NEET Chemistry Environmental Chemistry Questions Solved


Green chemistry means such reactions which

(a) produce colour during reactions

(b) reduce the use and production of hazardous chemicals

(C) are related to the depletion of ozone layer

(d) study the reactions in plants

(b) Green chemistry means, the production of chemicals of our daily needs by using such reactions and chemical processes which neither use toxic chemicals, nor emit such chemicals into atmosphere. Thus, green chemistry is an alternative tool for reducing pollution. 

Difficulty Level:

  • 5%
  • 66%
  • 14%
  • 17%
NEET - 2014

Which one of the following is not a common component of photochemical smog?

(a) Ozone

(b) Acrolein

(c) Peroxyacetyl nitrate

(d) Chlorofluorocarbons

Among the given, chlorofluorocarbons are the compounds that are responsible for ozone depletion which degrades ozone into molecular oxygen. It is not a component of photochemical smog.

While other given compounds are the main components of photochemical smog.

Difficulty Level:

  • 24%
  • 29%
  • 13%
  • 36%
NEET - 2012

Which one of the following statements regarding photochemical smog is not correct?

(a) Carbon monoxide does not play any role in photochemical smog formation

(b) Photochemical smog is an oxidising agent in character

(c) Photochemical smog is formed through photochemical reaction involving energy

(d) Photochemical smog does not cause irritation in eyes and throat

(d) Photochemical smog is formed in warm and sunny climate during day time by the action of sunlight on primary pollutants. It contains nitrogen oxides , ozone, PAN etc., which are oxidising in nature. So, photochemical smog is an oxidising agent in character. It causes irritation in eyes and throat.

Difficulty Level:

  • 16%
  • 13%
  • 15%
  • 57%
NEET - 2011

Which one of the following statements is not true?

(a) Concentration of DO below 6 ppm is good for the growth of fish

(b) Clean water would have a BOD value of less than 5 ppm

(c) Oxides of sulphur, nitrogen and carbon arc the most widespread air pollutant

(d) pH of drinking water should be between 5.5-9.5

Growth of fish is inhibited if concentration of DO is below 6 ppm.

Difficulty Level:

  • 24%
  • 18%
  • 13%
  • 47%
NEET - 2008

Green chemistry means such reactions which

(a) produce colour during reactions

(b) reduce the use and production of hazardous chemicals

(c) are related to the depletion of ozone layer

(d) study the reactions in plants

Green chemistry involves such reactions which reduce the use and production of hazardous or toxic chemical to reduce pollution from environment.

Difficulty Level:

  • 3%
  • 70%
  • 13%
  • 16%