A. Insecticides (e.g. moth balls)
B. Unsaturated polyesters
C. Drug intermediates e.g. β-naphthol
D. All A., B. and C.
Correct Answer: D. All A., B. and C. ✔
Last Updated: March 08, 2019
Related MCQs
- Dry air requirement for burning 1 Nm3 of CO to CO2 may be around __________ Nm3 ?
- In flue gas analysis by Orsat’s apparatus, oxygen is absorbed by__________?
- Blast furnace coke is made from coal by__________?
- For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will__________?
- Low temperature carbonisation of coal produces__________?
- Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr?
- A coal having higher volatile matter content will necessarily have lower__________?
- Function of secondary air in pulverised coal firing is to__________?
- The advantage of firing pulverised coal in the furnace lies in the fact, that it__________?
- Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter?
- The most matured coal out of the following is__________?
- (64-132) rank coal (ASTM) means a coal with 64%__________?
- Ignition temperature decreases progressively from anthracite to lignite, because__________?
- For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3), while the C.V. is same on weight basis (i.e., kcal/kg) ?
- A good metallurgical coke should have very low__________?
- Washing of coal__________?
- Insitu theory and drift theory are related to the__________?
- Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced?
- Fuel combustion is never cent per cent efficient due to__________?
- A coal with high __________ content, would ignite most easily?
- Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?
- High ash containing coke__________?
- Low temperature oxidation of coal resulting from bad storage conditions does not decrease its__________?
- Bright coal__________?
- A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the ‘carpet loss’. The carpet loss may be of the order of __________ cms?
- A fuel with high heat release rate will__________?
- The pyrogallol solution used in Orsat apparatus can absorb__________?
- In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less?
- Percentage of nitrogen in blast furnace gas may be around__________?
- During coking of coal, the ash content (percentage)__________?
- Stack (chimney) height in a big thermal power plant is dictated by the__________?
- The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called ?
- Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent?
- The calorific value is the highest out of the following for__________?
- A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon __________?
- Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier?
- Ionisation potential applied across the electrodes of electrostatic tar precipitator is around__________?
- Coal tar (produced by high temperature carbonisation) is the main source of__________?
- Hard coke is manufactured from__________?
- Which of the following is a primary fuel ?
- Coking time in narrow by-product coke ovens is around __________ hours?
- Too much of excess air in combustion results in high__________?
- Washing of coal is done to reduce the__________?
- Efficient burning of anthracite coal requires__________?
- Water gas constitutes mainly of __________?
- Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the__________?
- Benzene is used__________?
- Which of the following constituents of a fuel does not contribute to its calorific value on combustion ?
- High temperature carbonisation of coal produces__________?
- Gobar gas constitutes mainly of__________?
- Which of the following coal gasification processes will produce gas having maximum methane content ?