Checkout JEE MAINS 2022 Question Paper Analysis : Checkout JEE MAINS 2022 Question Paper Analysis :

The exact volumes of 1 M NaOH solution required to neutralize 50 mL of 1 M H3PO3 solution and 100 mL of 2 M H3PO2 solution, respectively, are:

a. 100 mL and 50 mL

b. 50 mL and 50 mL

c. 100 mL and 100 mL

d. 100 mL and 200 mL

Answer: (d)

(1) 2NaOH + H3PO3 → Na2HPO3 + 2H2O

100 mmole 50mmole

100 mmole = M × Vml

100 mmole = 1 × Vml

Vml = 100 ml

(2) NaOH + H3PO2 → NaH2PO2 + H2O

200 mmole 200mmole

200 mmole = M × Vml

200 mmole=1 × Vml

Vml = 200 ml

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