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3. ATOMS AND MOLECULES
medium
Give the names of the elements present in the following compounds.
$(a)$ Quick lime
$(b)$ Hydrogen bromide
$(c)$ Baking powder
$(d)$ Potassium sulphate.
Option A
Option B
Option C
Option D
Solution
$(a)$ Quick lime – Calcium oxide – $CaO$
Elements -Calcium, oxygen.
$(b)$ Hydrogen bromide- $HBr$
Elements – Hydrogen, bromine.
$(c)$ Baking powder- Sodium hydrogen carbonate – $NaHCO_3$
Elements- Sodium, hydrogen, carbon, oxygen.
$(d)$ Potassium sulphate – $K_2SO_4$
Elements – Potassium, sulphur, oxygen.
Standard 9
Science
