NTS Chemistry MCQs Online With Answers
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NTS Chemistry MCQs Online With Answers Solved
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NTS Chemistry MCQs Online with Answers
1. The branch of chemistry that deals with radioactivity, nuclear processes, and properties is called
(a) Industrial Chemistry
(b) Biochemistry
(c) Nuclear chemistry
(d) Analytical chemistry
View Answer
2. Silicon forms ………… percent of earth’s crust
(a) 8 %
(b) 47%
(c) 28%
(d) 78%
View Answer
3. Elements are represented by …..
(a) Formulas
(b) Signs
(c) Symbols
(d) Abbreviation
View Answer
4. The symbol of thiosulphate is …………
(a) SO4-2
(b) SO3-2
(c) S2O3-2
(d) SO4-3
View Answer
5. The chemical formula of limestone is
(a) CaO
(b) CaCO3
(c) C12H22O11
(d) SiO2
View Answer
6. Atomic mass unit is abbreviated as
(a) AMU
(b) A¬mu
(c) aMu
(d) Amu
View Answer
7. The empirical formula of benzene is
(a) HC
(b) CO
(c) CH
(d) OH
View Answer
8. An atom having a positive charge is called
(a) Canion
(b) Anion
(c) Cation
(d) Ion
View Answer
9. When a molecule loses or gains an electron it forms a ………….
(a) Anion
(b) Cation
(c) Ion
(d) Molecular ion
View Answer
10. Avagodro’s number is
(a) 6.62* 1023
(b) 6.00*1023
(c) 6.02*1023
(d) 6.02*1024
View Answer
11. Proton was discovered by
(a) Goldstein
(b) Thomas
(c) Daniel
(d) Emil
View Answer
12. Except electrons all other fundamental particles that lie within the nucleus
(a) Nucleolus
(b) Neutrons
(c) Nucleons
(d) Protons
View Answer
13. Shell N has sub-shells
(a) One
(b) Two
(c) Three
(d) Four
View Answer
14. Beryllium has electronic configuration
(a) 1s1
(b) 1s2,2s2,2p1
(c) 1s2,2s1
(d) 2s2,2p4
View Answer
15. The hydrogen third isotope is
(a) Tritium
(b) Protium
(c) Deuterium
(d) Aluminum
View Answer
16. To determine the age of carbon-containing products the radioactivity of ……….. isotope is measured
(a) C12
(b) C13
(c) C14
(d) C15
View Answer
17. Neutron was discovered in ……………
(a) 1931
(b) 1932
(c) 1933
(d) 1934
View Answer
18. Relationship between atomic masses of several groups of three elements
(a) Tetrad
(b) Triad
(c) Bivalent
(d) Pentavalent
View Answer
19. The electronic configuration of the boron family is
(a) ns1
(b) ns2
(c) ns2 np1
(d) ns3 np4
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20. Br35 has electro negativity
(a) 4.0
(b) 3.2
(c) 3.0
(d) 2.7
View Answer
21. Attaining eight electrons in the valence shell is called
(a) Triad rule
(b) Tetrad rule
(c) Duplet rule
(d) Octet rule
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22. The bond forms due to the mutual sharing of electrons
(a) Ionic bond
(b) Covalent bond
(c) Bond
(d) Electronic bond
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23. The energy required to break the bond between hydrogen and chlorine in hydrogen chloride is
