All 20 questions from the Post-UTME Screening (Post-UTME) Chemistry 2016 Objective paper, with the correct answer and a full explanation for each. Free, no signup needed.
[Passage: from Camara Laye's 'The African Child' - describes childhood breakfast customs, with the mother enforcing strict rules of conduct and cleanliness at meals (e.g. no talking, no gazing at older guests, only taking food from directly in front of oneself unless given more), even though the father was nominally the head of the household.] According to the narrator, the children rose in the morning
A. promptly
B. reluctantlyCorrect
C. at dawn
D. hungry
Explanation
The passage states the family rose 'after some persuasion', implying reluctance.
[Passage: from Camara Laye's 'The African Child' - describes childhood breakfast customs, with the mother enforcing strict rules of conduct and cleanliness at meals (e.g. no talking, no gazing at older guests, only taking food from directly in front of oneself unless given more), even though the father was nominally the head of the household.] We can deduce from the passage that
A. everyone mentioned ate from the same dish
B. the narrator ate from the same dish with only those who shared his bed
C. there were only two groups during the morning mealCorrect
D. there were more than two groups during the morning meal
Explanation
The passage describes 'one dish for the men, and another for my mothers and sisters' - i.e. two groups/dishes.
[Passage: from Camara Laye's 'The African Child' - describes childhood breakfast customs, with the mother enforcing strict rules of conduct and cleanliness at meals (e.g. no talking, no gazing at older guests, only taking food from directly in front of oneself unless given more), even though the father was nominally the head of the household.] Why did the father allow the mother to enforce the meal discipline?
A. She had a quicker temper than the father
B. She was the one who cooked the food
C. She had her own set of rules which she enforcedCorrect
D. The father was not a disciplinarian
Explanation
The passage states the mother's presence 'made itself felt' and that she 'saw to it that everything was done according to her own set of rules; and those rules were strict.'
[Passage: from Camara Laye's 'The African Child' - describes childhood breakfast customs, with the mother enforcing strict rules of conduct and cleanliness at meals (e.g. no talking, no gazing at older guests, only taking food from directly in front of oneself unless given more), even though the father was nominally the head of the household.] The theme of this passage
A. portrays the father as very strict
B. describes the narrator as greedy
C. describes the food as very delicious
D. portrays the mother as a disciplinarianCorrect
Explanation
The passage's central focus is on the mother's strict enforcement of rules and discipline at mealtimes.
[Passage: from Camara Laye's 'The African Child' - describes childhood breakfast customs, with the mother enforcing strict rules of conduct and cleanliness at meals (e.g. no talking, no gazing at older guests, only taking food from directly in front of oneself unless given more), even though the father was nominally the head of the household.] '...my own portion was always so generous that I should never have been tempted to take more than I was given.' This statement implies that the narrator
A. did take more than he was given
B. never took more than he was givenCorrect
C. gave other people from his generous portion
D. was never given any generous portion
Explanation
The statement explains that because his portion was already generous, he was never even tempted to take more - implying he never took more than his given share.
Trioxonitrate (V) acid prepared in the laboratory has a yellow colour due to the presence of dissolved
A. N2O
B. NO2Correct
C. NO
D. NO3
Explanation
Dissolved NO2 (formed from partial decomposition of the acid) gives laboratory-prepared concentrated trioxonitrate(V) acid its characteristic yellow tinge.
The formation of a dense white precipitate, on addition of dilute hydrochloric acid and barium chloride solution to an unknown solution on warming indicates the presence of
A. Cl -
B. SO3 2-
C. NO3 -
D. SO4 2-Correct
Explanation
Barium sulphate (BaSO4) is an insoluble white precipitate that remains even in the presence of dilute HCl, indicating the presence of sulphate ions.