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The pressure exerted by a 760 mm column of mercury at 0° C is known as

1 pascal
1 atmosphere
1 bar
1 poise

Correct Answer: 1 atmosphere

Explanation:

1 atm: It was originally defined as the pressure exerted by 760 mm of mercury at 0 °C and standard gravity (g = 9.80665 m/s2).

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