(a) 410kJ
(b) 420kJ
(c) 430kJ
(d) 440kJ
View Answer
24. One Pascal is equal to
(a) 1Nm-2
(b) N-2
(c) NM-2
(d) Nm-3
View Answer
25. All intermolecular forces collectively called
(a) Dipole-dipole
(b) Hydrogen bonding
(c) Van der Waals
(d) Ionic bonding
View Answer
26. ………… configuration is stable one
(a) Metallic
(b) Noble gas
(c) Ionic
(d) Electronic
View Answer
27. Identify the compound which is not soluble in water
(a) NaCl
(b) C6H6
(c) KBr
(d) MgCl2
View Answer
28. The product of pressure and volume of a fixed mass of gas is constant at a constant temperature
(a) Pascal’s law
(b) Newton’s law
(c) Boyle’s law
(d) Charles’s law
View Answer
29. Diethyl ether has a freezing point
(a) -115C
(b) -116C
(c) -113C
(d) -114C
View Answer
30. The existence of an element in more than one form in the same physical state
(a) Electroplating
(b) Galvanization
(c) Allotropy
(d) Sympatery
View Answer
31. Solids are classified as crystalline and
(a) Metals
(b) Amorphous
(c) Allotropic
(d) Vapours
View Answer
32. Metal alloys like ( brass, and bronze ) has both elements …………
(a) Solids
(b) Liquids
(c) Gas
(d) Vapors
View Answer
33. Molarity is represented by …….
(a) M
(b) m
(c) Mol
(d) Mole
View Answer
34. CuSo4 stands for
(a) Calcium sulphate
(b) Carbon sulphate
(c) Crommium sulphate
(d) Copper sulphate
View Answer
35. Particles of colloids are big enough to scatter the beam of light called
(a) Tyndall effect
(b) Greenhouse effect
(c) Vander wall effect
(d) Charles effect
View Answer
36. Loss of electron is called
(a) Oxidation
(b) Reduction
(c) respiration
(d) Redox reaction
View Answer
37. In a neutral molecule the algebraic sum of the oxidation number of all elements is
(a) 1.0
(b) 0
(c) 0.01
(d) 0.001
View Answer
38. Substances that can conduct electricity in their aqueous solutions called
(a) Non electrolytes
(b) Electrolytes
(c) Strong electrolytes
(d) Week electrolytes
View Answer
39. A galvanic cell consists of ………… cells
(a) Two
(b) Three
(c) One
(d) Four
View Answer
40. When NaCl disassociates, Na has ……….. charge
(a) Positive
(b) Negative
(c) Neutral
(d) Two
View Answer
41. 2Cl-(l) gives us on oxidation
(a) Cl2(g) + 2e-
(b) 2Cl2(g) + 2e+
(c) Cl3(g) + 2e-
(d) 2Cl2(g) + 3e-
View Answer
42. Depositing one metal over another called
(a) Allotropy
(b) Distillation
(c) Sublimation
(d) Electroplating
View Answer
43. ‘’ K ‘’ has ………… atom number
(a) 18
(b) 19
(c) 22
(d) 11
View Answer
44. Silver is lustrous metal
(a) Grey
(b) White
(c) Golden
(d) Brown
View Answer
45. Gold is a yellow soft ………….
(a) Alloy
(b) Solid
(c) Metal
(d) Crystal
View Answer
46. The ionic size of calcium is
(a) 186,102 pm
(b) 160,72 pm
(c) 197,99 pm
(d) 170,81 pm
View Answer
47. The property of metals to lose their valance electrons called
(a) Electro negativity
(b) Electro positivity
(c) Allotropy
(d) Ionization
View Answer
48. The element in a group 2 are called
(a) Alkali
(b) Metal
(c) Alkaline earth
(d) Alloy
View Answer
49. Alkali metal does not react with ………… directly
(a) Hydrogen
(b) Carbon
(c) calcium
(d)Nitrogen
View Answer
50. The ionization energy of magnesium is
(a)496 kJ/mol
(b) 738, 1450 Kj/mol
(c) 590,1145 kJ/mol
(d) 650,839 kJ/mol
View Answer
51. When an electron is brought from an infinite distance close to the nucleus of the atom, the energy of the Electron-nucleus system?
