Class 12 Chemistry · Chapter 15 · Test 2
Recycling and Petrochemicals
50 MCQs
50 questions · 40 min · 50 marks
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Sample questions
The first 5 of 50. Try each one, then tap to see the answer.
Question 1
Toxicity is the extent to which a substance can:
- AHarm an organism or the environment
- BDissolve in water
- CConduct electricity
- DBurn in air
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Answer: A
A material may be toxic during production and use and disposal.
Question 2
Chromium is hazardous because it can be:
- AMagnetic
- BCarcinogenic (cause cancer)
- CRadioactive only
- DExplosive
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Answer: B
It can also be a mutagen and cause respiratory issues.
Question 3
Flammable or explosive materials are examples of:
- AHealth hazards
- BEnvironmental hazards
- CPhysical hazards
- DBiological hazards
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Answer: C
They can harm humans and forests and buildings.
Question 4
Which heavy metals are commonly found in electronics and batteries and fluorescent lights?
- ASodium and potassium
- BIron and zinc
- CCopper and gold
- DLead and mercury and cadmium
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Answer: D
They can get into the groundwater.
Question 5
Heavy metals enter the food chain mainly by:
- ALeaching into soil and groundwater and being taken up by living organisms
- BEvaporation
- CPhotosynthesis
- DRadiation
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Answer: A
They are dangerous to plants and animals and aquatic organisms.
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