Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_____________________?

A. Decrease in its calorific value
B. Increase in its strength
C. Brittleness of steel made by using it
D. None of these

A. Increase in gas pressure
B. Increase in temperature (i.e. preheating)
C. Use of pure oxygen for combustion instead of air
D. All A., B. & C.

A. CO2
B. CH4
C. H2
D. CO

A. Give less yield of tar and gas on carbonisation
B. Burn with a small non-smoky flame
C. Have a very high calorific value
D. None of these