NTS Chemistry MCQs Online With Answers

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NTS Chemistry Test MCQs: Start Here

 

NTS Chemistry MCQs With Answers Online Solved

 

1. The branch of chemistry which deals with radio activity , nuclear processes and properties is called
(a) Industrial chemistry
(b) Bio chemistry
(c) Nuclear chemistry
(d) Analytical chemistry

View Answer
Answer: Option C

2. Silicon forms ………… per cent of earth crust
(a) 8 %
(b) 47%
(c) 28%
(d) 78%

View Answer
Answer: Option C

3. Elements are represented by …..
(a) Formulas
(b) Signs
(c) Symbols
(d) Abbreviation
View Answer
Answer: Option C

4. The symbol of thiosulphate is …………
(a) SO4-2
(b) SO3-2
(c) S2O3-2
(d) SO4-3

View Answer
Answer: Option C

5. The chemical formula of lime stone is
(a) CaO
(b) CaCO3
(c) C12H22O11
(d) SiO2

View Answer
Answer: Option B

6. Atomic mass unit is abbreviated as
(a) AMU
(b) A¬mu
(c) aMu
(d) Amu

View Answer
Answer: Option D

7. The empirical formula of benzene is
(a) HC
(b) CO
(c) CH
(d) OH
View Answer
Answer: Option C

8. Atom having positive charge is called
(a) Canion
(b) Anion
(c) Cation
(d) Ion

View Answer
Answer: Option C

9. When a molecule losses or gains an electron it forms a ………….
(a) Anion
(b) Cation
(c) Ion
(d) Moleculer ion

View Answer
Answer: Option D

10. Avagodro’s number is
(a) 6.62* 1023
(b) 6.00*1023
(c) 6.02*1023
(d) 6.02*1024

View Answer
Answer: Option C

11. Proton was discovered by
(a) Goldstein
(b) Thomas
(c) Daniel
(d) Emil

View Answer
Answer: Option A

12. Except electrons all other fundamental particles that lie within the nucleus
(a) Nucleolus
(b) Neutrons
(c) Nucleons
(d) Protons

View Answer
Answer: Option C

13. Shell N has sub shells
(a) One
(b) Two
(c) Three
(d) Four
View Answer
Answer: Option D

14. Beryllium has electronic configuration
(a) 1s1
(b) 1s2,2s2,2p1
(c) 1s2,2s1
(d) 2s2,2p4

View Answer
Answer: Option C

15. The hydrogen third isotop is
(a) Tritium
(b) Protium
(c) Deuterium
(d) Alluminium

View Answer
Answer: Option A

16. To determine the age of carbon containing products the radio activity of ……….. isotop is measured
(a) C12
(b) C13
(c) C14
(d) C15

View Answer
Answer: Option C

17. Nutron was discovered in ……………
(a) 1931
(b) 1932
(c) 1933
(d) 1934
View Answer
Answer: Option B

18. Relationship between atomic masses of several groups of three elements
(a) Tetrad
(b) Triad
(c) Bivalent
(d) Pentavalent

View Answer
Answer: Option B

19. The electronic configuration of boron family is
(a) ns1
(b) ns2
(c) ns2 np1
(d) ns3 np4

View Answer
Answer: Option C

20. Br35 has electro negativity
(a) 4.0
(b) 3.2
(c) 3.0
(d) 2.7
View Answer
Answer: Option C

21. Attaining eight electrons in the valence shell is called
(a) Triad rule
(b) Tetrad rule
(c) Duplet rule
(d) Octet rule

View Answer
Answer: Option D

22. The bond form due to mutual sharing of electrons
(a) Ionic bond
(b) Covalent bond
(c) Bond
(d) Electronic bond

View Answer
Answer: Option B

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
Answer: Option C

24. One pascal is equal to
(a) 1Nm-2
(b) N-2
(c) NM-2
(d) Nm-3

View Answer
Answer: Option A

25. All inter molecular forces collectively called
(a) Dipole-dipole
(b) Hydrogen bonding
(c) Van der waals
(d) Ionic bonding

View Answer
Answer: Option C

26. ………… configuration is stable one
(a) Metallic
(b) Noble gas
(c) Ionic
(d) Electronic

View Answer
Answer: Option B

27. Identify the compound which is not soluble in water
(a) NaCl
(b) C6H6
(c) KBr
(d) MgCl2

View Answer
Answer: Option B

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
Answer: Option C

29. Diethyl ether has freezing point
(a) -115C
(b) -116C
(c) -113C
(d) -114C

View Answer
Answer: Option B

30. The existence of an element in more than one form in same physical state
(a) Electro plating
(b) Galvanization
(c) Allotropy
(d) Sympatery

