Chemistry I X Hydrogen & Water

Chemistry I X Hydrogen & Water

1. The formula of water gas is:

a) H2 + CO2
b) CO + H2
c) He + CO
d) O2 + CO
2. When a piece of Sodium is introduced in water than:

a) None of these
b) Hydrogen gas is evolved
c) Oxygen gas is evolved
d) Both Hydrogen and Oxygen evolved
3. Which one of the following is the purest form of water:

a) Distilled Water
b) Treated Water
c) Natural Water
d) Rain Water
4. Carbon black is an allotropic form of:

a) Carbon
b) Hydrogen
c) Oxygen
d) Sulphur
5. The isotopic forms of hydrogen are:

a) Two types
b) Five types
c) Three types
d) Four types
6. When methane (CH4) reacts with water in the presence of nickel at 900 deg C then:

a) Carbon monoxide is produced
b) Hydrogen gas id produced
c) Water gas is produced
d) Ethane is produced
7. Deuterium (1H2or D) reacts with oxygen to form:

a) Soft water
b) Water gas
c) Heavy water
d) Hard water
8. The most abundant compound of hydrogen on earth is :

a) Water
b) Petroleum
c) Carbon hydrate
d) Natural gas
9. 18 g / mol is the molar mass of:

a) Ice
b) Water
c) All of above
d) Steam
10. The density of liquid water at 0 deg C is:

a) 1.00 g / cm3
b) 0.889 g / cm3
c) 1.2 g / cm3
d) 0.998 g / cm3
11. The maximum density of water at 4 deg C is:

a) 0.918 g / cm3
b) 1.04g / cm3
c) 0.998 g / cm3
d) 1.00 g / cm3
12. Permanent hard water contains compounds:

a) MgCl2 and CaCO3
b) Carbonates of Ca and Mg
c) Hydrogen carbonates of Ca and Mg
d) Chlorides and Sulphates of Ca and Mg
13. Temporary hard water contains compounds:

a) Hydrogen carbonates of Ca and Mg
b) CaCO3 and MgSO4
c) Sulphates and chlorides of Ca and Mg
d) MgCl2 and CaCO3
14. Hydrogen constitutes only:

a) 0.01 % of Earth's mass
b) 0.998 % of Earth's mass
c) 0.5 % of Earth's mass
d) 0.89 % of Earth's mass
15. The anomalous behavior of water is observed between:

a) 0 deg C to 6 deg C
b) 0 deg C to 10 deg C
c) 0 deg C to - 4 deg C
d) 0 deg C to 4 deg C
16. The chemical formula of slaked lime is:

a) Ca(HCO3)2
b) CaSO4
c) Ca(OH)2
d) CaCO3
17. The electro-negativity of hydrogen is:

a) 3.2
b) 4.0
c) 2.1
d) 1.4
18. In diatomic molecular state the molecular mass of hydrogen is:

a) 2.0 a.m.u.
b) 2.016 a.m.u.
c) 1.06 a.m.u.
d) 1.00 a.m.u.
19. Which one of the following is the nuclear fuel consumed by sun and other stars:

a) Hydrogen
b) Oxygen
c) Sulphur dioxide
d) Nitric Oxide
20. The physical association of water with ions is called :

a) Hydrolysis
b) Hydrogenation
c) Hydration
d) Solvation
21. The mass number of Tritium (1H3 or T) is:

a) 2
b) 1
c) 3
d) 4
22. The ionization energy of hydrogen is:

a) 13.5 e.v
b) 14 e.v
c) 10.4 e.v
d) 11.4 e.v
23. The percentage of naturally occurring hydrogen in deuterium (1H2 or D) is:

a) 0.014%
b) 2.00%
c) 0.001%
d) 0.0156 %
24. Which gas is also called as " Inflammable Air " :

a) Hydrogen
b) Oxygen
c) Carbon dioxide
d) Nitrogen
25. The percentage of free hydrogen in protium (1H1) is:

a) 89.98%
b) 99.98%
c) 100%
d) 98.99%
26. Which of the following will convert brownish solution of FeCl3 into greenish solution of FeCl2:

a) K2Cr2O7
b) H2O2
c) KMnO4
d) [H]
27. About ____ percent naturally occurring hydrogen contains Tritium (1H3 or D):

a) 2E-15%
b) 3E-15%
c) 4E-15%
d) 1E-15%
28. Carbon monoxide (CO) liquefies, when water gas is cooled up to:

