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  9. Q53

APSC CCE 2024 · Question 53 of 178

Nanomaterials are usually considered to be materials with at least one external dimension that measures 100 nanometres or less. Consider the following statements regarding nanomaterials: (i) They are toxic and carcinogenic. (ii) Graphene is a well-known nanomaterial. (iii) Nanoscale titanium dioxide can be used in sunscreen lotion. (iv) Paints made from nano gold do not fade with time. Which of the above statements are correct?

Science & Tech

  1. A(ii) and (iii) only
  2. B(i) and (iv) only
  3. C(i), (iii) and (iv) only
  4. DAll the statements are correctCorrect

Answer: D. All the statements are correct

Explanation

Official key gives (D). Note: statement (i) as a blanket claim is a simplification — many nanomaterials are not toxic — but the official key treats all four as correct; flagged for review.

Source: APSC CCE Prelims 2024 GS Paper-I, official Series-A paper (DUCN-I-24/43-A), answer from official Series-A key

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