Our EnvironmentPractice Questions & MCQs

Q1. In a school activity, biodegradable and non-biodegradable wastes are buried in moist soil and dug up every 15 days. What does this activity help us observe?

• A.That biodegradable waste decomposes while non-biodegradable waste does not
• B.That all the waste disappears completely within 15 days
• C.That waste becomes more visible when it is buried
• D.That burying waste prevents any kind of decomposition

Answer: A. That biodegradable waste decomposes while non-biodegradable waste does not

Q2. If all the waste we generate is biodegradable, will this have no impact on the environment?

• A.Yes
• B.No
• C.It depends on the type of waste
• D.It will have a positive impact

Answer: B. No

NCERT fact (biology, chapter 'Our Environment'): No. Why option B fits - Biodegradable wastes can still cause problems if they are not disposed of properly. Distractor analysis: option A) 'Yes' fails since Biodegradable wastes can still cause problems if they are not disposed of properly; option C) 'It depends on the type of waste' misses the point - While it's true that different types of waste may have different impacts, the question is asking about the impact of biodegradable waste in general. Final answer - B) No.

Q3. Which of the following is a renewable source of energy?

• A.Solar energy
• B.Coal
• C.Petroleum
• D.Natural gas

Answer: A. Solar energy