(a) increases to a smaller negative value
(b) decreases to a greater negative value
(c) decreases to a smaller positive value
(d) increases to a greater positive value
View Answer
52. The probability of finding the electron in the nucleus is:
(a) 100% due to forces of attraction
(b) finite for all orbitals
(c) Zero for all orbitals
(d) Zero for some orbitals and finite for others
View Answer
53. When Zn metal is kept in CuSO4solution, copper is precipitated and ZnSO4is formed because:
(a) Atomic number of Zinc is smaller than copper
(b) Atomic number of Zinc is larger than copper
(c) Standard reduction potential of Zinc is more than that of copper
(d) Standard reduction potential of Zinc is less than that of copper
View Answer
54. Electrolytes when dissolved in water, dissociate into their constituent ions, the degree of
dissociation of an electrolyte increases with the:
(a) Presence of a substance yielding common ion
(b) Decreasing temperature
(c) Decreasing concentration of electrolyte
(d) Increasing concentration of electrolyte
View Answer
55. There is a large positive entropy change for an exothermic reaction. It means that the reaction
will be:
(a) possible at high temperatures only
(b) impossible at all temperatures
(c) possible at low temperatures only
(d) possible at all temperatures
View Answer
56. Which of the following statements is false?
(a) The temperature of the system will fall if an exothermic reaction is isolated from its
surroundings
(b) Energy is absorbed when one compound is converted into another with a higher heat content
(c) The temperature of the system is likely to fall if heat is absorbed during the course of a
reaction
(d) None of these
View Answer
57. pH + pOH of a solution is:
(a) 7
(b) Zero
(c) 14
(d) -14
View Answer
58. The compound that is not Lewis acid:
(a) BF3
(b) BaCl2
(c) SnCl4
(d) AlCl3
View Answer
59. Ore of Aluminium:
(a) Calamine
(b) Dolomite
(c) Bauxite
(d) Limestone
View Answer
60. Oxidation number of S in sulphuric acid:
(a) Four
(b) Six
(c) Two
(d) Eight
View Answer
61. D-block elements form coordination compounds because of the following:
(a) Small Cationic size
(b) Large ionic Charge
(c) Unfilled d-orbitals
(d) Filled d-orbitals
View Answer
62. Brass is an alloy of:
(a) Cu and Zn
(b) Cu, Ni, Zn
(c) Cu and Ni
(d) Cu, Al, Zn
View Answer
63. Urea is a high-quality nitrogenous fertilizer with:
(a) 76% nitrogen
(b) 46% nitrogen
(c) 66% nitrogen
(d) 26% nitrogen
View Answer
64. Diamond is:
(a) Good conductor of electricity
(b) Bad conductor of electricity
(c) Bad conductor on heating
(d) Good conductor on heating
View Answer
65. Carbon monoxide is poisonous gas because of it:
(a) replaces oxygen from the lungs
(b) forms carboxy hemoglobin
(c) Forms carbon dioxide with oxygen
(d) has a sweet smell
View Answer
66. Rust is:
(a) FeO + Fe(OH)2
(b) Fe2O3 + Fe(OH)2
(c) Fe2O3
(d) Fe2O3 + Fe(OH)3
View Answer
67. Calcium Carbide reacts with water to give:
(a) Methane
(b) Ethylene
(c) Acetylene
(d) Ethane
View Answer
68. Which of the following substituents deactivates the benzene ring and is o, p-directing?
(a) __ NH2
(b) __ Cl
(c) __ OCH3
(d) __ OH
View Answer
69. Which of the following is most readily nitrated?
(a) Toluene
(b) Benzaldehyde
(c) Nitrobenzene
(d) Benzoic Acid
View Answer
70. Ketones can be prepared by reaction of Grignard reagent with:
(a) Acid Amides
(b) Acid Chloride
(c ) Carboxylic Acid
(d) Epoxides
View Answer
71. Which of the following statements about the order of reaction is true?
(a) The order of a reaction can only be determined by experiment.
(b) A second-order reaction is also bimolecular
(c) The order of reaction must be a positive integer
(d) The order of reaction increases with increasing temperature.
