1. One arm of a glass U-tube is open to the atmosphere, whereas the other vertical arm is connected to a gas supply. The difference in levels of mercury (density = 13.6 g cm-3) between the vertical arms of the U-tube manometer is h = 2 cm. If the atmospheric pressure is 760 mm Hg and the gravitational acceleration is 9.8 m s-2, then the pressure of the gas is about   1.040 × 106dynes cm-2   1.016 × 107dynes cm-2   1.061 × 104dynes cm-2   2.666 × 104dynes cm-2   Hint Half-n-half Clue   2. To measure the atmospheric pressure, the space (labeled A) above the mercury level in a barometer tube is   essentially vacuum   filled with water   filled with nitrogen   filled with air   Half-n-half Clue   3. 24 litres of a gas at a pressure of 4 bar are compressed to 6 litres without any change in the temperature. The final pressure of the gas is about   1.00 bar   16.0  bar   24  bar   1.50  bar   Half-n-half Clue   4. Soap bubbles are spherical in shape because   soap film has a low surface tension   air trapped inside the bubble has low pressure   spherical shape has the highest ratio of surface area to volume   air exerts equal pressure in all directions   Half-n-half Clue   5. Pressure is defined as   mass / volume   mass × acceleration   force / area   force × distance   Half-n-half Clue   6. _______ is a type of barometer that consists essentially of a thin metal box exhausted of air.   Anemometer   Aneroid   Hydrometer   Manometer   Half-n-half Clue   7. If the average atmospheric pressure at sea level can support 10.34 m of vertical length of a water column, then its magnitude is about _______ Pa. Assume density of water = 1 g cm−3 and gravitational acceleration = 9.8 m s−2.   100   1000   100000   10000   Half-n-half Clue