1. Objects appear to weigh less in water than air.   True   False   2. Hardness of water is caused by the presence of certain salts in it.   True   False   3. Water is known as the universal solvent.   True   False   4. A salt which absorbs water is called:   Hygroscopic Salt   Anhydrous Salt   Hydrophilic Salt   Hydrophobic Salt   Hint Half-n-half Clue   5. Water in solid form is known as   Ice   Soda   Crystal   Dry Ice   Half-n-half Clue   6. The density of ice is greater than that of water.   True   False   7. Chlorine is added to drinking water to kill microbes that cause illness. This is known as   Chlorination   Elimination   Microbe Termination   Vaporization   Half-n-half Clue