Question

Match the column I with column II
COLUMN I | COLUMN II
A. Ozone thickness | i. UV rays
B. CFC | ii. Refrigerator
C. El Nino effect | iii. Temperature increase
D. Skin cancer | iv. Dobson unit

  • A. i, B. ii, C. iii, D. iv
  • A. ii, B. iii, C. iv, D. i
  • A. iv, B. ii, C. iii, D. i
  • A. iii, B. iv, C. ii, D. i

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Answer

The correct option is C:

A- iv, B- ii, C- iii, D- i

Here's the detailed explanation:

  • Dobson unit is a measure of the thickness of ozone. One Dobson unit represents a thickness of 0.01 mm of ozone at standard temperature and pressure.

  • Chlorofluorocarbons (CFCs) are gases released by refrigerators and air conditioners. They are major contributors to ozone depletion and the formation of the ozone hole.

  • The El Nino effect is characterized by the periodic development of warm ocean currents, resulting in an increase in sea surface temperatures.

  • Skin cancer is primarily caused by overexposure to ultraviolet (UV) radiation.

Therefore, matching the columns correctly:

  • A (Ozone thickness) matches with iv (Dobson unit).
  • B (CFC) matches with ii (Refrigerator).
  • C (El Nino effect) matches with iii (Temperature increase).
  • D (Skin cancer) matches with i (UV rays).

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