100 Level Department of Community Health exam questions and detailed answers. Download the answers in document format. Correct, detailed, and straightforward answers.
Questions:
(a) 375 cm³ of a gas has a pressure of 770 mmHg. Find its volume if the pressure is reduced to 750 mmHg.
(b) Identify which of the following is a physical or chemical change:
(i) Photosynthesis
(ii) Burning of waste (dirty)
(iii) Cooking food
(iv) Burning of a candle