Main constituent in air is ___________?

Related Mcqs:

1. The main constituent of hemoglobin is___________?

   A. Chlorine
   B. Iron
   C. Calcium
   D. None of these

2. The main Constituent of Biogas is__________?

   A. Methane 
   B. Hydrogyn
   C. Oxygen
   D. Carbin dioxide

   Submitted by: Farhan Rana

3. The main constituent of Pearls are: ______________?

   A. Calcium oxide &Ammonium Chloride
   B. Calcium Carbonate &Megnesium Carbonate
   C. Aragonite & Conchiolin
   D. None of these

   Submitted by: Fahad Mehsud

4. The main cause of air pollution is __________?

   A. Burning Of Fuels
   B. Forests
   C. Fertilizers
   D. None of these

   Submitted by: Rafi Umar

5. Quantity of fresh air required for a man is 1000 cubic feet of air for every____________?

   A. 5 minutes
   B. 10 minutes
   C. 15 minutes
   D. 20 minutes

   Submitted by: WIQAR AHMAD

6. During which process of energy exchange does cold air displace warmer air?

   A. Convection 
   B.  Radiation
   C.  Conduction
   D.  None of these

   Submitted by: Rida

7. Brass gets discoloured in air because of the presence of which of the following gases in air ________ ?

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

   Submitted by: Rashid Mehmood

8. Main use of salt in diet is to : ___________?

   A. ease the process of cooking
   B. increase the taste
   C. produce small amount of hydrochloric acid required for digestion
   D. inclease solubility of food particles in water

   Submitted by: Abid Hussain

9. The main factor for determining a region’s climate is ___________?

   A. Latitude
   B. Temperature
   C. Longitude
   D. None of them

   Submitted by: Ahmed Khan jamali

10. Air Conditioning Controls:___________?

    A. Circulation of the Air
    B. Humidity
    C. Temperature
    D. All of The Above

    Submitted by: Muhammad Ullah