(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.
(i) The kind of person the doctor is (money, possessions)
(ii) The kind of person he wants to be (appearance, ambition)
∆ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB (see Fig. 7.34). Show that ∠ BCD is a right angle.
