1. By which process only saturated hydrocarbons are obtained in LPG?
a) Straight distillation
b) Thermal Cracking
c) Hydrocracking
d) Reforming
Explanation: The LPG obtained from heavier hydrocarbons by straight distillation process only contains saturated hydrocarbons, where as the LPG obtained from Thermal cracking or hydrocracking contains both saturated and unsaturated hydrocarbons.
2. Which type of LPG is mostly produced in Indian refineries?
a) Grade A
b) Grade B
c) Grade C
d) Grade D
Explanation: According to the Bureau of Indian Standards, grade B contains a mixture of butane and propane. This type of LPG are supplied for domestic uses.
3. According to the Bureau of Indian Standards which type of LPG only contains butane in them?
a) Grade A
b) Grade B
c) Grade C
d) Grade D
Explanation: Grade A consist predominantly of butanes, butylene or mixture of butanes and butylene’s. This type of LPG are most suitable for use due to their moderate rate of combustion.
4. In which regions does the LPG containing propane are found?
a) Hotter region
b) Monsoon region
c) Colder region
d) Terrestrial region
Explanation: LPG containing propane is found in the colder region due to less temperature and pressure conditions. These are found towards the north pole of the earth.
5. Liquid petroleum gas (LPG) is corrosive to steel.
a) True
b) False
Explanation: The sulphur and phosphorous content in LPG are very low due to which these are non-corrosive to steel. This type of fuel is used in industries having large steel supplies.
6. What happens when LPG is inhaled in large concentrations?
a) It kills a person
b) It increases a person’s eye sight
c) It does not have any effect on person’s health
d) It causes a little anaesthesia
Explanation: Butane and propane are present in large amount are LPG. If inhaled in large quantities, it becomes anaesthetic which can cause a person to fall after some time.
7. What is the odour of Liquid Petroleum Gas (LPG)?
a) It is odourless
b) Fruity smell
c) Undesirable odour
d) Alcoholic smell
Explanation: LPG does not have a characteristic odour. Highly odorous compounds such as ethyl and propyl merchants are deliberately mixed so as to help in the detection of any accidental leakage.
8. In which type of industries LPG is used as a fuel?
a) Steel industries
b) Plastic Industries
c) In the production of olefins
d) In the production of coal gas
Explanation: LPG is used as a feedstock for the manufacturing of olefins by the process of pyrolysis. It is also used as a domestic fuel for internal combustion engines.
9. How can we increase the ageing of alumina-silica catalyst?
a) By making the contact of catalyst with heavy metals
b) By making the contact of catalyst with lighter metals
c) By making the contact of catalyst with heavy non-metals
d) By making the contact of catalyst with lighter non-metals
Explanation: The process of ageing can be accelerated, if the catalyst comes into the contact with compounds containing sulphur, vanadium, nickel etc. The ageing can also be increased if the conditions are more rigid
10. How can we regenerate alumina-silica catalyst?
a) By increasing the particles of coke on the catalyst
b) By increasing the amount of catalyst
c) By decreasing the particles of coke on the catalyst
d) By making it react with suitable anion or cation
Explanation: The catalyst can be regenerated to store their activity and reactivity by burning of the coke deposited on the catalyst particles. The catalyst used in the catalytic reactions are very expensive, due to which their regeneration is necessary.