View Answer
72. Polysaccharides yield many monosaccharides on:
(a) Hydration
(b) Oxidation
(c) Reduction
(d) Hydrolysis
View Answer
73. Which of the following is not aromatic?
(a) Benzene
(b) cyclooctatetraene
(c) Pyridine
(d) Phenol
View Answer
74. Which of the following is most basic?
(a) H2O
(b) NH3
(c) CH3NH2
(d) CH3OH
View Answer
75. Which of the following has the lowest pH?
(a) CH3COOH
(b) CF3COOH
(c) ClCH2COOH
(d) Cl3C COOH
View Answer
76. The equilibrium of two readily interconvertible isomers is called:
(a) Stereoisomerism
(b) Metamerism
(c) Tautomerism
(d) Polymorphism
View Answer
77. Which of the following gives tertiary alcohol when treated with Grignard reagent:
(a) HCHO
(b) CH3CHO
(c) C3H5CHO
(d) CH3COCH3
View Answer
78. Which of the following tests is not used to identify aldehydes?
(a) Tollen’s test
(b) Benedict solution test
(c) Fehling solution test
(d) Ammonia test
View Answer
79. Which is incorrect about alkaloids?
(a) Naturally Occurring
(b) Possess a heterocyclic ring
(c) Exhibit biological action
(d) acidic in nature
View Answer
80. Which of the following will not give the iodoform test:
(a) Acetone
(b) Ethyl alcohol
(c) Benzaldehyde
(d) Acetaldehyde
View Answer
81. The reaction of aniline with bromine water gives:
(a) o-bromoaniline
(b) p-bromoaniline
(c) 2,4-dibromo aniline
(d) 2,4,6-tribromoaniline
View Answer
82. The reaction of tripalmitin, with sodium hydroxide is called:
(a) Hydrolysis
(b) Saponification
(c) Esterification
(d) Combustion
View Answer
83. Which one is not Petrochemical?
(a) Naphthalene
(b) Mineral Oil
(c) Wax
(d) Table Salt
View Answer
84. Chemical adsorption:
(a) is exothermic
(b) is irreversible
(c) takes place at high temp.
(d) All of these
View Answer
85. The most commonly used absorbent for chromatographic separation of organic compounds is:
(a) Activated charcoal
(b) Fuller’s Earth
(c) Alumina
(d) Silica gel
View Answer
86. Grignard reagent is:
(a) Organo Zinc halide
(b) Organo cadmium bromide
(c) n-Butyl Lithium
(d) Organic Magnesium halide
View Answer
87. The antifreeze compound ethylene glycol has the formula:
(a) C2H5OH
(b) CH3OH
(c) C2H4(OH)2
(d) C3H5(OH)3
View Answer
88. Distillation is the best method for separating the two substances in which of the following:
(a) Water and salt dissolved
(b) water and a substance that does not dissolve in it
(c) Two liquids that have different boiling points
(d) Two solids that have different melting points.
View Answer
89. Which functional group is present in polyester shirts?
(a) Lactam
(b) Acid Chloride
(c) Ether
(d) Ester
View Answer
90. Which one of the following is used as an Antibiotic?
(a) Patulin
(b) Insulin
(c) Soserine
(d) Trypsin
View Answer
91. Which statement is true for Halogen (Halo-group)?
(a) Activating and O, p–directing
(b) Activating and m–directing
(c) Deactivating and O, p–directing
(d) None of these.
View Answer
92. Which one of the following can be synthesized from Aryl Diazonium Salt?
(a) Furfural
(b) Carbylamine
(c) Biphenyl
(d) THF
View Answer
93. The Methyl group in Methyl Magnesium Iodide can act as:
(a) CH3Radical
(b) CH3Carbonium ion
(c) CH3Carbanion
(d) Can react with a base
View Answer
94. Nylon is a copolymer of:
(a) Urea and Formaldehyde
(b) Phenol and Formaldehyde
(c) Hexamethylenediamine and adipic acid
(d) Vinyl Chloride and Vinyl alcohol
View Answer
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