BASIC CHEMISTRY QUESTION BANK

1) Vanaspati ghee is obtained by ----------------------

A. Hydrolysis

B. Hydrogenation

C. Carboxylation

D. Dehydration

ANS: B

2) Fill in the blank

N2+3H2 ----------------

2NH3

A. Fe catalyst

B. Si catalyst

C. Pt. catalyst

D. None of these

ANS: A

3) The sub which reduce the chemical reaction -------------------

A. Promoter

B. Positive

C. Inhibitor

D. All the above

ANS: C

4) Manufacture of H2SO4.is catalysed by -------------------------

A. Fe

B. Na

C. pt

D. cl

ANS: C

5) Hydrogenation of animal and vegetable oil using ------------as a catalyst.

A. Co

B. Ni

C. Cu

D. Zn

ANS: B

6) 2kclo3 + --------------- 2kcl +3o2 + MnO2

A. Mno2

B. Hcl

C. H2so4

D. Caco3

ANS: A

7) In Haber’s process

N2 +3H2 + ----------- 2NH3

A. Zn

B. Cu

C. Fe

D. None of these

ANS: C

8) In the hydrolysis of ester

CH3 COOC2H5 + H2O ------------------- ? + C2H5OH.

A. E2H5OH

B. CH3COOH

C. OH

D. None of the above

ANS: B

9) 2CO + O2 ------------------------------------

2CO2

A. NO

B. NO2

C. NO3

D. 2NO

ANS: A

10) The catalyst is present in the same phase --------------------------------

A. Homogenous catalyst

B. Heterogeneous catalyst

C. Positive catalyst

D. Negative catalyst

ANS: A

11) The sub which Alters the velocity of chemical reaction -------------

A. Catalyst

B. Polymer

C. Rubber

D. Thermocol

ANS: A

12) hexagonal closed pack crystal structure are -----------------

A. SiO2

B. NaCl

C. KCl

D. None of these

ANS: A

13) catalyst which enhances the chemical reaction

A. Positive catalyst

B. Negative catalyst

C. Auto catalyst

D. Inhibitor

ANS: A

14) Amorphous solids are having----------------------

A. Random particles arrangement

B. Fixed

C. Cubic

D. A and B are correct

ANS: A

15) Examples of amorphous solids ----------------------

A. Rubber

B. Plastics

C. Glass

D. All the above

ANS: D

16) ------------------ is the important property of crystalline solids

A. B.P

B. M.P

C. Colour

D. None of these

ANS: B

17) In the solid state matter ------

A. Particles are closed

B. Particles are loosely packed

C. Particles are far apart Frome each other

D. Inter molecular force are weak

ANS: A

18) In which state of matter ,there is perfect shape and size --------------

A. Solid

E. Liquid

F. Gases

G. All the above

ANS: A

19) They are having no intermolecular force---------------------

A. Solid state

B. Liquid state

C. A AND B

D. None Of Above

ANS: D

20) The valence of Na is

A. 3

B. 1

C. 2

D. 4

ANS: B

21) The electronic configuration of AL is ---------

A. 2, 8, 3

B. 2, 8, 4

C. 2,8,5

D. 2, 8, 6

ANS: A

22) Which of the following have covalent compound.

A. Nacl

B. NaoH

C. H2O

D. HCL

ANS: C

23) In which of the following molecules is the covalent bond most polar ?

A. HI

B. HBR

C. HCL

D. H2

ANS: C

24) A lone pair of electrons in an atom implies--------

A. A pair of valence electrons

B. A pair of electrons

C. A pair of electrons involved in bonding

D. A pair of valence electrons not involved in bonding

ANS: D

25) Chemical bond implies -----

A. Repulsion

B. Attraction

C. Attraction and repulsion balanced at particular distance

D. Attraction and repulsion

ANS: B

26) Which one of these is weakest bond?

A. Ionic bond

B. Covalent bond

C. Metallic bond

D. Van der walls force

ANS: D

27) H- bonding is not present in -------------------------

A. Glycerine

B. Water

C. Hydrogen sulphide

D. Hydrogen fluoride

ANS: A

28) Which of the following contain coordinate bond?

A. HCL

B. NH4+

C. H2O

D. NaOH

ANS: B

29) Covalent comp. is soluble in.

