Waste Management — Homi Bhabha Class 9 Biology MCQs with Solutions
Free Homi Bhabha Class 9 Biology Waste Management MCQs with step-by-step solutions (10 questions). Part of Ecosystem & Environmental Management. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Waste Management · medium · theory
Wastes that can be broken down by microorganisms into harmless substances are called:
A. non-biodegradable
B. radioactive
C. biodegradable ✓ Correct
D. plastic
Solution: Biodegradable wastes (e.g. food scraps, paper) are decomposed by microbes.
Q2 — Waste Management · hard · theory
Which of the following is a NON-biodegradable waste?
A. Cotton cloth
B. Vegetable peels
C. Plastic bag ✓ Correct
D. Paper
Solution: Plastics are not broken down by microbes and persist in the environment.
Q3 — Waste Management · medium · theory
The method of converting biodegradable kitchen and garden waste into manure is called:
A. recycling of metals
B. landfilling
C. composting ✓ Correct
D. incineration
Solution: Composting lets microbes decompose organic waste into nutrient-rich manure.
Q4 — Waste Management · hard · theory
The "three Rs" recommended for managing waste are:
A. Reduce, Reuse, Recycle ✓ Correct
B. Run, Rest, Repeat
C. Read, Write, Recite
D. Reduce, Remove, Reject
Solution: Reduce, Reuse and Recycle help minimise waste and conserve resources.
Q5 — Waste Management · medium · theory
Household waste is often separated into different coloured bins in order to:
A. confuse people
B. segregate biodegradable and non-biodegradable waste ✓ Correct
C. increase the waste
D. make it look colourful
Solution: Segregation at source makes recycling and composting easier and more efficient.
Q6 — Waste Management · hard · theory
Recycling of materials like paper and metal is beneficial because it:
A. wastes energy
B. increases pollution
C. uses more raw material
D. saves natural resources and reduces waste ✓ Correct
Solution: Recycling conserves resources, saves energy and reduces the amount of waste dumped.
Q7 — Waste Management · easy · theory
Which of the following is a biodegradable waste?
A. Aluminium can
B. Plastic bottle
C. Glass piece
D. Vegetable peels ✓ Correct
Solution: Vegetable peels are organic matter that decomposer microorganisms can break down naturally. Plastic, glass, and aluminium are non-biodegradable and persist for a very long time.
Q8 — Waste Management · easy · theory
In the common two-bin waste segregation system used in India, wet or biodegradable kitchen waste should be put in the bin of colour:
A. Blue
B. Green ✓ Correct
C. Black
D. Red
Solution: Green bins are meant for wet, biodegradable waste (like food scraps), while blue bins are for dry, recyclable waste such as paper, plastic, and metal.
Q9 — Waste Management · medium · theory
In the waste-management hierarchy "Reduce, Reuse, Recycle", which action is the MOST effective because it prevents waste from being created in the first place?
A. Incinerate
B. Reuse
C. Recycle
D. Reduce ✓ Correct
Solution: Reduce is the most preferred step because using fewer materials in the first place avoids waste at its source. Reuse and recycle deal with waste only after it has already been produced.
Q10 — Waste Management · hard · theory
Assertion (A): Dumping large amounts of biodegradable waste in landfills contributes to global warming. Reason (R): Anaerobic decomposition of organic waste in landfills releases methane, a greenhouse gas.
A. A is true but R is false
B. Both A and R are true and R is the correct explanation of A ✓ Correct
C. Both A and R are true but R is not the correct explanation of A
D. A is false but R is true
Solution: Buried organic waste decomposes without oxygen (anaerobically) and releases methane, which is a potent greenhouse gas. This warming effect makes R the correct explanation of A.