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Assertion (A): Reduction firing is more easily achieved in a fuel-fired kiln than in an electric one.
Reason (R): Restricting the air to a burner produces a reducing atmosphere directly.

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

Answer: D

Both are true and the reason gives the mechanism: combustion provides the reducing species as a by-product of running rich, whereas an electric kiln must have a gas introduced deliberately and its elements suffer for it.

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