A. Polar solvent

B. Non polar solvent

C. Concentrated acid

D. All solvent

ANS: B

30) In the formation of oxygen molecule.

A. One pair of electron involved

B. Two pairs of electrons involved

C. Three pair of electrons involved

D. Four pair of electrons involved

ANS: B

31) CL2 IS ---------

A. Mono atomic

B. Triatomic

C. Diatomic

D. None of these.

ANS: C

32) The noble gases such as helium , neon are ---------------

A. diatomic

B. triatomic

C. monoatomic

D. polyatomic

ANS: C

33) Unit cell is the smallest building unit of ------------

A. liquids

B. gases

C. Crystal lattice

D. all of the above

ANS: C

34) Bond formed by sharing of six electron is Bond formed by sharing of six electron is

A. Double covalent bond

B. Electrovalent bond

C. Triple covalent bond

D. Co-ordinate bond

ANS: C

35) There is loss of electron take place by

A. Nobel gases

B. Metals

C. Non metals

D. Non of the above

ANS: B

36) Ions possess charge which depends on loss and gain of ………..

A. Proton

B. Neutron

C. Proton

D. Electrons

ANS: D

37) Acceptance of electron takes place to complete last shell by

A. Non metals

B. Metal

C. Inert gases

D. Non of these

ANS: A

38) Nitrogen molecule is formed by mutual sharing of pair of electrons are

A. 1

B. 2

C. 3

D. 4

ANS: C

39) Metals are having good conductivity because of

A. Protons

B. Localised electrons

C. Neutrons

D. Nucleons

ANS: B

40) Compounds formed by ionic bond are ……………..conductor of electricity.

A. Good

B. Bad

C. Poor

D. Non of these

ANS: A

41) When covalent compounds are dissolved in solvent produce

A. Ions

B. No ions

C. Electron

D. Protons

ANS: B

42) Compounds possess their properties depending on

A. Ions

B. Atoms

C. Molecules

D. All of the above

ANS: D

43) When the bond formed between atoms of element they achieve

A. Stable configuration of noble gas

B. Further reaction

C. Avoid reaction

D. None of these

ANS: A

44) Another name of ionic bond is

A. Covalent bond

B. Co-ordinate bond

C. Metallic bond

D. Electrovalent bond

ANS: D

45) Dative bond is another name of

A. Ionic bond

B. Electrovalent bond

C. Covalent bond

D. Co-ordinate bond

ANS: D

46) A molecule is formed by chemical bond when

A. Neutrons of combining atoms participate

B. Protons of combining atoms participate

C. Valence electrons of combining atoms participate

D. All of the above

ANS: C

47) When the reactants and catalyst are in different phase then it is known as

A. Auto catalysis

B. Homogeneous catalysis

C. Heterogeneous catalysis

D. None of these

ANS: C

48) Metals and non -metals combine to give electronic configuration of

A. Alkalies

B. Noble gases

C. Metalloids

D. Acids

ANS: B

49) When a covalent bond is formed between hydrogen atom and a very

electronegative atom, then it is known as

A. Ionic bond

B. Hydrogen bond

C. Co-ordinate bond

D. All of the above

ANS: B

50) When a product acts as a catalyst then it is called as

A. Simple catalysis

B. positive catalysis

C. Autocatalysis

D. Negative catalysis

ANS: C

51) Paint contains following constituents.

A. Pigment

B. Vehicle

C. Solvent

D. All of the above

ANS: D

52) The main purpose of applying paint on iron is

A. To protect it from rusting and corrosion.

B. To protect it from fungus.

C. To have beautiful appearance

D. None of these

ANS: A

53) The main purpose of application of paint on wooden surface is

A. To protect it from rusting.

B. To protect it from insects and fungus

C. To protect it from atmospheric corrosion

D. To protect it from acidic environment

ANS: B

54) A good paint should have characteristics.

A. High covering power

B. Fluid enough to spread easily

C. Washable

D. All of the above

ANS: D

55) Paint contains a pigment

A. Chromium oxide

B. Kerosene

C. Benzene

D. Turpentine

ANS: A

56) Paint contains vehicle

A. White lead

B. Red lead

C. Ferric made

D. Castor oil (dehydrated)

ANS: D

57) Paint contains thinner.

