 1N HCl, 20 mL of N2 H2SO4 and 30 mL of N3HNO3 are mixed together and the volume is made to 1L. The normality of the resulting solution is:

The correct option is D N/40N1V1+N2V2+N3V3=N4V4(V4=V1+V2+V3+VH2O) orV4= Final volume =1L≡1000mL5×N+20×N2+30×N3=N4×1000∴N4=N40Option D is correct.

$5$ mL of $1 N$ HCl, $20$ mL of $\frac{N}{2}$ $H_{2} S O_{4}$ and $30$ mL of $\frac{N}{3} H N O_{3}$ are mixed together and the volume is made to $1$ L. The normality of the resulting solution is: