Biology 11 Chapter 2
Biological Molecules - 11
1.
The amount of heat required to raise the temperature of 1 kg of water by 01
o
C is called?
a) Specific heat
b) Heat capacity
c) Absolute heat
d) Two answers are correct
2.
A large increase in heat energy results in a relatively small rise in temperature of water. It means?
a) Water has a low Specific heat capacity
b) Water has a low heat capacity
c) Water has a high Specific heat capacity
d) Water has a high heat capacity
3.
Much of the energy is used in breaking the hydrogen bonds, which restrict the movement of molecules, that why?
a) Water has a high heat capacity
b) Water has a low heat capacity
c) Water has a high Specific heat capacity
d) Water has a low Specific heat capacity
4.
How water protects organisms from rapid temperature changes and helps them to maintain their normal internal temperature?
a) Temperature falls slowly
b) Two answers are correct
c) Water has a high Specific heat capacity
d) Temperature rises slowly
5.
How water helps to moderate the Earth’s temperature?
a) High boiling point
b) By remaining in a liquid state at a temperature suitable to living things
c) All answers are correct
d) Suitable freezing point
6.
How water gives animals, in a hot environment an efficient way to release excess body heat?
a) By remaining in a liquid state at a temperature suitable to living things
b) Two answers are correct
c) By vapourising the sweat thus cooling the animal
d) By drinking water
7.
What is meant by high heat of vapourization in animals?
a) Large amount of heat can be lost with minimal loss of water from the body
b) By sticking individual molecules
c) Large amount of water can be lost with minimal loss of heat from the body
d) By separating individual molecules
8.
Cohesion is the force whereby individual molecules________. Water flows freely owing to______?
a) Separate, freezing point
b) Stick together, freezing
c) Stick together, freezing point
d) Stick together, cohesion
9.
Which property of water is important for aquatic and other living organisms?
a) It’s high Specific heat capacity
b) It’s low Specific heat capacity
c) It’s low heat capacity
d) It’s high heat capacity
10.
The high heat of vapourization means that water has a?
a) Low Specific heat
b) High freezing point
c) High Specific heat
d) High boiling point
This is more feedback!
This is the feedback!
