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Consider the following statements:
1. Carbon fibres are used in the manufacture of the components used in automobiles and aircrafts.
2. Carbon fibres once used cannot be recycled.
Which of the statements given above is/are correct?

(a)

1 only

(b)

2 only

(c)

Both 1 and 2

(d)

Neither 1 nor 2

Correct Answer

(a)

Explanation

The correct answer is (a).st1 is right: Carbon Fibre is an important raw material for structural applications in defence, automobile aerospace and nuclear technologies. Technology can be used extensively in wind turbines and deep well oil explorations. . st2 is wrong, they can be recycled.

Microtheme: "Nanotechnology,Carbon" —
5 questions asked in Prelims in the past.

  1. [2023] Consider the following statements:
    1. Carbon fibres are used in the manufacture of the components used in automobiles and aircrafts.
    2. Carbon fibres once used cannot be recycled.
    Which of the statements given above is/are correct?

    • (a) 1 only
    • (b) 2 only
    • (c) Both 1 and 2
    • (d) Neither 1 nor 2
    Correct Answer: (A) 1 only
  2. [2022] Consider the following statements :
    1. Other than those made by humans, nanoparticles do not exist in nature.
    2. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics.
    3. Nanoparticles of some commercial products which enter the environment are unsafe for humans.
    Which of the statements given above is/are correct ?

    • (a) 1 only
    • (b) 3 only
    • (c) 1 and 2
    • (d) 2 and 3
    Correct Answer: (D) 2 and 3
  3. [2020] With reference to carbon nanotubes, consider the following statements:
    (1) They can be used as carriers of drugs and antigens in the human body.
    (2) They can be made into artificial blood capillaries for an injured part of human body.
    (3) They can be used in biochemical sensors.
    (4) Carbon nanotubes are biodegradable.
    Which of the statements given above are correct?

    • (a) 1 and 2 only
    • (b) 2, 3 and 4 only
    • (c) 1, 3 and 4 only
    • (d) 1, 2, 3 and 4
    Correct Answer: (C) 1, 3 and 4 only
  4. [2015] With reference to the use of nano-technology in 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 code given below.

    • (a) 1 only
    • (b) 2 only
    • (c) Both 1 and 2
    • (d) Neither 1 nor 2
    Correct Answer: (C) Both 1 and 2
  5. [2012] Graphene is frequently in the 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.

    • (a) 1 and 2 only
    • (b) 3 and 4 only
    • (c) 1, 2 and 4 only
    • (d) 1, 2, 3 and 4
    Correct Answer: (C) 1, 2 and 4 only