1. The density of mercury is 13.6 g/cm3. So, the mass of 4 cm3 of mercury is   3 g   54400 g   None of these   54.4 g   Hint Half-n-half Clue   2. The density of water is about 100 kg/m3 at room temperature.   True   False   3. The density of air is about 1 g/cm3 at room temperature and atmospheric pressure.   True   False   4. The density of carbon dioxide is 1.8 kg/m3. So, the volume occupied by 9.0 kg of carbon dioxide is   None of these   0.2 m3   5 m3   16.2 m3   Half-n-half Clue   5. The fraction of an iceberg submerged below the water surface is   9 / 10   1 / 10   1 / 5   4 / 5   Half-n-half Clue   6. One kg of air is compressed from 1 m3 to 0.5 m3. Which of the following statements is true?   The density is doubled.   The density is halved.   The mass is halved.   The mass is doubled.   Half-n-half Clue   7. Which of these has the highest density?   Tungsten   Mercury   Water   Lead   Half-n-half Clue