2000 - WAEC Chemistry Past Questions and Answers - page 4
Which of the following procedures is suitable for identifying the food colouring added to a pastry sample?
C8H18 will undergo the following reactions except
Which of the following is correct about both compounds show below? CH3CH 2CH2OH;CH 3
CH 2CH(OH)CH3
Which of the following needs to be hydrolysed before it shows reducing property?
Two-organic substances are labelled K and L if K gave a blue-black colour with iodine solution and L gave a deep red precipitate with Million's reagent, it can be concluded that
A colourless, odourless liquid T, gives effervesce with sodium trioxocarbonate (IV) and a white precipitate with silver trioxonitrate (V) solution T is mose probably
When sodium hydroxide solution is added to a solution of zinc salt, the white precipitate fromed redissolves in excess sodium hydroxide because
Which of the following on burning in air contributes to acid rain?
If 20 cm3 of distilled water is added to 80 cm3 of 0.50 mol dm-3 hydrochloric acid, the concentration of the acid will change to
Biotechnology is applied in the following except