Match the following : i. Chalk A) CaO ii. Quick Lime B) Ca(OH)2 iii. Slaked lime C) NaHCO3 iv. Sodium bicarbonate D) CaCO3 (a) (i - D), (ii- B), (iii - A), (iv - C) (b) (i - D), (ii - A), (iii - B), (iv - C) (c) (i - B), (ii - A), (iii - D), (iv - C) (d) (i - C), (ii - D), (iii - B), (iv - A)
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(b) (i - D), (ii - A), (iii - B), (iv - C)
- Chalk:- Chalk is made up primarily of CaCO3 (calcium carbonate), with minor elements of silt and clay. It is insoluble with water.
- Quick lime:- Calcium oxide (CaO), also known as quicklime, is a chemical substance that is frequently utilised. At room temperature, it is a white, caustic, alkaline, crystalline solid.
- Slaked lime:- Slaked lime is calcium hydroxide Ca(OH)2, which is made by mixing water with calcium oxide. The reaction is exothermic so, it's highly dangerous.
- Sodium bicarbonate:- The chemical compound sodium bicarbonate, has the formula NaHCO3. Sodium bicarbonate is a crystalline white substance that frequently appears as a fine powder. It has an alkaline, slightly salty flavour.
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