Tick the correct answer. (3x2=6 mark Which of the following formulae represent correct chemical formulae of compounds? i. NaHSO2 X Sodium bisulphite ii. AIN. iii. Al2(SO2)3 X Alz (504)3 → NaHSO₃> Aluminium sulphate iv. CO₂ Ve N₂ A. Only ii B. Only v C. Only iii and v D. Only i, ii and iv Which of the following statements are correct?
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Al2(SO4)3
Aluminium sulphate: Aluminium sulfate is an industrial chemical used as a flocculating agent in the purification of drinking water
(ii) CaCl2
Calcium chloride: Calcium chloride is widely used as an additive in plastics, wastewater treatment plants
(iii) K2SO4
Potassium sulphate: Potassium sulfate is the preferred fertilizer for specific kinds of crops
(iv) KNO3
Potassium nitrate: It is a strong oxidizer used especially in making gunpowder, as a fertilizer, and in medicine.
(v) CaCO3
Calcium carbonate: It is a medication used to prevent or treat low blood calcium levels and also an antacid
hii , gd mrning
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