1. The SI unit of density is   g/cm3   kg/m3   m3/kg   cm3/g   Hint Half-n-half Clue   2. The density of mercury is 13.6 g/cm3. So, the mass of 4 cm3 of mercury is   54400 g   54.4 g   3 g   None of these   Half-n-half Clue   3. The density of water is about 100 kg/m3 at room temperature.   True   False   4. An object floats in liquid L1, but it sinks to the bottom in liquid L2. Which statement of the following is true?   Liquid L1 has a higher density than liquid L2.   No definite conclusion can be made about the liquid densities.   Liquid L1 has a lower density than liquid L2.   Liquids L1 and L2 have the same density.   Half-n-half Clue   5. The density of air is about 1 g/cm3 at room temperature and atmospheric pressure.   True   False   6. The density of carbon dioxide is 1.8 kg/m3. So, the volume occupied by 7.2 kg of carbon dioxide is   13.0 m3   4 m3   0.2 m3   None of these   Half-n-half Clue   7. Water has the maximum density at   4oC   0oC   40oC   -4oC   Half-n-half Clue