WAEC Physics 2017 Theory — Question 6
Question 6 of 33 from the West African Examinations Council (WAEC) Physics 2017 Theory paper, with the correct answer and a full explanation.
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5(b) How can mosquito larvae be made to sink in stagnant water?
Model answer
A mosquito larva can be made to sink in stagnant water by reducing the surface tension of the stagnant water. This can be done by: (i) adding impurities e.g. soap, oil, alcohol, detergent, camphor etc. (ii) heating the liquid or increasing the temperature of the liquid.
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