Important Chemical Compounds
Important Chemical Compounds
Common Salts in Daily Life:
1. Common Salt (NaCl):
Common salt is formed by the combination of hydrochloric acid and sodium hydroxide solution. It is the salt that we use in food. It is obtained on large scale from sea water by separating other salts from it. It may also be obtained from rock salt. Sea water contains many salts dissolved in it. Deposits of solid salt are also found in several parts of the world. These large crystals are often brown due to impurities. This is called rock salt. Beds of rock salt were formed when seas of bygone ages dried up. Rock salt is mined like coal. This salt is an important raw material for various materials of daily use, like sodium hydroxide, baking soda, washing soda, bleaching powder etc.
2. Caustic Soda [Sodium Hydroxide (NaOH)]:
When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. This process is called chlor-alkali process because of the products formed, i.e. chlor (for chlorine), and alkali (for sodium hydroxide).
3. Bleaching Powder [Calcium Oxychloride ]:
It is produced by the action of chlorine on dry slaked lime. It is represented as , though the actual composition is complex. Uses of bleaching powder: It is used for bleaching. Cotton and linen in the textile industry. Wood pulp in paper factories. Washing clothes in laundry.
On heating calcium sulphate dihydrate at 373K which out of following substances is obtained? | |||
| Right Option : D | |||
| View Explanation | |||
The chemical formula for rock salt is ___________ | |||
| Right Option : B | |||
| View Explanation | |||
Washing soda is also known as Sodium Carbonate and its chemical formula is _______________________. | |||
| Right Option : B | |||
| View Explanation | |||
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