1. 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 contents of 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 codes are given below.
a) 1 and 2
b) 2 only
c) 1 and 3
d) 3 only
2. With reference to the use of nanotechnology in the health sector, which of the following statements is/are correct?
1. Targeted drug delivery is made possible by nanotechnology.
2. Nanotechnology can largely contribute to gene therapy.
Select the correct answer using the codes given below.
a) 1 only
b) 2 only
c) Both 1and 2
d) Neither 1 nor 2
3. In the context of modern scientific research, consider the following statements about
'IceCube', a particle detector located at the South Pole, which was recently in the news :
1. It is the world's largest neutrino detector, encompassing a cubic kilometer of ice.
2. It is a powerful telescope to search for dark matter.
3. It is buried deep in the ice.
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.With reference to 'Near Field Communication (NFC) Technology', which of the following statements is/are correct?
1. It is a contactless communication technology that uses electromagnetic radio fields.
2. NFC is designed for use by devices that can be at a distance of even a meter from each other.
3. NFC can use encryption when sending sensitive information.
Select the correct answer using the codes given below.
a) 1 and 2 only
b) 3 only
c) 1 and 3 only
d) 1, 2 and 3
5. The term 'Goldilocks Zone' is often seen in the news in the context of
a) the limits of the habitable zone above the surface of the Earth
b) regions inside the Earth where shale gas is available
c) search for the Earth-like planets in outer space
d) search for meteorites containing precious metals
6. With reference to 'fuel cells' in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements:
1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.
2. Fuel cells can be used for powering buildings and not for small devices like laptop computers.
3. Fuel cells produce electricity in the form of Alternating Current (AC).
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
Answer:
1-A; 2-C; 3-D; 4-C; 5-C;
6-A;
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