1. Water has the maximum density at   40oC   4oC   -4oC   0oC   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. One kg of air is compressed from 1 m3 to 0.5 m3. Which of the following statements is true?   The mass is halved.   The density is doubled.   The density is halved.   The mass is doubled.   Half-n-half Clue   5. The density of mercury is 13.6 g/cm3. So, the mass of 2 cm3 of mercury is   6 g   27.2 g   None of these   27200 g   Half-n-half Clue   6. Which of these has the highest density?   Lead   Tungsten   Mercury   Water   Half-n-half Clue   7. The SI unit of density is   g/cm3   cm3/g   m3/kg   kg/m3   Half-n-half Clue