A. Tung Oil

B. Methylated spirit

C. linseed oil

D. Dehydrated castor oil

ANS: A

58) Function of pigment is

A. To give adhesion

B. To suspend pigments

C. To give strength to paint film

D. To improve drying quality

ANS: C

59) Varnish contains the constituents.

A. Natural or synthetic resin

B. Oil

C. Thinners

D. All of the above

ANS: D

60) Types of varnish

A. Oil and spirit

B. Plastic and rubber

C. Glass wool and theremocole

D. None of these.

ANS: A

61) Varnish do not contain

A. Oil

B. Pigment

C. Thinner

D. All of the above

ANS: B

62) Varnish is used to give

A. Opaue film

B. Green colour finish

C. Transparent, glossy film

D. None of these

ANS: C

63) Oxygen carrier catalysts are

A. Pigment

B. Thinner

C. Plasticizer

D. None of these

ANS: D

64) Insulator is the material which used to

A. prevent the flow of Heat

B. Electricity

C. Sound

D. Heat, sand and electricity

ANS: D

65) Good insulators are

A. Wood

B. Plastic

C. Rubber

D. All of the above

ANS: D

66) Ideal insulators should have

A. Low thermal conductivity

B. Low electrical conductivity

C. Low density

D. All of the above

ANS: D

67) Good insulator should be

A. Fire proof

B. Chemically inert

C. Odourless in use

D. All of the above

ANS: D

68) Insulators based on their state

A. Solid

B. Liquid

C. Gaseous

D. All of the above

ANS: D

69) Glass wool is obtained by forcing molten mass of alkali free glass through holes

having diameter.

A. 0.0005 cm

B. 0.005 cm

C. 0.05 cm

D. None of these

ANS: A

70) Glass wool should have low.

A. Density

B. Electrical conductivity

C. Thermal conductivity

D. All of the above

ANS: D

71) From the following, which is not a insulator ?

A. Thermocole

B. Glass wool

C. Mineral slag

D. Iron

ANS: D

72) Thermocole is used.

A. In refrigeration

B. In air conditioning

C. Packing for delicate equipments

D. Heat

ANS: C

73) Resin present in plastic is prepared by

A. Ionisation

B. Polymerisation

C. Distillation

D. Condensation

ANS: B

74) PVC plastic has another name

A. Polyethylene

B. Polystyrene

C. Bakelite

D. Poly-vinyl chloride

ANS: D

75) Nylon 66 is prepared by polymerization process

A. Condensation

B. Sublimation

C. Addition

D. Evaporation

ANS: C

76) Bakelite is obtained from Alcohoal and formaldehyde

A. aldehyde

B. Phenoal formaldehyde

C. Ketone and formaldehyde

D. Toluene and formaldehyde

ANS: B

77) The example of thermosetting plastic is

A. Bakelite

B. Polystyrene

C. Polyvinyl chloride

D. Poly tetarfluoro ethylene

ANS: A

78) The example of thermoplastic is

A. Nylon 66

B. Poly styrene

C. Nylon 6, 10

D. Urea formaldehyde

ANS: D

79) The polymer which is obtained by joining similar monomers are known as

A. Hetero polymer

B. Copolymer

C. Homopolymer

D. none of these

ANS: C

80) A plastic which can be reshaped and reused

A. Thermosetting plastics

B. Thermite

C. Thermocole

D. Thermoplastics

ANS: D

81) A plastic which can not be reshaped and reused

A. Thermosetting plastics

B. Thermoplastics

C. Polyethylene

D. Polystyrene

ANS: A

82) Name of soft plastic is

A. Bakelite

B. Nylon66

C. PVC

D. None of these

ANS: C

83) Name of hard plastic is ….

A. Polyethylene

B. Polystyrene

C. Bakelite

D. Teflon

ANS: C

84) PVC is chemically inert;so it can be used

A. For helmets

B. For making toys

C. For making sheets employed in tank

D. lining of strong acid and alkalis.

ANS: C

85) Teflon is an insulator used as insulating material

A. For transformers

B. In making gaskets

C. For packing

D. All of the above

ANS: D

86) Polystyrene is widely used in

A. Battery cases

B. Indoor lighting panels

C. Refrigerator parts

D. All of the above

ANS: D

87) Phenol plast is Widely used in

A. Switches plugs

B. Heater handles

C. Cabinets for radio and T.V._

D. All of the above

ANS: D

88) Epoxy resin is for

A. Bonding glass and metallic article

B. Bonding ceramic articles

C. Making araldite used in air-era industry

D. All of the above

ANS: D

89) An idal adhesive should be .

