Multiple choice

Consider the following statements:

  1. Hot air balloon uses propane gas to heat up the air in the envelope to move the balloon off the ground and into the air.
  2. Hypothalamus, present near the liver, balances body temperature.

Which of the given statements is/are true?

  1. Only (1)

  2. Only (2)

  3. Both (1) and (2)

  4. Neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement (1) is correct. Yes, the burner of hot air balloon uses propane gas to heat up the air in the envelope to move the balloon off the ground and into the air because it is a colourless, odourless and non-toxic gas. It is supplied commercially with an added odorant (usually ethylmercaptan) to assist detection by smell. Statement (2) is incorrect. Yes, hypothalamus balances body temperature, but it is present in brain. Hypothalamus is also called as 'balancing organ'.

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