A water manometer has a gauge pressure reading of 4.9 kPa when it is used to measure the pressure of a gas. What is the difference in the two water levels of the manometer?
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Question No. 2
A barometer is made using water instead of mercury in the glass tube and in the basin in which the tube is inverted. What height of water will be supported in the tube if the atmospheric pressure is 98.7 kPa?
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Question No. 3
The volume of a gas in a cylinder with a movable piston is doubled while keeping the temperature constant.
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Question No. 4
The volume of a fixed mass of gas is 15 cm³ at a pressure of 750 mm Hg and at 27 °C. What will be the volume of the gas at a pressure and temperature of:
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Question No. 5
A balloon is filled with 500 ml of helium at a temperature of 27 °C. What will be the volume of the balloon when it is placed in a container of boiling nitrogen, whose boiling point is −195 °C?
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Question No. 6
A cylinder containing an air-tight movable piston contains 10 dm³ of oxygen gas at a temperature of 20 °C and 200 kPa. What will be the volume of the gas at STP?
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Question No. 7
A fixed mass of gas at a pressure of 10⁵ Pa expands at a constant temperature of 27 °C to twice its volume. The volume is then kept constant, and the gas is heated to a temperature of 57 °C. Calculate the final pressure of the gas.
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Question No. 8
A 15-litre cylinder contains propane gas at a pressure of 20 atmospheres. When the valve of the cylinder is opened, 30 litres of the gas is used up at atmospheric pressure (1 atmosphere). Calculate:
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Question No. 9
A column of air of length 30 cm is trapped in the closed end of a long narrow capillary tube by a bead of mercury of length 10 cm, as shown in Figure A. The other end of the tube is open to the atmosphere, whose pressure is 76 cm Hg. Determine the length of the air column when the capillary tube is:
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Question No. 10
Which one of the following units is the SI unit for gas pressure?
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Question No. 11
A mercury barometer reads 76 cm Hg at sea level and is taken atop a mountain. Which reading is plausible?
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Question No. 12
Which graph correctly illustrates Boyle’s law (p∝1/V)?
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Question No. 13
The pressure of an ideal gas does NOT depend on:
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Question No. 14
You are given the following instruments: (i) Bourdon gauge (ii) manometer (iii) aneroid barometer. Which can measure tyre air pressure?
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Question No. 15
When a mercury manometer is connected to a gas cylinder, the mercury levels differ by 0.34 m. With ρ = 1.36×10⁴ kg/m³, the gauge pressure is:
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Question No. 16
A student verifying a gas law draws a graph but omits axis labels. Which is correct?
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Question No. 17
The diagram shows bulbs X (4 dm³, 300 kPa) and Y (2 dm³, vacuum) connected. On opening the valve, the pressure in Y becomes:
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Question No. 18
The pressure in a balloon is P. If volume and absolute temperature both double, the new pressure is:
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Question No. 19
A CO₂ gas has volume 0.50 m³ at 27 °C and 120 kPa. What is its volume at STP?
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