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Question 5

Give the names of the elements present in the following compounds.

(a) Quick lime
(b) Hydrogen bromide
(c) Baking powder
(d) Potassium sulphate.

Answer

(a) Calcium oxide (Cao), There are two type of elements are present first in calcium and the other is oxygen 

(b) Chemical formula of Hydrogen Bromide is HBr. There are two types of element present, the first one in hydrogen and the other in Bromine.



(c) Chemical formula of Baking powder is NaHCO3 (Sodium Hydrogen Carbonate). There are 4 types of element sodium, hydrogen, carbon and oxygen.

(d) Chemical formula of Potassium sulphate is K2SO4. There are three types of element: Potassium, sulphur and oxygen.

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