1. If the density of liquid A (carbon tetrachloride) is 1.6 g cm-3 and its height hA = 15.0 cm, then the density of oil B of height hB = 30 cm in the U-tube is about   0.31 g cm-3   3.20 g cm-3   0.80 g cm-3   1.25 g cm-3   Hint Half-n-half Clue   2. _______ is a type of barometer that consists essentially of a thin metal box exhausted of air.   Hydrometer   Manometer   Aneroid   Anemometer   Half-n-half Clue   3. What instrument is used for measuring atmospheric pressure?   Sphygmomanometer   Hygrometer   Barometer   Hydrometer   Half-n-half Clue   4. 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 = 3 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   1.017 × 107dynes cm-2   1.053 × 106dynes cm-2   1.074 × 104dynes cm-2   3.998 × 104dynes cm-2   Half-n-half Clue   5. _______ states that the product of the pressure and volume of a fixed mass of gas is constant provided the temperature is unchanged.   Boyle's Law   Avogadro's Law   Charles' Law   Dalton's Law   Half-n-half Clue   6. 2 Pa = _______ dynes cm-2   0.2   20   200000   2e-05   Half-n-half Clue   7. 35 litres of a gas at a pressure of 4 bar are compressed to 7 litres without any change in the temperature. The final pressure of the gas is about   20.0  bar   35  bar   1.40  bar   0.80 bar   Half-n-half Clue