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Home ‣ Verbal Reasoning ‣ Assertion and Reason See What Others Are Saying!
  • Question

  • Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion(A) : Graphite is slippery and used as a lubricant. Reason (R) : Graphite has free electrons.


  • Options
  • A. Both A and R are true and R is the correct explanation of A.
  • B. Both A and R are true but R is NOT the correct explanation of A.
  • C. A is true but R is false.
  • D. A is false but R is true.

  • Correct Answer
  • Both A and R are true but R is NOT the correct explanation of A. 

    Explanation

    Graphite possesses a layer structure with two successive layers held by weak forces and able to slide over one another. So, graphite is slippery and this property finds its use as a lubricant. In graphite, each carbon atom is linked to three other carbon atoms while one electron in the carbon atom is delocalised. So, graphite has free electrons 

     

     

    • More questions

    • 1. Choose the word which is different from the rest.

    • Options
    • A. Bajra
    • B. Mustard
    • C. Rice
    • D. Wheat
    • E. Barley
      • Discuss
    • 2. Find the odd one out:

    • Options
    • A. 263
    • B. 111
    • C. 242
    • D. 551
      • Discuss
    • 3. Find the odd one out:

    • Options
    • A. 21
    • B. 69
    • C. 81
    • D. 83
      • Discuss
    • 4. 16 : 56 :: 32 :?

    • Options
    • A. 96
    • B. 112
    • C. 120
    • D. 128
      • Discuss
    • 5. 8 : 24 ::? : 32

    • Options
    • A. 5
    • B. 6
    • C. 10
    • D. 8
      • Discuss
    • 6. 
      'Uneasy' is to 'Quite" as 'Fit' is to

    • Options
    • A. Proper
    • B. Suitable
    • C. Pertinent
    • D. Unfit
      • Discuss
    • 7. 
      NA

    • Options
    • A. Desire
    • B. Hope
    • C. Want
    • D. Belief
      • Discuss
    • 8. 
      Statement :
      1. Some clerks are poor;
      2. A is poor
      Conclusion :
      I. A is clerk.
      II. A has a large family.

    • Options
    • A. Both conclusions I and Ii
    • B. Only conclusion II
    • C. Only conclusion I follows.
    • D. Neither conclusion I nor conclusion Ii follows.
      • Discuss
    • 9. 
      Ant : Fly : Bee

    • Options
    • A. Termite
    • B. Insect
    • C. Lizard
    • D. Small
      • Discuss
    • 10. 
      NA

    • Options
    • A. Radium
    • B. Thorium
    • C. Sodium
    • D. Uranium
      • Discuss

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