A vapour whose molecules are in dynamic equilibrium with those of its own liquid is said to be
unsaturated
gaseous
saturated
diffused
Correct answer is C
A saturated vapour is one which is in a dynamic equilibrium with its own liquid
The maximum density of water occurs at a temperature of
0°C
4°C
37°C
273°C
Correct answer is B
This is as a result of the Hydrogen bonding in water. Due to the high Kinetic Energy of water, the hydrogen bonds can't hold for too long but from 4°C, there's an increase in the hydrogen bonds hence strenghtening it. From the point of production of more hydrogen bonds, the bonding is no longer easily broken. Generally, these and a few factors based on these cause the density of water to be maximum at 4°C.
Thermal energy added or removed from a substance that changes the state of the substance is called
latent heat
heat of reaction
calorimetry
specific heat
Correct answer is A
Latent heat is thermal energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process.
25%
36%
64%
75%
Correct answer is D
No explanation has been provided for this answer.
Which of the following devices converts light energy to electrical energy?
Bulb
Television
Solar cell
Light emitting diode (LED)
Correct answer is C
The solar cell converts light from the sun to electricity.