Question

. Distinguish between them:
a) Clinical thermometer and laboratory thermometer
b) Acid and base
c) Physical change and chemical change
d) Aerobic respiration and anaerobic respiration​

Answer 1

Explanation:

1. clinical thermometer is used to tell the temperature of human body
2. laboratoury thermometer is used to tell temperature of a room
3. acid cause burning sensation but bases do not

Answer 2

Answer:

a) Clinical Thermometer is meant for clinical purposes. It is developed for measuring the human body temperature. A laboratory thermometer, which is colloquially known as the lab thermometer, is used for measuring temperatures other than the human body temperature.

b) Acids are sour, gives burning sensation, generally sticky, reacts with metals to produce hydrogen gas. Although bases are opposite as they are bitter, generally odorless (except ammonia), they are slippery; bases react with fats and oils. In phenolphthalein, indicator acids remain colorless, and base gives pink color.

c) In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut

d) Aerobic respiration is a set of metabolic reactions that take place in the presence of oxygen, occurring in a cell to convert chemical energy into ATPs. Anaerobic respiration is a process of cellular respiration where the high energy electron acceptor is neither oxygen nor pyruvate derivatives.

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