Which one of the following wavelengths of light is most effective in photosynthesis?

Related Mcqs:

1. Very High Frequency (VHF) have __________ wavelengths?

   A. shorter
   B. shortest
   C. longer
   D. longest

2. Which of the following gases do plants and trees give out during photosynthesis?

   A. Hydrogen
   B. Nitrogen
   C. Oxygen
   D. Carbon dioxide

   Submitted by: ABDUL HAYEE

3. The source of oxygen in photosynthesis is

   A. water
   B. salts
   C. minerals
   D. glucose

4. In night, when photosynthesis is stopped, plants__________?

   A. take in Carbon Dioxide
   B. give off Oxygen
   C. give off Carbon Dioxide
   D. None of these

5. In which part of the Plant does photosynthesis take place?

   A. Flowers
   B. Roots
   C. Stem
   D. Leaves

   Submitted by: ABDUL HAYEE

6. Which of the following is mainly used for light patrol engines ?

   A. Kerosene oil
   B. Paraffin oil
   C. Heavy Fuel oil
   D. Gasoline

   Submitted by: Faheem Zaman Dhaunroo

7. Which of the following phenomena of light are involved in the formation of a rainbow?

   A. Refraction
   B. Dispersion
   C. Total internal reflection
   D. All of the above

   Submitted by: Safdar Abbas

8. Water is a highly effective coolant for a car engine because _________?

   A. Water is good conductor of heat
   B. Water has very high specific heat capacity
   C. Water boils at a comparatively high temperature
   D. Evaporation of water produces lot of cooling

9. What are the primary colors of Light?

   A. White, Black, Blue
   B. Red, Yellow, Blue
   C. Red, Orange, Blue
   D. Red, Green, Blue

10. A light year is a unit of ?

    A. Time
    B. Energy
    C. distance
    D. Mass