In flue gas analysis by Orsat’s apparatus, carbon dioxide is absorbed by______________________?

Related Mcqs:

1. In flue gas analysis by Orsat’s apparatus, carbon monoxide is absorbed by__________________?

   A. Cuprous chloride
   B. Potassium hydroxide
   C. Alkaline pyrogallol solution
   D. None of these

2. In flue gas analysis by Orsat’s apparatus, oxygen is absorbed by____________________?

   A. Potassium hydroxide
   B. Cuprous chloride
   C. Alkaline pyrogallol solution
   D. None of these

3. The sequence of absorption in flue gas analysis by Orsat’s apparatus is respectively_______________________?

   A. CO2, O2, CO
   B. CO, O2, CO2
   C. CO2, CO, O2
   D. O2, CO2, CO

4. Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO2, 20%CO and 10%O2. The percent excess oxygen used is __________________?

   A. 20
   B. 12.5
   C. 0
   D. 10

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

   A. KOH
   B. Ammoniacal cuprous chloride
   C. Pyrogallol solution
   D. None of these

6. The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always ___________________?

   A. 1
   B. < 1
   C. > 1
   D. Unpredictable

7. If CO2 is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as___________________?

   A. O2
   B. CO
   C. N2
   D. SO2

8. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

   A. 71%
   C. In between 37 & 71%
   D. None of these

9. A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the_________________?

   A. Presence of large quantity of hydrogen in the fuel
   B. Low calorific value of the fuel
   C. High sulphur content in the fuel
   D. Lack of thorough mixing of fuel with air

10. When incomplete combustion loss is high, the flue gas analysis shows large amount of ________________?

    A. CO2
    B. CO
    C. O2
    D. C