Question

question 85
which of the following puts the wavelengths of light in order from shortest to longest?
a green→violet→yellow→red
b yellow→green→red→violet
c violet→green→yellow→red
d red→yellow→green→violet
e violet→red→yellow→green
question 86
generally energy lost when transferring from one form to another is lost as.
a co₂.
b o₂.
c glucose.
d electricity.
e heat.

Explanation:

Question 85

The visible light spectrum has wavelengths in the order of violet (shortest) < blue < green < yellow < orange < red (longest). So we check each option against this order.

• Option A: green→violet→yellow→red - Incorrect as violet has a shorter wavelength than green.
• Option B: yellow→green→red→violet - Incorrect as violet has a shorter wavelength than all the others listed here.
• Option C: violet→green→yellow→red - Correct as it follows the order of increasing wavelength.
• Option D: red→yellow→green→violet - Incorrect as red has a longer wavelength than the others listed here.
• Option E: violet→red→yellow→green - Incorrect as red has a longer wavelength than yellow and green.

According to the second law of thermodynamics, when energy is transferred from one form to another, some energy is lost. In most energy transfer processes (like in mechanical, electrical - mechanical etc.), the lost energy is in the form of heat due to factors like friction (in mechanical systems) or resistance (in electrical systems).

• Option A: \(CO_2\) is a by - product in some chemical reactions (like respiration) but not the form of lost energy in general energy transfer.
• Option B: \(O_2\) is a gas involved in processes like respiration and combustion but not the form of lost energy.
• Option C: Glucose is a form of stored chemical energy in living organisms, not the lost energy.
• Option D: Electricity is a form of energy being transferred, not the lost form.
• Option E: Heat is the general form of energy lost in energy transfer processes.

Answer:

C. violet→green→yellow→red

Question 86