Question Bank
3 MARK --- QUESTION
4/5 MARK ----QUESTION
COURSE : DPT
SEMESTER : I
SUBJECT : Engineering Chemistry
1. If Z is the number of proton and A the number of nucleons, then the number of neutrons in an atom is
given by……………………
a) A+Z
b) A-Z
c) Z-A
d) none of these
2. The mass number and atomic number of Phosphorous atom are 31 and 15 respectively. The number
of neutrons in the nucleus is……………….
3. The idea of stationary orbits was first given by Rutherford (Say True or False)
4. The maximum number of electrons that can be accommodated in an orbit is…………………..
a) 2n b) n2
c) 2n2
d) 2n+1
5. Out of the following pairs of elements which has the same number of electrons in the outermost energy level…………………….
a) helium and lithium b) boron and carbon c) carbon and nitrogen d) lithium and hydrogen
6. According to Heisenberg’s uncertainty principle, it is impossible to determine simultaneously the
position and velocity with accuracy of a small particle like electron (Say True or False)
7. The maximum number of electrons that can be accommodated in f-subshell is………………
8. Isotopes have same atomic number but different mass number (Say True or False)
9. The most electronegative element in the periodic table is…………………..
10. …………………… is an electronic configuration of copper(Cu-atomic number 29).
a) 1s2
2s2
2p6
3s2
3p6
4s2
3d9
b) 1s2
2s2
2p6
3s2
3p6
4s1
3d10
c) 1s2
2s2
2p6
3s2
3p5
4s2
3d10 d) 1s2
2s2
2p6
3s2
3p5
4s2
3d9
11. Which one of the following is the most polar………………………
a) H-F
b) H-Cl
c) H-Br
d) H-I
12. In a N2 molecule there are one sigma and two pi bonds (Say True or False)
13. …………………..is formed by head to head overlapping of atomic orbitals.
14. The high boiling point of water is due to ………………….
a) Covalent bonding
b) Ionic bonding
c) Hydrogen bonding
d) Coordinate bonding
15. NH4Cl molecule contains only ionic bonding (Say True or False)
16. Acetic acid is a weak acid because it has………………………
a) high molecular mass
b) highly unstable
c) high ionisation
d) low ionization
17. According to Lowry-Bronsted concept, a base is a substance that…………………..
a) accepts a proton
b) releases a proton
c) accepts a electron
d) releases a electron
18. Solution is a homogeneous mixture of solute and solvent (Say True or False)
19. The ionic product of water is ……………………
20. Molecules or ions that can behave both as Bronsted acid and base are called……………….
a) Monoprotic acids
b) polyprotic acids
c) amphiprotic substances
d) polyprotic bases
21………………..of a solution is the number of equivalents of solute per litre of the solution.
22. In a super saturated solution, the amount of solute is more in comparison to saturated solution.
(Say True or False)
23. For the preparation of 1000 ml of 0.1 N solution of sulphuric acid, the amount of H2SO4 needed
is……………
a) 4.9 g
b) 9.8 g
c) 14.7 g
d) 19.6 g
24. pH>7, is generally called as…………………….
25. The taste of an acid is………………..
26. Polar compounds are soluble in polar solvents and Non-Polar compounds are soluble in non-polar
solvents (Say True or False)
27. Blue litmus Paper turns red colour, if it is………………solution.
28. Red litmus paper turns blue colour, if it is…………….solution.
29. The Major quantity of the solution is called as solute (Say True or False)
30. Buffer solution is used to ………………………
a) increase the pH
b) keep the pH remains same
c) decrease the pH
d) None of these
31. Temporary Hardness of water can be removed by boiling the water. (Say True or False)
32. The degree of hardness of water is usually expressed as………………
33. Calgon, Na2[Na4(PO3)6] is used as a………………………
a) water purifier
b) water hardener
c) water softener
d) none of these
34. Magnesium sulphate creates……………………. hardness in water.
a) Carbonate
b) Total
c) Temporary
d) Permanent
35. Deionised water has______________ ions.
a) H+
b) OHc) H+
c) and OH
d) None of the above.
36. Carbonates and Bicarbonates of Ca and Mg creates _______________ hardness of water.
37. Hard water can not be used for washing purposes (Say True or False)
38. ………………is the sodium salt of higher fatty acid.
39. Permanent hardness can be removed by………………………
a) Lime soda process
b) Permutit process
c) Ion-exchange process
d) All of these
40. Ground water contains appreciable amount of calcium and magnesium salts(Say True or False)
41. The functional group of acid is……………….
a) RCOOH
b) RCOOR
c) RCHO
d) RCOR
42. Ester has pleasant fruity smell (Say True or False)
43. …………………..is not belongs to alcohol family.
a) C2H5OH
b) CH3OH
c) CH3CH2CH2OH
d) CH3OCH3
44. The functional group of ether is…………………
45. Alkyl groups has one hydrogen shortage of Alkane compounds (Say True or False)
46. ________________ property of carbon is responsible for the large number of carbon compounds .
a) Reducing
b) Catenation
c) Oxidizing
d) Hydrolysing
47. All Organic compounds mainly consist of …………………..
48. Cyclic Compounds Contain one atom(Sulphur, Oxygen, Nitrogen) other than carbon is
called………………………………
49. The general formula for alkane is………………………….
a) CnH2n+2
b) CnH2n
c) CnH2n-2
d) CnH2n+42
50. The first synthesized organic compound from an ammonium cyanate is …………..
51. The major constituent of natural gas is………………………
52. LPG is mixed with __________ to detect leakage.
a) hydrogen
b) oxygen
c) mercaptans
d) nitrogen.
