Chemistry PYQ 39 of 152 · Reactions & Catalysis

Detect the odd one.

  1. ARipening of fruit
  2. BSetting of cement
  3. CBurning of coal
  4. DMore than one of the above
  5. ENone of the above

68th BPSC

Show answer and explanation

Correct answer: (e) None of the above

Explanation

Ripening of fruit and burning of coal are chemical changes – they form new substances and are irreversible.

Setting of cement (hydration) is also an irreversible chemical change, so all three are alike and none is the odd one.

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