Question Bank solution
3 MARK --- QUESTION
4/5 MARK ----QUESTION
COURSE : DPT
SEMESTER : I
SUBJECT : Engineering Chemistry
1 mark – questions solution
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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
Answer : b) A-Z
2. The mass number and atomic number of Phosphorous atom are 31 and 15 respectively. The number of neutrons in the nucleus is……………….
Answer : 16
3. The idea of stationary orbits was first given by Rutherford (Say True or False)
Answer : False
4. The maximum number of electrons that can be accommodated in an orbit is…………………..
a) 2n b) n2
c) 2n2
d) 2n+1
Answer : c) 2n2
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
Answer : 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)
Answer : True
7. The maximum number of electrons that can be accommodated in f-subshell is………………
Aswer : 14
8. Isotopes have same atomic number but different mass number (Say True or False)
Answer : True
9. The most electronegative element in the periodic table is…………………..
Answer : Fluorine
10. …………………… is an electronic configuration of copper(Cu-atomic number 29).
a) 1s2,2s2,2s2,2p6,3s2,3p6,4s2,3d9
b) 1s2,2s2,2p6,3s2,3p6,4s1,3d10
c) 1s2,2s2,2s2,2p6,3s2,3p5,4s2,3d10
d) 1s2,2s2,2p6,2p6,3s2,3p5,4s2,3d9
Answer : 1s2,2s2,2p6,3s2,3p6,4s1,3d10
11. Which one of the following is the most polar………………………
a) H-F
b) H-Cl
c) H-Br
d) H-I
Answer : a) H-F
12. In a N2 molecule there are one sigma and two pi bonds (Say True or False)
Answer : True
13. …………………..is formed by head to head overlapping of atomic orbitals.
Answer : Sigma bond
14. The high boiling point of water is due to ………………….
a) Covalent bonding
b) Ionic bonding
c) Hydrogen bonding
d) Coordinate bonding
Answer : c) Hydrogen bonding
15. NH4Cl molecule contains only ionic bonding (Say True or False)
Answer : False
16. Acetic acid is a weak acid because it has………………………
a) high molecular mass
b) highly unstable
c) high ionisation
d) low ionization
Answer : 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
Answer : b) releases a proton
18. Solution is a homogeneous mixture of solute and solvent (Say True or False)
Answer : True
19. The ionic product of water is ……………………
Answer : 1 x 10-14
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
Answer : c) amphiprotic substances
21………………..of a solution is the number of equivalents of solute per litre of the solution.
Answer : Normality
22. In a super saturated solution, the amount of solute is more in comparison to saturated solution.
(Say True or False)
Answer : True
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
Answer : a) 4.9 g
24. pH>7, is generally called as…………………….
Answer : base
25. The taste of an acid is………………..
Answer : Sour taste
26. Polar compounds are soluble in polar solvents and Non-Polar compounds are soluble in non-polar
solvents (Say True or False)
Answer : True
27. Blue litmus Paper turns red colour, if it is………………solution.
Answer : Acidic
28. Red litmus paper turns blue colour, if it is…………….solution.
Answer : Alkaline
29. The Major quantity of the solution is called as solute (Say True or False)
Answer : 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
Answer : b) Keept the pH remains same
31. Temporary Hardness of water can be removed by boiling the water. (Say True or False)
Answer : True
32. The degree of hardness of water is usually expressed as………………
Answer : parts per million(ppm)
33. Calgon, Na2[Na4(PO3)6] is used as a………………………
a) water purifier
b) water hardener
c) water softener
d) none of these
Answer : c) water softener
34. Magnesium sulphate creates……………………. hardness in water.
a) Carbonate
b) Total
c) Temporary
d) Permanent
Answer : d) permanent
35. Deionised water has______________ ions.
a) H+
b) OHc) H+
and OH
d) None of the above.
Ans.: c) H+ and OH-
36. Carbonates and Bicarbonates of Ca and Mg creates _______________ hardness of water.
Answer : temporary
37. Hard water can not be used for washing purposes (Say True or False)
Answer : True
38. ………………is the sodium salt of higher fatty acid.
Answer : Soap
39. Permanent hardness can be removed by………………………
a) Lime soda process
b) Permutit process
c) Ion-exchange process
d) All of these
Answer : d) All the these
40. Ground water contains appreciable amount of calcium and magnesium salts(Say True or False)
Answer : True
41. The functional group of acid is……………….
a) RCOOH
b) RCOOR
c) RCHO
d) RCOR
Answer : a) RCOOH
42. Ester has pleasant fruity smell (Say True or False)
Answer : True
43. …………………..is not belongs to alcohol family.
a) C2H5OH
b) CH3OH
c) CH3CH2CH2OH
d) CH3OCH3
Answer : d) CH3OCH3
44. The functional group of ether is…………………
Answer : R-O-R
45. Alkyl groups has one hydrogen shortage of Alkane compounds (Say True or False)
Answer : True
46. ________________ property of carbon is responsible for the large number of carbon compounds .
