Question 2
Seas and oceans are full of water on earth. However, a very small percentage of water present on earth is available for us. This percentage is roughly (a) .006% (b) 0.006% (c) 0.6% (d) 6%
The ultimate source of all water on the earth is
(a) oceans and seas
(b) spring and wells
(c) rivers and lakes
(d) rain
Match the following:
1Molecular formula of waterA18 amu2Chemical name of waterBOceans3Molecular mass of waterCH2O4Large water bodiesDDihydrogen monoxide