JAMB and WAEC Chemistry questions: Environmental pollution

32 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Environmental pollution· JAMB

   Photochemical smog forms when sunlight acts on

   • Aargon
   • Bhelium
   • Cpure oxygen
   • Dnitrogen oxides and hydrocarbons from vehicle exhausts

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   Explanation and discussion

2. Question 2· Environmental pollution· JAMB

   Smog is a mixture of

   • Asnow and rain
   • Bsand and dust
   • Csteam and oxygen
   • Dsmoke and fog

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   Explanation and discussion

3. Question 3· Environmental pollution· WAEC

   Gas flaring at oil fields in the Niger Delta adds mainly which greenhouse gas to the atmosphere?

   • Aoxygen
   • Bcarbon(IV) oxide
   • Cnitrogen
   • Dargon

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   Explanation and discussion

4. Question 4· Environmental pollution· JAMB

   Which gas in car exhaust fumes combines with haemoglobin and reduces the blood's ability to carry oxygen?

   • Awater vapour
   • Bcarbon(IV) oxide
   • Cnitrogen
   • Dcarbon(II) oxide

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   Explanation and discussion

5. Question 5· Environmental pollution· JAMB

   Gas flaring in the Niger Delta releases large amounts of

   • Acarbon(IV) oxide into the atmosphere
   • Boxygen into the soil
   • Cpure water vapour only
   • Dnitrogen into rivers

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   Explanation and discussion

6. Question 6· Environmental pollution· WAEC

   Carbon monoxide is poisonous because it

   • Ais acidic
   • Bcombines with haemoglobin and stops it carrying oxygen
   • Chas a strong smell
   • Ddissolves in the blood as an acid

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   Explanation and discussion

7. Question 7· Environmental pollution· WAEC

   Domestic generators should not be run indoors because they release

   • Aoxygen
   • Bcarbon monoxide, which can kill silently
   • Cnitrogen only
   • Dwater vapour only

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   Explanation and discussion

8. Question 8· Environmental pollution· JAMB

   Which gas is mainly responsible for acid rain?

   • Acarbon dioxide
   • Bsulphur(IV) oxide
   • Coxygen
   • Dnitrogen

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   Explanation and discussion

9. Question 9· Environmental pollution· WAEC

   Gas flaring in the Niger Delta releases

   • Aclean water
   • Bpure oxygen
   • Ccarbon dioxide and pollutants into the atmosphere
   • Dfertiliser

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   Explanation and discussion

10. Question 10· Environmental pollution· WAEC

    The main cause of water pollution in many Nigerian rivers is

    • Aphotosynthesis
    • Brainfall
    • Cevaporation
    • Ddumping of untreated sewage and refuse

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    Explanation and discussion

11. Question 11· Environmental pollution· WAEC

    Chlorofluorocarbons (CFCs) damage which layer of the upper atmosphere?

    • Awater vapour
    • Bozone
    • Ccarbon(IV) oxide
    • Dargon

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    Explanation and discussion

12. Question 12· Environmental pollution· WAEC

    Carbon(II) oxide is poisonous because it

    • Adestroys lung tissue
    • Bdissolves in blood to form an acid
    • Ccombines with haemoglobin and stops it carrying oxygen
    • Dblocks the nose

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    Explanation and discussion

13. Question 13· Environmental pollution· JAMB

    Which of the following wastes is biodegradable?

    • Akitchen food waste
    • Bplastic bags
    • Cglass bottles
    • Daluminium cans

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    Explanation and discussion

14. Question 14· Environmental pollution· JAMB

    Depletion of the ozone layer is mainly caused by

    • Aoxygen
    • Bcarbon(IV) oxide
    • Cchlorofluorocarbons (CFCs)
    • Dwater vapour

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    Explanation and discussion

15. Question 15· Environmental pollution· WAEC

    Which gas is mainly responsible for the greenhouse effect?

    • Acarbon(IV) oxide
    • Bnitrogen
    • Coxygen
    • Dargon

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    Explanation and discussion

16. Question 16· Environmental pollution· WAEC

    Acid rain damages buildings made of limestone because the acid

    • Areacts with calcium trioxocarbonate(IV)
    • Bfreezes in the stone
    • Cdissolves the cement only
    • Dadds water to the stone

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17. Question 17· Environmental pollution· JAMB

    Chlorofluorocarbons (CFCs) were widely used in

    • Arefrigerators and aerosol sprays
    • Bfertilisers
    • Ccement
    • Dsteel making

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    Explanation and discussion

18. Question 18· Environmental pollution· JAMB

    Eutrophication of lakes is caused mainly by

    • Aoil spills
    • Bfertilisers rich in nitrates and phosphates washed into the water
    • Cdust
    • Dsand

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19. Question 19· Environmental pollution· WAEC

    Which of the following gases contributes to acid rain?

    • AArgon
    • BNitrogen
    • COxygen
    • DSulphur dioxide

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    Explanation and discussion

20. Question 20· Environmental pollution· WAEC

    Acid rain is caused mainly by

    • Aozone
    • Bcarbon monoxide
    • Cmethane
    • Dsulphur dioxide and oxides of nitrogen

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    Explanation and discussion