1. Consider the following kinds of organisms:
1. Bacteria
2. Fungi
3. Flowering plants
Some species of which of the above kinds of organisms are employed biopesticides?
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
2. Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/are correct?
1. Coconut shells, groundnut shells, and rice husk can be used in biomass gasification.
2. The combustible gases generated consist of hydrogen and carbon dioxide only.
3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines.
Select the correct answer using the codes given below:
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
3. What is the role of ultraviolet (UV) radiation in water purification systems?
1. It inactivates/kills the harmful microorganisms in water.
2. It removes all the undesirable odors from the water.
3. It quickens the sedimentation of solid particles, removes turbidity, and improves the clarity of the water.
Which of the statements given above is/are correct?
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
4. Graphene is frequently in news recently. What is its importance?
1. It is a two-dimensional material and has good electrical conductivity.
2. It is one of the thinnest but strongest materials tested so far.
3. It is entirely made of silicon and has high optical transparency.
4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs, and organic LEDs.
Which of the statements given above are correct?
a) 1 and 2 only
b) 3 and 4 only
c) 1, 2, and 4 only
d) 1, 2, 3 and 4
5. 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
Select the correct answer using the codes given below:
a) 1, 2, and 3 only
b) 1 and 3 only
c) 2 and 4 only
d) 1, 2, 3 and 4
6. With reference to ‘stem cells, frequently in the news, which of the following statements is/are correct?
1. Stem cells can be derived from mammals only.
2. Stem cells can be used for screening new drugs.
3. Stem cells can be used for medical therapies. Select the correct answer using the codes given below:
a) 1 and 2 only
b) 2 and 3 only
c) 3 only
d) 1, 2 and 3
7. Which of the following is/are cited by the scientists as evidence/pieces of evidence for the continued expansion of the universe?
1. Detection of microwaves in space.
2. Observation of redshift phenomenon in space.
3. Movement of asteroids in space.
4. Occurrence of a supernova explosion in space. Select the correct answer using the codes given below:
a) 1 and 2
b) 2 only
c) 1, 3, and 4
d) None of the above can be cited as evidence
8. Consider the following crops of India:
1. Cowpea
2.Green gram
3.Pigeon pea
Which of the above is/are used as pulse, fodder, and green manure?
a) 1 and 2 only
b) 2 only
c) 1 and 3 only
d) 1, 2 and 3
9. To meet its rapidly growing, energy demand, some opine that India should pursue research and development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium hold over uranium?
1. Thorium is far more abundant in nature than uranium.
2. On the basis of per unit mass of mined minerals, thorium can generate more energy compared to natural uranium.
3. Thorium produces less harmful waste compared to uranium.
Which of the statements given above is/are correct?
a) 1 only
b) 2 and 3 only
c) 1 and 3
d) 1, 2 and 3
10. Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?
a) Hydrogen, Oxygen, Sodium
b) Carbon, Hydrogen, Nitrogen
c) Oxygen, Calcium, Phosphorus
d) Carbon, Hydrogen, Potassium
11. What are the reasons for the people’s resistance to the introduction of Bt brinjal in India?
1. Bt brinjal has been created by inserting a gene from a soil fungus into its genome.
2. The seeds of Bt brinjal are terminator seeds and therefore, the farmers have to buy the seeds before every season from the seed companies.
3. There is an apprehension that the consumption of Bt brinjal may have an adverse impact on health.
4. There is some concern that the introduction of Bt brinjal may have an adverse effect on biodiversity. Select the correct answer using the codes given below:
a) 1, 2, and 3 only
b) 2 and 3 only
c) 3 and 4 only
d) 1, 2, 3 and 4
12. Other than resistance to pests, what are the prospects for which genetically engineered plants have been created?
1. To enable them to withstand drought.
2.To increase the nutritive value of the produce.
3. To enable them to grow and do photosynthesis in spaceships and space stations.
4. To increase their shelf life.
Select the correct answer using the codes given below:
a) 1 and 2 only
b) 3 and 4 only
c) 1, 2, and 4 only
d) 1, 2, 3 and 4
13. Consider the following statements:
If there were no phenomenon of capillarity
1. It would be difficult to use a kerosene lamp.
2. One would not be able to use a straw to consumer a soft drink.
3.The blotting paper would fail to function.
4. The big trees that we see around would not have grown on the Earth.
Which of the statements given above are correct?
a) 1, 2, and 3 only
b) 1, 3, and 4 only
c) 2 and 4 only
d) 1, 2, 3 and 4
14. Vultures which used to be very common in the Indian countryside some years ago are rarely seen nowadays. This is attributed to
(a) The destruction of their nesting sites by new invasive species.
(b) A drug used by cattle owners for treating their diseased cattle.
(c) Scarcity of food available to them.
(d) A widespread, persistent, and fatal disease among them.
Answer.
1-D; 2-A; 3-A; 4-C; 5-D;
6-B; 7-A; 8-D; 9-D; 10-B;
11-C; 12-D; 13-B; 14-B;
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