Multiple choice

Which of the following statements are FALSE?

  1. Solid CO2 is known as dry ice.
  2. Producer gas is CO + H2.
  3. Phosgene is carbonyl chloride.
  4. Lead pencil contains 25% Pb. Select the correct answer.

  1. 1 and 2 only

  2. 1 and 3

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Producer gas is CO + N2. The core of lead pencil is made of non-toxic graphite and does not contain lead.

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