Int. Sci. WAEC Questions: Intro. To Sci. Obj. (Q1-10)

Integrated Science Current WASSCE Past Questions: Introduction To Integrated Science Objective Questions (Q1-10)

I) Candidates are expected to spend 50 seconds on each questions. Candidates are therefore required to spend between 8-9minutes on these 10 questions. Start work now!!

1. The glass stopper of a storage bottle is firmly stuck into it. How would you remove the stopper?
A. By striking several times on top of the stopper
B. By warming the bottle
C. By rubbing the neck of the bottle
D. By applying grease to the sides of the stopper

2. It is not advisable to cover a glass bottle containing sodium hydroxide with a glass stopper because the

A. bottle will crack
B. bottle will warm up
C. stopper would get stuck
D. stopper will prevent the sodium hydroxide from absorbing moisture

3. When detecting the odour of a substance it is not advisable to bring the substance very close to the nose because some chemicals
A. are highly flammable
B. are poisonous
C. are volatile
D. have some pungent smell

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4. When diluting concentrated tetraoxosulphate (VI) acid, it is advisable to add the acid slowly to the water while sitting continuously because
A. The acid does not dissolve easily in water
B. The acid and water mixture can explode
C. Heat is absorbed during the reaction
D. The water has a lower density

5. It is obligatory to wear goggles when handling substances that
A. Are corrosive
B. Are highly flammable
C. Are poisonous
D. Emit sparks

6. Care must be taken to avoid bringing a naked flame near substances that are
A. Combustible
B. Corrosive
C. Magnetic
D. Toxic

7. Safety devices to be used in a Chemistry laboratory include
I. a pair of goggles
II. nose guard
III. crash helmet
IV. hand gloves
A. I, II and III only
B. I, II and IV only
C. II, III and IV only
D. I, II, III and IV

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8. It is obligatory to wear goggles in the laboratory when handling substances that
A. Are corrosive
B. Are highly flammable
C. Are poisonous
D. Emit sparks

9. The glass stopper of a storage bottle firmly stucked into the bottle could be removed by
A. Warning the bottle
B. Rubbing the neck of the bottle
C. Striking several times on top of the bottle
D. Applying grease to the sides of the stopper

10. Which of the following steps are required in the scientific approach to problem solving
I. Identifying a problem
II. Carrying out experiment
III. Analysing the results of the experiment
IV. Drawing conclusion
A. I and II only
B. I, II and III only
C. II, III and IV only
D. I, II, III and IV

Answers
1. C
2. C
3. B
4. B
5. D

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6. A
7. B
8. D
9. B
10. D

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