Chemistry Question

Q16. Which one is the most reactive halogen
(a) Iodine
(b) Bromine
(c) Fluorine
(d) Chlorine

Q17. The elements with atomic numbers 9, 17, 35, 53, 85 are all
(a) Heavy metals
(b) Noble gases
(c) Light metals
(d) Halogens

Q18. Decrease in atomic number is observed during
(a) Alpha Emission
(b) Electron Capture
(c) Position Emission
(d) All of the above

Q19. Who modified Bohr's theory by introducing elliptical orbits for electron path
(a) Hund
(b) Thomson
(c) Rutherford
(d) Sommerfeld

Q20. Which one of the following is most electronegative
(a) Carbon
(b) Silicon
(c) Lead
(d) Tin

Q21. Hydrogen bonding is maximum in
(a) Ethanol
(b) Diethyl Ether
(c) Ethyl Chloride
(d) Triethyl Amine

Q22. In ice, the number of hydrogen bonds per water molecule is
(a) 1
(b) 2
(c) 4
(d) 8

Q23. In nuclear reactors heavy water is used as a
(a) Fuel
(b) Projectile
(c) Moderator
(d) Arestor

Q24. Which gas is most stable at room temperature
(a) H2
(b) N2
(c) F2
(d) O2

Q25. Marie Curie received Nobel Prize in Chemistry
(a) 1904
(b) 1908
(c) 1911
(d) 1915

Q26. Which one is not a pure form of carbon
(a) Coal
(b) Graphite
(c) Diamond
(d) Gold

Q27. Which one is the purest form of carbon
(a) Coal
(b) Graphite
(c) Diamond
(d) Iron

Q28. The nucleus of an atom consists of
(a) Protons and Neutrons
(b) Neutrons and Electrons
(c) Electrons only
(d) None of the above

Q29. Which one is the most reactive gaseous element
(a) Chlorine
(b) Bromine
(c) Iodine
(d) Flourine

Q30. Total number of halogen elements found in the periodic table is
(a) 3
(b) 5
(c) 8
(d) 13

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