1996 General Studies, all questions

UPSC Prelims 1996 · General Studies

Question 101: Science and Technology

Which one of the following is NOT an essential micronutrient for plants?

aBoron
bZinc
cSodium
dCopper

AnswerThe answer is (c).

Boron, zinc and copper are essential micronutrients for plants: needed in very small amounts, their absence causes deficiency diseases. Sodium is not essential for most plants, though it helps some, such as salt-tolerant species. Remember: plant micronutrients are iron, manganese, zinc, copper, boron, molybdenum, chlorine and nickel.

Why each option is right or wrong
  • (a) Boron is an essential micronutrient for plants.
  • (b) Zinc is an essential micronutrient for plants.
  • (c) Right: sodium is not an essential micronutrient for most plants.
  • (d) Copper is an essential micronutrient for plants.

Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 1996, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.