a) Reducing
b) Catenation
c) Oxidizing
d) Hydrolysing
Answer: b) Catenation
47. All Organic compounds mainly consist of …………………..
Answer : Carbon and Hydrogen
48. Cyclic Compounds Contain one atom(Sulphur, Oxygen, Nitrogen) other than carbon is
called………………………………
Answer : Heterocyclic Compounds
49. The general formula for alkane is………………………….
a) CnH2n+2
b) CnH2n
c) CnH2n-2
d) CnH2n+4
Answer : a) CnH2n+2
50. The first synthesized organic compound from an ammonium cyanate is …………..
Answer : Urea
51. The major constituent of natural gas is………………………
Answer : Methane
52. LPG is mixed with __________ to detect leakage.
a) hydrogen
b) oxygen
c) mercaptans
d) nitrogen.
Answer : c) mercaptans
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
Answer : 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
Answer : d) Cracking
55. The heat energy released is measured with the help of calorimeter (Say True or False)
Answer : True
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
Aswer : c) both a & b
57. ……………… is a secondary solid fuel.
a) wood
b) coal
c) peat
d) coke
Answer : 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
Answer : a) Carbon monoxide and hydrogen
59. A petroleum fraction obtained between 180-2500C is……………..
Answer : Kerosene
60. Octane number of Iso-octane is…………………...
a) 1
b) 50
c) 100
d) 5
Answer : c) 100
61. The fermentation process of cattle dung in the absence of air produces gobar gas.
(Say True or False)
Answer : True
62. The liquefied petroleum gas(LPG) marketed by indian oil corporation is called………………..
Answer : Indane
63. Isomers have ____________ molecular formula
a) different b) same c) 2 d) 3
Answer : b) same
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)
Answer : True
65. Burning of coal and diesel releases………………….
a) NO2
b) CO2
c) SO2
d) CO
Answer: c) SO2
66. The units of specific conductance are………………….
Answer : ohm-1
cm-1
67. With rise in temperature the conductance of a solution of an electrolyte generally decreases
(Say True or False)
Answer : 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
Answer : b) free movement of ions in the solution
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
Answer : b) cations move towards cathode and anions towards anode
70. The fraction of total current carried by the cation and anion is termed as……………….
Answer : Transport number
71. The sum of the transport number of cation and anion is equal to…………….
a) 1
b) 0
c) 0.5
d) Infinity
Answer : a) 1
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)
Answer : True
73. One faraday is equal to………………..
a) 96.500 coulombs
b) 9650 coulombs
c) 965.00 coulombs
d)96500 coulombs
Answer : 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
Answer : a) Charged particles
75. Corrosion is a (an)……………. process.
a) oxidation
b) reduction
c) electrolysis
d) erosion.
Answer : a) oxidation
76. …………. metal is used as a coating on steel to limit corrosion.
Answer : Zinc
77. Corrosion starts at the…………………of the metal.
a) surface
b) middle
c) bottom
d) side
Ans.: a) Surface
78. The electrode where reduction occurs is called…………….
Answer : b) cathode
79. Rust is………………….
a) Hydrated copper sulphate b) Hydrated ferrous sulphate
c) Hydrated ferric oxide d) Hydrated ferrous oxide.
Answer : c) Hydrated ferric oxide
80. Among lead, iron, chromium, and copper, the least easily oxidized metal is…………..
Answer : copper
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………………….
Answer : Thermodynamics
82. Thermodynamics is applicable to macroscopic systems only (Say True or False)
Answer : True
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
Answer : b) released, 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.
Answer : d) all of these
85. In an adiabatic process no heat can flow into or out of the system (Say True or False)
Answer : True
86. A thermoflask is an example of …………………
Answer : Isolated system
87. For an ideal gas,……………
Answer : PV = nRT
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
Answer : b) Spontaneous 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
Answer : 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
Answer : d) Heat engine
91. Mixing of two or more gases is a spontaneous process (Say True or False)
Answer : True
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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
Answer : b) solid < liquid < gas
93. Out of the following …………………is not an intensive property?
a) Pressure
b) Concentration
c) density
d) volume
Answer : d) volume
94. Water heated in an open container is an example for closed system. (Say True or False)
Answer : False
95. ……………..is the unit for entropy.
a) KJ mol
b) JK-1mol
c) JK-1mol-1
d) KJmol
Answer : c) JK-1mol-1
96. A spontaneous reaction proceeds with a decrease in………………..
Answer : free energy
97. Electrolysis of CuSO4 solution using platinum electrode produces …………..at the cathode.
a) Cu2SO4
b) sulphate ions
c) Cu
d) all the above
Answer : c) Cu
98. Lead storage cell is …………………cell.
Answer : Secondary
99. Wood, Coal and Petroleum are carbon fuels (Say True or False)
Answer : True
100. Octane number is applicable for which of the following petroleum products?
a) diesel oil
b) petrol
c) lubricating oil
d) kerosene oil.
Answer : b) petrol
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