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JEE Main levelSingle correct optionDifficulty 2 of 3el082

Drinking water is disinfected with chlorine at $0.30 ppm$ (taken as $0.30 mg$ of $Cl X_{2}$ per litre). What mass of chlorine is needed to treat $7500 L$ of water?

A2250 g
B0.225 g
C22.5 g
D2.25 g

Answer: D

Mass = 0.30 mg/L x 7500 L = 2250 mg = 2.25 g.

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