Kerala KAS 2020 · Question 45 of 70

With reference to the cause of ozone layer depletion which of the following statement is incorrect?

Environment

AA number of naturally occurring substances like Hydrogen Oxide (HOx), Methane (CH4), Hydrogen Gas (H2), Nitrogen Oxides (NOx) causes ozone layer depletion
BChlorine Monoxide (ClO); during volcanic eruptions, significant amount of chlorine may be released in the stratosphere which causes ozone layer depletion
CTiny particulate matter in the stratosphere, known as stratospheric aerosols, the only matter protect ozone layer depletionCorrect
DAny event, which release chlorine atoms into the atmosphere, can cause severe ozone destruction

Answer: C. Tiny particulate matter in the stratosphere, known as stratospheric aerosols, the only matter protect ozone layer depletion

Stratospheric aerosols actually contribute to ozone depletion (e.g., after volcanic eruptions); they do not protect the ozone layer.

Source: Kerala PSC KAS Officer 016/2020 official paper (22-Feb-2020), provisional answer key

Practice the full Kerala KAS 2020 paper

Timed test with all 70 questions, just like the real exam.

Kerala KAS 2020 · Question 45 of 70

Environment

AA number of naturally occurring substances like Hydrogen Oxide (HOx), Methane (CH4), Hydrogen Gas (H2), Nitrogen Oxides (NOx) causes ozone layer depletion
BChlorine Monoxide (ClO); during volcanic eruptions, significant amount of chlorine may be released in the stratosphere which causes ozone layer depletion
CTiny particulate matter in the stratosphere, known as stratospheric aerosols, the only matter protect ozone layer depletionCorrect
DAny event, which release chlorine atoms into the atmosphere, can cause severe ozone destruction

Stratospheric aerosols actually contribute to ozone depletion (e.g., after volcanic eruptions); they do not protect the ozone layer.

Source: Kerala PSC KAS Officer 016/2020 official paper (22-Feb-2020), provisional answer key

Practice the full Kerala KAS 2020 paper

Timed test with all 70 questions, just like the real exam.