PREVIOUS YEAR QUESTIONS (PRELIMS)
Q.1 ) The acidification of oceans is increasing. Why is this phenomenon a cause of concern? (IAS/2012)
- The growth and survival of calcareous phytoplankton will be adversely affected.
- The growth and survival of coral reefs will be adversely affected.
- The survival of some animals that have phytoplanktonic larvae will be adversely affected.
- The cloud seeding and formation of clouds will be adversely affected.
Which™ of the statements given above is/are correct?
A. 2 only
B. 1 and 3 only
C. 1, 2 and 3 only
D. 1, 2, 3 and 4
Answer: C
Q.2) Ozone layer depletion is a major phenomenon in: (CAPF/2015)
A. Troposphere
B. Stratosphere
C. Thermosphere
D. Exosphere
Answer: B
Q.3) The depletion in atmospheric ozone layer in the last century was due to: (CAPF/2023)
A. Carbon monoxide
B. Chlorofluorocarbon
C. Methane
D. Pesticides
Answer: B
Q.4) Ozone layer is formed due to reactions of: (SSC)
A. Carbon dioxide and layers of atmosphere
B. Cosmic rays and layers of atmosphere
C. Infrared rays and ultraviolet rays
D. Oxygen and ultraviolet rays
Answer: D
