Science & Technology mcqs#1

Q 1.Government of India encourages the cultivation of ‘sea buckthorn’. What is the importance of this plant?

1. It helps in controlling soil erosion and in preventing desertification.

2. It is a rich source of biodiesel.

3. It has nutritional value and is well-adapted to live in cold areas of high altitudes.

4. Its timber is of great commercial value.

Which of the statements given above is/ are correct?

 a.1 only

 b.2, 3 and 4 only

 c.and 3 only

 d.1, 2, 3 and 4

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Q 2.Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the earth. What prevents them from reaching the surface of the earth?

 a.The Earth’s magnetic field diverts them toward its poles

 b. layer around the Earth reflects them back to outer space

 c.Moister in the upper layers of atmosphere prevents them from reaching the surface of the Earth

 d.None of the statements (a), (b) and (c) is correct.

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Q 3.A team of scientists at Brookhaven National Laboratory including from India created the heaviest anti-matter (anti-helium nucleus). What is/are the implications of the creation of anti-matter?

1. It will make mineral prospecting and oil exploration easier and cheaper.

2. It will help probe the possibility of the existence of stars and galaxies made of anti matter.

3. It will help understand the evolution of the universe.

Select the correct answer using the codes given below:

 a.1 only

 b.2 and 3 only

c. 3 only

 d.1, 2 and 3

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Q 4.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

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Q 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 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

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Q 6.Graphene is frequently in news recently. What is its important?

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’ requires for touch screens, LCD’s and organic LED’s

Which of the statements given above are correct?

  a.1 and 2 only

 b.3 and 4 only

 c.1,2 and only

 d.1, 2, 3 and 4

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Q 7.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?

 a.1 only

 b.and 3 only

 c.1 and 3 only

 d.1, 2 and 3

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Q 8.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 correct?

1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification

2. The combustible gases generated from biomass gasification 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.and 3 only

 c.1 and 3 only

 d.1, 2 and 3

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Q 9.the following kinds of organisms:

1. Bacteria

2. fungi

3. flowering plants

some species of which of the above kinds of organisms are employed as bio pesticides?

 a.1 only

 b.2 and 3 only

 c.1 and 3 only

 d.1, 2 and 3

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Q 10.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 consume a soft drink

3. the blotting paper would paper would fail to function

4. the big trees that we see around would not have grown on the earth

Which of the following 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

Show Answer

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