View Answer
Answer: Option C

31. Solids are classified as crystalline and
(a) Metals
(b) Amorphous
(c) Allotropic
(d) Vapours

View Answer
Answer: Option B

32. Metal alloys like ( brass , bronze ) has both elements …………
(a) Solids
(b) Liquids
(c) Gas
(d) Vapors

View Answer
Answer: Option A

33. Molarity is represented by …….
(a) M
(b) m
(c) Mol
(d) Mole

View Answer
Answer: Option A

34. CuSo4 stands for
(a) Calcium sulphate
(b) Carbon sulphate
(c) Crommium sulphate
(d) Copper sulphate

View Answer
Answer: Option D

35. Particles of colloids are big enough to scatter the beam of light called
(a) Tyndall effect
(b) Green house effect
(c) Vander wall effect
(d) Charles effect

View Answer
Answer: Option A

36. Loss of electron is called
(a) Oxidation
(b) Reduction
(c) respiration
(d) Redox reaction

View Answer
Answer: Option A

37. In neutral molecule the algebric sum of the oxidation number of all elements is
(a) 1.0
(b) 0
(c) 0.01
(d) 0.001

View Answer
Answer: Option B

38. Substances which can conduct electricity in their aqueous solutions called
(a) Non electrolytes
(b) Electrolytes
(c) Strong electrolytes
(d) Week electrolytes
View Answer
Answer: Option B

39. A galvanic cell consists of ………… cells
(a) Two
(b) Three
(c) One
(d) Four

View Answer
Answer: Option A

40. When NaCl disassociates, Na has ……….. charge
(a) Positive
(b) Negative
(c) Neutral
(d) Two

View Answer
Answer: Option A

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
Answer: Option A

42. Depositing one metal over other called
(a) Allotropy
(b) Distillation
(c) Sublimation
(d) Electroplating

View Answer
Answer: Option D

43. ‘’ K ‘’ has ………… atom number
(a) 18
(b) 19
(c) 22
(d) 11
View Answer
Answer: Option B

44. Silver is lustrous metal
(a) Grey
(b) White
(c) Golden
(d) Brown

View Answer
Answer: Option B

45. Gold is a yellow soft ………….
(a) Alloy
(b) Solid
(c) Metal
(d) Crystal

View Answer
Answer: Option C

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
Answer: Option C

47. The property of metals to lose their valance electrons called
(a) Electro negativity

(b) Electro positivity
(c) Allotropy

(d) Ionization

View Answer
Answer: Option B

48. The element in a group 2 are called
(a) Alkali
(b) Metal
(c) Alkaline earth
(d) Alloy

View Answer
Answer: Option C

49. Alkali metal do not react with ………… directly
(a) Hydrogen
(b) Carbon
(c) calcium
(d)Nitrogen

View Answer
Answer: Option B

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
Answer: Option B

51. When an electron is brought from infinite distance close to the nucleus of the atom, the energy of 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
Answer: Option B

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
Answer: Option C

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
Answer: Option D

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
Answer: Option C

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
Answer: Option C

56. W

hich of the following statement 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 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
Answer: Option C

57. pH + pOH of a solution is:
(a) 7

(b) Zero

(c) 14

(d) -14

View Answer
Answer: Option C

58. The compound that is not Lewis acid:
(a) BF3

(b) BaCl2
(c) SnCl4
(d) AlCl3

View Answer
Answer: Option B

59. Ore of Aluminium:
(a) Calamine
(b) Dolomite
(c) Bauxite
(d) Limestone

View Answer
Answer: Option C

60. Oxidation number of S in sulphuric acid:
(a) Four
(b) Six
(c) Two
(d) Eight

View Answer
Answer: Option B

61. d-block elements form coordination compounds because of:
(a) Small Cationic size
(b) Large ionic Charge
(c) Unfilled d-orbitals
(d) Filled d-orbitals

View Answer
Answer: Option C

62. Brass is an alloy of:
(a) Cu and Zn
(b) Cu, Ni, Zn
(c) Cu and Ni
(d) Cu, Al, Zn

View Answer
Answer: Option A

63. Urea is a high quality nitrogenous fertilizer with:
(a) 76% nitrogen
(b) 46% nitrogen
(c) 66% nitrogen
(d) 26% nitrogen

View Answer
Answer: Option B

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
Answer: Option B

65. Carbon monoxide is poisonous gas because it:
(a) replaces oxygen from lungs
(b) forms carboxy haemoglobin
(c) Forms carbon dioxide with oxygen
(d) has a sweet smell

