1. Which of the following is a renewable energy resource?
a) Coal
b) Cow dunk
c) Charcoal
d) Wood
Explanation: Wood is obtained from trees and trees can be replanted easily, so the are renewable form of energy. Examples of wood-pine, cedar etc.
2. From which alcohol does softwood lignin is derived?
a) Coniferyl alcohol
b) Sinapyl alcohol
c) Ethyl alcohol
d) 4, 3 tri butyl alcohol
Explanation: Coniferyl alcohol is a phytochemical which is used as an intermediate in biosynthesis of eugenol. Sinapyl and Coniferyl alcohol can also be used in deriving hardwood lignin.
3. Which of the following fuel is preferred for space heating?
a) Coal tar
b) Diesel
c) Hydrogen gas fuel
d) Wood
Explanation: Wood has high flame emissivity (ratio of the energy radiated from a materials surface to the energy radiated from black body at same temperature and wavelength) due to which it is used in space heating.
4. By which process does the wood charcoal is obtained?
a) Destructive distillation
b) Steam distillation
c) Vacuum distillation
d) Simple distillation
Explanation: In destructive distillation the decomposition of the feedstock of wood is done by heating at high temperature. The wood charcoal so obtained is of good quality.
5. Which of the following does require wood charcoal for its production?
a) Steel alloys
b) Activated carbon
c) Alloys of tin
d) Plaster of Paris
Explanation: Activated carbon finds extensive applications for decolourisation, adsorption of gases and vapours and recovery of solvents from gases and air.
6. Which type of coal is generated by the action of fungi and bacteria?
a) Peat
b) Bituminous
c) Lignite
d) Anthracite
Explanation: It is considered as the first stage of conversion of vegetable debris into coal under water logged conditions by the action of fungi and bacteria. Peat is generally found in high altitude.
7. Which of the following country consist of the largest peat deposit?
a) India
b) Canada
c) USA
d) Russia
Explanation: Russia contains 42% of world’s peat deposits. Ireland also have a large peat content around 16.2 %
8. Which of the following content does upland type of peat consist?
a) Leaves
b) Twigs
c) Decomposed heaths and mosses
d) Sedges and grasses
Explanation: Upland peat is at the top of the peat which only consists of dead material which are decomposed heaths and mosses
9. What happens when we carbonise peat?
a) Charcoal is produced
b) Coke is produced
c) Peat is converted into lignite
d) Peat is converted into bituminous
Explanation: Under proper conditions of temperature and pressure if we carbonise peat then coke and gas is produced. But at low temperatures chars, oils and light spirit are formed
10. For what purpose does the dried peat is used?
a) Thermal insulation
b) Liquid purification
c) Destructive distillation
d) For production of calcium carbide
Explanation: Thermal insulation is the reduction of heat transfer between objects in the range of radiative influence. Dried peat is also used as fuel for steam raising and gas purification