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  9. Q14

PPSC PCS 2015 · Question 14 of 100

Consider the following statements: 1. Radon is the heaviest gas. 2. Astatine is a rarer element on Earth. 3. Graphite is an allotrope of carbon. Which among the above statement (s) is/are correct?

Science & Tech

  1. A1 and 2
  2. B1 and 3
  3. COnly 3
  4. DAll of the aboveCorrect

Answer: D. All of the above

Explanation

Radon-222 is the heaviest naturally occurring gas, astatine is the rarest naturally occurring element, and graphite is an allotrope of carbon — all three statements are correct.

Source: https://cdn.mindspritesolutions.com/examrace/SPSC/Punjab-PSC/Punjab-PSC-Past-Papers/Punjab-Civil-Service-2015-Official-Paper-1-Part-1.pdf

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