Multiple choice

In a 20 litre flask, 60 litres of $N_{2}$ at 760 mm, 32 litres of $H_{2}$ at 740 mm are mixed. The total pressure of the mixture at the same temperature is :

  1. 3740 mm

  2. 1120 mm

  3. 2442 mm

  4. 3464 mm
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D Correct answer
Explanation

Using Boyle's Law (P1V1 = P2V2) for each gas in a 20L flask: P_N2 = (760 * 60) / 20 = 2280 mm. P_H2 = (740 * 32) / 20 = 1184 mm. Total pressure = 2280 + 1184 = 3464 mm.

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