The most pure form of carbon among these are?

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1. The ratio of pure gold in 18 carat gold is _______________?

   A. 0.5 B. 0.9 C. 0.8.5 D. 0.75 Submitted by: WIQAR AHMAD...

2. Human beings use _______ liters of pure oxygen per day.

   A. 550 B. 2500 C. 1,050 D. 10,000 Submitted by: Muhammad Awais Tariq...

3. Which metal is pure conductor of electricity?

   A. Copper B. Gold C. Silver D. lead Submitted by: Wajahat Ali...

4. Boiling point of pure water is __________?

   A. 90’C B.  97’C C. 100’C D. None of these Submitted by: Rafi Umar...

5. Pure limestone is called _______?

   A. Aluminum Oxide B. Calcium Carbonate C. Calcium Sulphate D. None of these Submitted by: Farhan Rana...

6. The Carbon Dioxide in the atmosphere, by volume, is_______?

   A. 0.039% B. 3.9% C. 13% D. 30%...

7. Which of the following type of Coal, has maximum carbon content?

   A. Peat B. Lignite C. Anthracite D. Bituminious Submitted by: Malik Asghar Hussain...

8. Carbon,Diamond and Graphite are together called:___________?

   A. Allotrope B. Isomers C. Isomorphs D. Isotopes Submitted by: Fahad Mehsud...

9. Carbon dioxide was discovered by_______?

   A. Niels Bohr B. Amedeo Avogadro C. Joseph Black D. None of Above Submitted by: Ali Mallah...

10. Planets having largest amount of Carbon Dioxide is ____________?

    A. Mercury B. Jupiter C. Mars D. Venus Submitted by: Sinha Amjad...