View Answer
Answer: Option B

66. Rust is:
(a) FeO + Fe(OH)2
(b) Fe2O3 + Fe(OH)2
(c) Fe2O3
(d) Fe2O3 + Fe(OH)3

View Answer
Answer: Option D

67. Calcium Carbide reacts with water to give:
(a) Methane
(b) Ethylene
(c) Acetylene
(d) Ethane

View Answer
Answer: Option C

68. Which of the following substituent deactivates benzene ring and is o, p-directing?
(a) __ NH2
(b) __ Cl
(c) __ OCH3
(d) __ OH

View Answer
Answer: Option B

69. Which of the following is most readily nitrated?
(a) Toluene
(b) Benzaldehyde
(c) Nitrobenzene
(d) Benzoic Acid

View Answer
Answer: Option A

70. Ketones can be prepared by reaction of Grignard reagent with:
(a) Acid Amides
(b) Acid Chloride
(c ) Carboxylic Acid
(d) Epoxides

View Answer
Answer: Option B

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
Answer: Option C

72. Polysaccharides yield many monosaccharides on:
(a) Hydration
(b) Oxidation
(c) Reduction
(d) Hydrolysis

View Answer
Answer: Option D

73. Which of the following is not aromatic?
(a) Benzene
(b) cyclooctatetraene
(c) Pyridine
(d) Phenol

View Answer
Answer: Option B

74. Which of the following is most basic?
(a) H2O
(b) NH3
(c) CH3NH2
(d) CH3OH

View Answer
Answer: Option C

75. Which of the following has lowest pH?
(a) CH3COOH
(b) CF3COOH
(c) ClCH2COOH
(d) Cl3C COOH

View Answer
Answer: Option B

76. The equilibrium of two readily interconvertible isomers is called:
(a) Stereoisomerism
(b) Metamerism
(c) Tautomerism
(d) Polymorphism

View Answer
Answer: Option C

77. Which of the following gives a tertiary alcohol when treated with Grignard reagent:
(a) HCHO
(b) CH3CHO
(c) C3H5CHO
(d) CH3COCH3

View Answer
Answer: Option D

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
Answer: Option D

79. Which is incorrect about alkaloids?
(a) Naturally Occuring
(b) Possess a hetrocyclic ring
(c) Exhibit biological action
(d) acidic in nature

View Answer
Answer: Option D

80. Which of the followings will not give iodoform test:
(a) Acetone
(b) Ethylacohol
(c) Benzaldehyde
(d) Acetaldehyde

View Answer
Answer: Option B

81. The reaction of aniline with bromine water gives:
(a) o-bromoaniline
(b) p-bromoaniline
(c) 2,4-dibromoaniline
(d) 2,4,6-tribromoaniline

View Answer
Answer: Option B

82. The reaction of tripalmitin, with sodium hydroxide is called:
(a) Hydrolysis
(b) Saponification
(c) Esterification
(d) Combustion

View Answer
Answer: Option B

83. Which one is not Petrochemical?
(a) Napthalene
(b) Mineral Oil
(c) Wax
(d) Table Salt

View Answer
Answer: Option D

84. Chemical adsorption:
(a) is exothermic
(b) is irreversible
(c) takes place at high temp.
(d) All of these

View Answer
Answer: Option D

85. The most commonly used absorbent for chromatographic separation of organic compound is:
(a) Activated charcoal
(b) Fuller’s Earth
(c) Alumina
(d) Silica gel

View Answer
Answer: Option B

86. Grignard reagent is:
(a) Organo Zinc halide
(b) Organo cadmium bromide
(c) n-Butyl Lithium
(d) Organo Magnesium halide

View Answer
Answer: Option D

87. The antifreeze compound ethylene glycol has the formula:
(a) C2H5OH
(b) CH3OH
(c) C2H4(OH)2
(d) C3H5(OH)3

View Answer
Answer: Option C

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 which does not dissolve in it
(c) Two liquids that have different boiling points
(d) Two solids that have different melting points.

View Answer
Answer: Option C

89. Which functional group is present in polyester shirt?
(a) Lactam
(b) Acid Chloride
(c) Ether
(d) Ester

View Answer
Answer: Option D

90. Which one of the following is used as an Antibiotic?
(a) Patulin
(b) Insulin
(c) Soserine
(d) Trypsin

View Answer
Answer: Option A

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
Answer: Option C

92. Which one of the following can be synthesized from Aryl Diazonium Salt?
(a) Furfural
(b) Carbylamine
(c) Biphenyl
(d) THF

View Answer
Answer: Option B

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
Answer: Option C

94. Nylon is a copolymer of:
(a) Urea and Formaldehyde
(b) Phenol and Formaldehyde
(c) Hexamethylenediamine and adipic acid
(d) Vinyl Chloride and Vinylalcohol

View Answer
Answer: Option C
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