Question

4. What is the main hydrocarbon component of natural gas? A. ethane
B. ethene C. methane

7.The fact that alpha particles cannot travel very far trough body tissues is the main reason that radioactive tracers use to detect diseases in internal organs emit beta particles or gamma rays.
A. true B. false

8.A wax is an ester of a long-chain fatty acid and a long-chain alcohol. A. true
B. false

Answer 1

Answer:

Q.4) C. Methane

Q.7) A. False

Q.8) A. True

Answer 2

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