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KPSC KAS 2017 · Question 140 of 200

With reference to ‘graphene’, which following statements is/are correct ? A. Graphene conducts electricity faster at room temperature than any other known material. B. Graphene is a crystalline allotrope of carbon with two-dimensional properties. C. It is a bad conductor of heat. Select the code for the correct answer from the options given below :

Science & Technology

  1. AA and B onlyCorrect
  2. BA only
  3. CB only
  4. DA, B and C

Answer: A. A and B only

Explanation

Graphene conducts electricity faster than any known material at room temperature and is a 2D carbon allotrope; it is an excellent (not bad) conductor of heat — A and B are correct.

Source: KPSC Gazetted Probationers Prelims 2017, Paper-II (General Studies, subject code 262), Series A

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