(a) State two factors on which surface tension depends.
(b) How can mosquito larvae be made to sink in stagnant water?
(a)(i) Purity of liquid
(ii) Temperature of liquid
(iii) Nature / type of liquid.
(b) Mosquito larvae can be made to sink by the addition of any of;
(i) Detergent / Soap
(ii) Alcohol
(iii) Heat
(iv) Camphor .
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