Paper 1 · People, Development and Environment
UGC NET June 2023 (13.06.2023) Shift-II
Which of the following are classified as hazardous substances?
- Activated substances
- Ignitable substances
- Corrosive substances
- Reactive substances
- Toxic substances
A1, 2, 3 & 4 only
B2, 3, 4 & 5 only ✓ Correct
C1, 3, 4 & 5 only
D1, 2, 4 & 5 only
Correct answer: (B) 2, 3, 4 & 5 only — Ignitable, corrosive, reactive and toxic substances are hazardous, so the answer is 2, 3, 4 and 5.
Explanation
★Ignitable, corrosive, reactive and toxic substances are hazardous, so the answer is 2, 3, 4 and 5.
★A hazardous substance is any material that can harm people directly or indirectly.
★Ignitable substances catch fire easily, posing a fire hazard.
★Corrosive substances can destroy living tissue or materials on contact.
★Reactive substances are unstable and can explode or release dangerous gases.
★Toxic substances cause poisoning or injury when inhaled, swallowed or absorbed.
★Activated substances in item 1 is not a standard hazardous-waste category, so it is excluded.
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