53. The antiknock property of the fuel depends on its
a) Self-ignition temperature b) Molecular structure
c) Chemical composition d) All of the above
54. Decomposition of higher hydrocarbon molecules into lower hydrocarbons having lower boiling
temperatures is known as
a) Polymerization
b) Hydrogenation
c) Isomerization
d) Cracking
55. The heat energy released is measured with the help of calorimeter (Say True or False)
56. Bomb calorimeter is used to determine the calorific value of the…………………fuels
a) Solid fuels
b) Liquid fuels
c) both a & b
d) None of the above |
57. ……………… is a secondary solid fuel.
a) wood
b) coal
c) peat
d) coke
58. A mixture of…………………….. is known as water gas.
a) Carbon monoxide and hydrogen b) Carbon monoxide and nitrogen
c) Carbon dioxide and hydrogen d) Carbon dioxide and nitrogen
59. A petroleum fraction obtained between 180-2500C is……………..
60. Octane number of Iso-octane is…………………...
a) 1
b) 50
c) 100
d) 5
61. The fermentation process of cattle dung in the absence of air produces gobar gas.
(Say True or False)
62. The liquefied petroleum gas(LPG) marketed by indian oil corporation is called………………..
63. Isomers have ____________ molecular formula
a) different
b) same
c) 2
d) 3
64. The combustion rate of solid fuels is slow because of the difficulty of thorough contact between the
solid fuel and oxygen. (Say True or False)
65. Burning of coal and diesel releases………………….
a) NO2
b) CO2
c) SO2
d) CO
66. The units of specific conductance are………………….
67. With rise in temperature the conductance of a solution of an electrolyte generally decreases
(Say True or False)
68.The conductivity of an electrolyte is due to the………………………..
a) presence of ions in the electrolyte b) free movement of ions in the solution
c) reunion of ions in the solution d) release of heat energy due to ionization
69. On passing electrical current through an electrolyte solution,…………………
a) cations move towards anode b) cations move towards cathode and anions towards anode
c) anions move towards cathode d) both cations and anions move in same direction
70. The fraction of total current carried by the cation and anion is termed as……………….
71. The sum of the transport number of cation and anion is equal to…………….
a) 1
b) 0
c) 0.5
d) Infinity
72. The ionic mobility of Li+is small as compared to that of K+It is because Li+ion is heavily hydrated
(Say True or False)
73. One faraday is equal to………………..
a) 96.500 coulombs
b) 9650 coulombs
c) 965.00 coulombs
d)96500 coulombs
74. According to Arrhenius theory an electrolyte when dissolved in water gives two types of……………
a) Charged particles
b) molecules
c) fundamental particles
d) atoms
75. Corrosion is a (an)……………. process.
a) oxidation
b) reduction
c) electrolysis
d) erosion.
76. …………. metal is used as a coating on steel to limit corrosion.
77. Corrosion starts at the…………………of the metal.
a) surface
b) middle
c) bottom
d) side
78. The electrode where reduction occurs is called…………….
79. Rust is………………….
a) Hydrated copper sulphate b) Hydrated ferrous sulphate
c) Hydrated ferric oxide d) Hydrated ferrous oxide.
80. Among lead, iron, chromium, and copper, the least easily oxidized metal is…………..
81. The study of the flow of heat or any other form of energy into or out of a system undergoing physical
or chemical change is called………………….
82. Thermodynamics is applicable to macroscopic systems only (Say True or False)
83. In an exothermic reaction the heat energy is……………..while in endothermic reaction it is…………
a) released, released b) released, absorbed
c) absorbed, released d) absorbed, absorbed
84. The mathematical relation for the first law of thermodynamics is……………
a) ΔE=q-w b) ΔE=0 for a cyclic process c) ΔE=q for an isochoric process d) all of these.
85. In an adiabatic process no heat can flow into or out of the system (Say True or False)
86. A thermoflask is an example of …………………
87. For an ideal gas,……………
88. A process which proceeds of its own accord, without any outside assistance is called…………..
a) non-spontaneous process b) spontaneous process
c) reversible process d) irreversible process
89. Entropy is a measure of………………… of the molecules of the system.
a) Concentration
b) Velocity
c) zig-zag motion
d) randomness or disorder
90. A machine that can do work by using heat which flows out spontaneously from a high-temperature
source to a low temperature sink is called…………………
a) Carnot machine
b) Cyclic machine
c) Heat machine
d) Heat engine
91. Mixing of two or more gases is a spontaneous process (Say True or False)
92. The entropy of the system increases in the order…………………….
a) gas < liquid < solid
b) solid < liquid < gas
c) gas < solid < liquid
d) none of these
93. Out of the following …………………is not an intensive property?
a) Pressure
b) Concentration
c) density
d) volume
94. Water heated in an open container is an example for closed system. (Say True or False)
95. ……………..is the unit for entropy.
a) KJ mol
b) JK-1mol
c) JK-1mol-1
d) KJmol
96. A spontaneous reaction proceeds with a decrease in………………..
97. Electrolysis of CuSO4 solution using platinum electrode produces …………..at the cathode.
a) Cu2SO4
b) sulphate ions
c) Cu
d) all the above
98. Lead storage cell is …………………cell.
99. Wood, Coal and Petroleum are carbon fuels (Say True or False)
100. Octane number is applicable for which of the following petroleum products?
a) diesel oil
b) petrol
c) lubricating oil
d) kerosene oil.
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