Saved Bookmarks
| 1. |
Soap forms scum with following saltsA. Mgcl2B. NaCl C. NaCO3D. NaHCO3 |
Answer» Answer:Water is nature’s most wonderful, abundant and useful compound. Water is not only ESSENTIAL forthe lives of animals and plants, but also occupies a unique position in industries. It is widely used indrinking, bathing, sanitary, washing, irrigation, fire-fights, air-conditioning and also production ofindustrial MATERIALS. The distribution of water on the Earth’s surface is extremely UNEVEN. Only 3% Offreshwater (69% resides in glaciers, 30% underground, and less than 1% is LOCATED in lakes, rivers andswamps.) of water on the surface is FRESH; the remaining 97% resides in the ocean. Looked at anotherway, only one percent of the water on the Earth’s surface is usable by humans, and 99% of the usablequantity is situated underground. |
|