2000
Which of the following procedures is suitable for identifying the food colouring added to a pastry sample?
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2000 WAEC SSCE Chemistry Past Questions
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2000
Which of the following procedures is suitable for identifying the food colouring added to a pastry sample?
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2000
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
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2000
Which of the following on burning in air contributes to acid rain?
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2000
When sodium hydroxide solution is added to a solution of zinc salt, the white precipitate fromed redissolves in excess sodium hydroxide because
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2000
A colourless, odourless liquid T, gives effervesce with sodium trioxocarbonate (IV) and a white precipitate with silver trioxonitrate (V) solution T is mose probably
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2000
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
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2000
Given that the electronic configuration of an element X is 1s22s22p63s 23p4, it can be deduced that X
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2000
What is the mass number of an element if its atom contains 10 protons, 10 electrons and 12 neutrons?
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2000
Allotropes of an element differ in their
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2000
A plastic which cannot be softened by heat is described as
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2000
Biotechnology is applied in the following except
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2000
P,Q,R and S are metals in the same group in the Periodic Table but in periods 3,4, 5 and 6 respectively which of them loses electrons least readily?
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2000
If 20 cm3 of distilled water is added to 80cm 3 of 0. 50 mol dm-3 hydrochloric acid, the new concentration of the acid will be
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