Question : Sweating or perspiration is nature's way of:
Option 1: Lowering the internal temperature of the body
Option 2: Releasing excess salt from the body
Option 3: Warding off harmful insects through the bad odour of the sweat
Option 4: Releasing excess water from the body
Correct Answer: Lowering the internal temperature of the body
Solution : The correct option is Lowering the internal temperature of the body.
Perspiration, another name for sweating, is a normal physiological process the body uses to control its internal temperature. Sweating serves to keep the body's core temperature steady and cool. The human body works hard to keep its internal temperature at the ideal level for several physiological functions.
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Question : What is a brine solution?
Option 1: Excess salt + water
Option 2: Silver
Option 3: Excess ethanol + water
Option 4: Excess starch + water
Question : If the water smells bad, then that odour can be removed by adding:
Option 1: Alum
Option 2: Bleach
Option 3: Activated carbon
Option 4: Deactivated carbon
Question : Rate of cooling depends on the:
Option 1: temperature difference between the body and the surrounding
Option 2: nature of the radiating surface
Option 3: area of the radiating surface
Option 4: all of these
Question : If 4 litres of water is evaporated on boiling from 12 litres of salt solution containing 7 percent salt, the percentage of salt in the remaining solution is:
Option 1: 10.5%
Option 2: 11.5%
Option 3: 12%
Option 4: 13%
Option 1: alum
Option 2: bleach
Option 3: activated carbon
Option 4: deactivated nitrogen
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