10 Questions MCQ Test Science & Technology for UPSC CSE - Our Environment - 1
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Which of the following groups does not contain only biodegradable items ?
Detailed Solution for Our Environment - 1 - Question 3
Correct Answer :- b
Explanation : A Non-Biodegradable material can be defined as a kind of substance which cannot be broken down by natural organisms and acts as a source of pollution. ... Non-biodegradable wastes are those who cannot be decomposed or dissolved by natural agents.
Detailed Solution for Our Environment - 1 - Question 7
Grass, goat and human constitute a food chain. Grass is an autotroph i.e. it produces its own food. Grass is eaten by goat which is a herbivore. Human beings are omnivores (they eat both meat and plant foods) so they eat meat of goat. Hence this is a food chain.
Detailed Solution for Our Environment - 1 - Question 8
Nylon is a man made fibre it is actually a polymer interconnected by a chain of smaller unit hence the strong intermolecular force between this type of fibre make the bacteria mainly the decomposers to take a long time to decompose this since nylon take a million of year for decomposition it is non biodegradable where as one we talk about wool animal bones tea leaves they all are biodegradable hence the correct option is B
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