a) 200 deg C
b) -200 deg C
c) -100 deg C
d) 100 deg C
29. Isotopes of an element have different :

a) Atomic numbers
b) Number of neutrons
c) Number of protons
d) Number of electrons
30. The lightest & the first element in the periodic table is:

a) Sodium
b) Hydrogen
c) Magnesium
d) Calcium
31. In Clark's method which of the following is used to remove the hardness of water:

a) Washing Soda
b) Sodium-Zeolite
c) Caustic Soda
d) Slaked lime
32. Nascent Hydrogen means:

a) Molecular hydrogen
b) Inert hydrogen
c) Inflammable air
d) Newly born hydrogen
33. When hydrogen reacts with Carbon monoxide in the presence of ZnO-Cr2O3 at high pressure and 400 deg C, then:

a) Ethyl alcohol is formed
b) Ether is formed
c) Ethane is formed
d) Methyl alcohol is formed
34. The crystals of salts which contain water of crystallization are known as:

a) Molecular crystals
b) Hydrates
c) Ionic crystals
d) Covalent crystals
35. The anomalous behavior of water can be explained by:

a) Dipole-dipole interactions
b) Covalent bonding
c) Hydrogen bonding
d) Ionic bonding
36. Ion-Exchange method is used to remove:

a) Permanent hardness from water
b) Impurities from water
c) Heavy water from water
d) Temporary hardness from water
37. The hydrogen gas was discovered by:

a) Lord Kelvin
b) Lavoisier
c) Henry Cavendish
d) Robert Boyles
38. The boiling point of pure water is:

a) 101 deg C
b) 100 deg C
c) 104 deg C
d) 99 deg C
39. The half life of the radio-active isotope of hydrogen is:

a) 10.5 years
b) 8.5 years
c) 12.5 years
d) 7.5 years
40. The production of vegetable ghee from edible oils is an example of:

a) Halogenation
b) Hydrogenation
c) Hydration
d) Dehydration
41. How much percent of the universe is composed of hydrogen:

a) 60 %
b) 80 %
c) 50 %
d) 70 %
42. Nascent hydrogen is more reactive than molecular hydrogen because:

a) It is in atomic state
b) Due to the lesser amount of its energy
c) It is lighter in mass
d) It is stable
43. The bond dissociation energy of (H - H) is:

a) 100 K.cal / mol
b) 104 K.cal / mol
c) 110 K.cal / mol
d) 90 K.cal / mol
44. The water which produces good lather with soap is called :

a) Hard water
b) Heavy water
c) Soft water
d) Portable water
45. The formula of quick lime is:

a) Ca (OH)2
b) CaCO3
c) CaO
d) CaSO4
46. In the earth crust hydrogen is the:

a) Second most abundant element
b) Tenth most abundant element
c) Ninth most abundant element
d) Fourth most abundant element
47. The density of ice at 0 deg C is:

a) 0.918 g / cm3
b) 1.00 g / cm3
c) 0.89 g / cm3
d) 0.779 g / cm3
48. Which one of the following is used as moderator in nuclear fission power reactors for slowing the speed of neutrons:

a) Distilled water
b) Permanent hard water
c) Heavy water
d) Temporary hard water
49. Hydrogen gas is commercially prepared by the thermal decomposition of:

a) Ethene
b) Water
c) Water gas
d) Methane
50. The freezing point of pure water is:

a) -40 deg C
b) -30 deg C
c) 0 deg C
d) -2 deg C
51. Water gas is a mixture of hydrogen and:

a) Carbon monoxide
b) methane
c) Carbon dioxide
d) Carbon disulphide
52. In Bosch Process, Carbon monoxide in water gas is oxidizes to:

a) Carbon dioxide
b) Carbon disulphide
c) Carbon black
d) Methane
53. Hydrogen gas burns in air with a:

a) Greenish flame
b) Blue flame
c) Yellow flame
d) Red hot flame
54. Which of the following is most constituting abundant compound of hydrogen on earth:

a) Hydrogen peroxide (H2O2)
b) Sodium hyride (NaH)
c) Water (H2O)
d) Methane (CH4)
55. When steam is passed over red hot coke at 1000 deg C, then:

a) Hydrogen is formed
b) Carbon monoxide is formed
c) Water gas is formed
d) None of these
 
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