Test: Chemistry - UPSC MCQ
15 Questions MCQ Test - Test: Chemistry
In India, the use of carbofuran, methyl parathion phorate and triazophos is viewed with apprehension. These chemicals are used as
[2019]
In the context of which one of the following are the terms pyrolysis and plasma gasification mentioned?
[2019]
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Consider the following pairs:
Commonly used consumed materials Unwanted or controversial chemicals likely to be found in them
1. Lipstick: Lead
2. Soft drinks: Brominated vegetable oils
3. Chinese fast food: Monosodium glutamate
Which of the pairs given above is/are correctly matched?
[2017]
Commonly used consumed materials Unwanted or controversial chemicals likely to be found in them
1. Lipstick: Lead
2. Soft drinks: Brominated vegetable oils
3. Chinese fast food: Monosodium glutamate
With reference to 'fly ash' produced by the power plants using coal as fuel, which of the following statements is/are correct?
1. Fly ash can be used in the production of bricks for building construction.
2. Fly ash can be used as a replacement for some of the Portland cement concrete.
3. Fly ash is made up of silicon dioxide and calcium oxide only, and does not contain any toxic elements.
Select the correct answer using the code given below.
[2015]
Brominated flame retardants are used in many household products like mattresses and upholstery. Why is there some concern about their use?
1. They are highly resistant to degradation in the environment.
2. They are able to accumulate in humans and animals.
Select the correct answer using the code given below.
[2014]
With reference to two non-conventional energy sources called ‘coalbed methane’ and ‘shale gas’, consider the following statements:
1. Coalbed methane is the pure methane gas extracted from coal seams, while shale gas is a mixture of propane and butane only that can be extracted from fine grained sedimentary rocks.
2. In India, abundant coalbed methane sources exist, but so far no shale gas sources have been found.
Which of the statements given above is/are correct?
[2014]
Which of the following is/are the example/ examples of chemical change?
1. Crystallization of sodium chloride?
2. Melting of ice
3. Souring of milk
Select the correct answer using the code given below.
[2014]
With reference to the usefulness of the by-products of sugar industry, which of the following statements is/are correct?
1. Bagasse can be used as biomass fuel for the generation of energy.
2. Molasses can be used as one of the feedstocks for the production of synthetic chemical fertilizers.
3. Molasses can be used for the production of ethanol.
Select the correct answer using the codes given below.
[2013]
Consider the following statements:
Chlorofluorocarbons, known as ozone-depleting substances, are used
1. In the production of plastic foams
2. In the production of tubeless tyres
3. In cleaning certain electronic components
4. As pressurizing agents in aerosol cans
Which of the statements given above is/are correct?
[2012]
Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning?
1. Smelting units
2. Pens and pencils
3. Paints
4. Hair oils and cosmetics
[2012]
What is the role of ultraviolet (UV) radiation in the water purification systems?
1. It inactivates /kills the harmful microorganisms in water.
2. It removes all the undesirable odours from the water.
3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.
Which of the statements given above is/are correct?
[2012]
Consider the following:
1. Carbon dioxide
2. Oxides of nitrogen
3. Oxides of sulphur
Which of the above is/are the emission/emissions from coal combustion at thermal power plants?
[2011]
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