1. One kg of air is compressed from 1 m3 to 0.5 m3. Which of the following statements is true?   The density is halved.   The mass is doubled.   The density is doubled.   The mass is halved.   Hint Half-n-half Clue   2. Density is defined as   mass × acceleration   mass / volume   mass × volume   volume / mass   Half-n-half Clue   3. Water has the maximum density at   -4oC   4oC   40oC   0oC   Half-n-half Clue   4. The density of carbon dioxide is 1.8 kg/m3. So, the volume occupied by 7.2 kg of carbon dioxide is   0.2 m3   13.0 m3   4 m3   None of these   Half-n-half Clue   5. The SI unit of density is   g/cm3   m3/kg   cm3/g   kg/m3   Half-n-half Clue   6. The fraction of an iceberg submerged below the water surface is   4 / 5   1 / 5   1 / 10   9 / 10   Half-n-half Clue   7. Which of the following statements is true?   Water floats on oil because water is more dense than oil.   Oil floats on water because oil is less dense than water.   Water floats on oil because water is less dense than oil.   Oil floats on water because oil is more dense than water.   Half-n-half Clue