CHEMISTRY QUESTIONS ANSWERS
Q1. Liquid Nitrogen boils at
Ans : 77 kelvin
Q2. Total number of elements in the Periodic table
Ans: 118
Q 3. Which one is the lightest element in the periodic table
Ans: Hydrogen
Q 4. Which one of the following is most electronegative
Ans: Carbon
Q 5. Hydrogen bonding is maximum in
Ans: Ethanol
Q 6. Which one is the purest form of carbon
Ans: Diamond
Q 7. Which one is the naturally occuring heaviest element
Ans: Uranium
Q 8. What is the mass percentage of oxygen in carbon dioxide (CO2)
Ans. 72.70%
Q 9. Normal rainwater is slightly acidic due to the presence of
Ans: Carbon dioxide
Q 10. Which one element has the lowest electronegativity value
Ans: Francium
Q 11. What is the atomic number of mercury
Ans: 80
Q 12. Which color is produce by Arsenic during flame test
Ans : Blue
Q 13. Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure
Ans : Bromine
Q 14. In a Carbonyl group a carbon atom makes double bond with
Ans: Oxygen
Q 15. Which one is the most dense liquid from the below
Ans : Choloform
