Environmental Chemistry MCQs for MDCAT Practice

Chemistry section, Environmental Chemistry chapter. Sample questions from past PMC papers.

1. Question 1
   We used Pb(C2H5)4in the gasoline to reduce:
   • A.Consumption of fuel
   • B.Price of fuel
   • C.The octane number of fueL
   • D.Knocking of engine
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
2. Question 2
   The substance for the separation of isotopes is first converted into the:
   • A.Neutral state
   • B.Free state
   • C.Vapour state
   • D.Charged state
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
3. Question 3
   Fluorosis, the bone disease, is caused by the presence of:
   • A.Pesticides in water
   • B.Fluorides in water
   • C.Carbon monoxide in air
   • D.Sulphur dioxide in air
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
4. Question 4
   The most abundant element in the earth crust is:
   • A.O
   • B.Si
   • C.Al
   • D.Fe
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
5. Question 5
   Temporary hard water is softened on an industrial scale by adding
   • A.Mg(OH)2
   • B.Ca(OH)2
   • C.KOH
   • D.NaOH
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
6. Question 6
   Which of the following statement is not correct with respect to radioactive pollutants?
   • A.Carcinoma and breast cancer
   • B.Leukemia
   • C.Increases biological immune system
   • D.Somatic and genetic disorders
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
7. Question 7
   Which of the following causes water pollution?
   • A.Smoke/fly ash
   • B.Automobile exhausts
   • C.Aeroplanes
   • D.Silt and pesticides
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
8. Question 8
   Urban smog results in the formation of peroxyacetyl nitrate which causes damage to
   • A.rubber tyres.
   • B.kidney tissues.
   • C.the nervous system.
   • D.plant life.
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.