A.18
B.19
C.20
D.21
Related Mcqs:
- Stratovolcano forms impressive, snow-capped peak which is often exceeding ______ in height, ______ in area and ______ in volume:
- The ratio of oxygen available to the oxygen required for stabilization of sewage is called
- For combustion of one kg of carbon the quantity of oxygen required (air contains 23% by wight of oxygen) is
- A jar contains a mixture of oxygen and hydrogen gas in the ratio 1 : 5. The ratio of mean knetic energies of hydrogen and oxygen molecules is
- Between the two identical bonds having different maturity periods, the price of the ______ bond will change less than that of ______ bonD.?
- Core has a pressure of ______ times greater than the atmospheric pressure ______ billion.
- Nitrogen is ______ % in the air:
- The total height of homosphere is ______ km:
- The greatest concentration of ozone is found at ______ km:
- The average height of troposphere from surface is ______ km:
