Which of the following is responsible for largest amount of oxygen on earth?

Related Mcqs:

1. The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids.

   A. Mars
   B. Saturn
   C. Uranus
   D. Jupiter

2. About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is?

   A. Oxygen
   B. Cabon Dioxide
   C. Silicon
   D. Clay

3. The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a ____________?

   A. Diatonic scale
   B. Fahrenheit Scale
   C. Richter scale
   D. Celsius Scale
   E. None of these

4. The lowest region of the earth’s atmosphere comes between the earth and stratosphere. what is this region’s name?

   A. Ionosphere
   B. Troposphere 
   C. Stratosphere
   D. Mesosphere

   Submitted by: Ashfaque Ali Khoso

5. The largest latitude circle on earth is ________?

   A. Arctic circle
   B. Tropic of cancer
   C. Tropic of Capricorn
   D. The Equator

   Submitted by: Mansoor Ul Haque

6. The top atmosphere of the Earth directly reflects back into space nearly what part of the total amount of sun’s energy coming to it?

   A. 10%
   B. 20%
   C. 30%
   D. 50%

   Submitted by: Jameel Ahmed Solangi (Larkana)

7. Planets having largest amount of Carbon Dioxide is ____________?

   A. Mercury
   B. Jupiter
   C. Mars
   D. Venus

   Submitted by: Sinha Amjad

8. Which of the following organisms releases molecular oxygen into water?

   A. E.coli
   B. Phytoplankton
   C. Amoeba
   D. Salmonella

   Submitted by: Malik Asghar Hussain

9. Which among the following is responsible for producing color of human skin ___?

   A. Insulin
   B. Vitamin K
   C. Melanin
   D. DNA

   Submitted by: WIQAR AHMAD

10. Disolved oxygen (DO) in water should be?

    A. 400 to 800 ppm
    B. 4000 to 8000 ppm
    C. 0.4 to 0.5 ppm
    D. 4 to 5 ppm

    Submitted by: Palestine