A. odourless

B. Resistant to heat and water

C. Economical in mm

D. All of the above

ANS: D

90) A trade name for epoxy resin in .

A. Glasswool

B. Bakelita

C. Araldite

D. Teflon

ANS: C

91) A substance introduced between two sliding surface: to reduce the frictional

resistance in known as .

A. Lubricant

B. Araldite

C. Bakelite

D. Teflon

ANS: A

92) The main functions of lubricant is

A. Surface wear ,t ear and deformationm

B. Weastage of energy in the form of heat

C. The power loss in internal combussion of engine

D. All of the above

ANS: D

93) Lubricants are classified as

A. Solid

B. Semi-solid

C. Liquid

D. All of the above

ANS: D

94) Solid lubricant are

A. Graphite

B. Soap

C. Soapstone

D. All of the above

ANS: D

95) Liquids lubricants are

A. Vegetable or animal oil

B. Mineral oils

C. Blended oil and synthetic oil;

D. All of the above

ANS: D

96) Semi-solid lubricant are

A. Waxes

B. Vaselines

C. Greases

D. All of the above

ANS: D

97) A force in dynes required to moveone square centimeter of liquid over another

surface with velocity of 1 cm/sec is known as

A. Viscosity

B. Viscosity index

C. Voltility

D. Acidity

ANS: A

98) A rate of change of viscosioty of liquid with temperature is

A. Viscosity

B. Viscosity index

C. Volatility

D. oilinesam m»

ANS: B

99) The power of oil to maintain a continuous film under pressure is known as

A. Viscosity

B. Volatility

C. Oiliness

D. Noneofthese

ANS: C

100) A good lubricant should have oiliness

A. High

B. Low

C. Medium

D. All of the above

ANS: D

101) A good lubricant should have

A. High flash and the point

B. Low volatility

C. Low acidity

D. All of the above

ANS: D

102) A good lubricant should have

A. Low saponification value

B. Low neutralization number

C. Low acidity

D. All of the above

ANS: D

103) For delicate instruments like watches, clocks which oil is suitable.

A. Palm oil

B. Hazel nut oil

C. Neat foot oil

D. All of these

ANS: D

104) Machineries as lathes, tractor rollers which lubricant is used.

A. Graphite

B. Soapstone

C. Molybdenum disulphide

D. All of these

ANS: D

105) A copolymer is formed by the union of two or more ......

A. molecules of same monomers by the elimination of small molecules like

water

B. monomer molecules in a chain without the elimination of water

C. monomer molecules with the elimination of small molecules like water

D. all of the above

ANS: D

106) Phenol-formaldehyde resin is,

A. PVC

B. Elastomer

C. Teflon

D. bakelite '

ANS: D

107) Polymer commonly used for making fibre/cloth is

A. rubber

B. PVC

C. nylon

D. bakelite ~ .

ANS: C

108) Bakelite is prepared by the condensation of ...

A. Benzene and formaldehyde

B. phenol and acetaldehyde

C. Phenol and formaldehyde

D. Alcohol

ANS: C

109) A polymer which can be soften on heating and harden on cooling is called.,

A. thermostatic

B. thermoplastic

C. thermosetting

D. thermite

ANS: C

110) Phenol- formaldehyde is an example of ......

A. linear chain polymer

B. elastomer

C. polymer

D. all of the above

ANS: D

111) Which one of the following is not a plastic ?

A. PVC

B. Bakelite

C. elastomer

D. nylon

ANS: C

112) One of the important uses of bakelite is for making ......

A. cables

B. electrical switches

C. CIOth

D. Hosepipe

ANS: B

113) The raw material for the manufacturing of PVC is .....

A. ethylene

B. vinyl chloride

C. phenol

D. styrene

ANS: B

114) Which one is a copolymer ?

A. nylon

B. Teflon

C. PVC

D. Polystyrene

ANS: D

115) What is the repeating unit in teflon ?

A. F2C= CF2

B. H2C = CH2

C. HgC = CH-Cl

D. H2C = CH -C5H5

ANS: A

116) Which one is not a thermoplastic .

A. polyethylene

B. PVC

C. Bakelite

D. Teflon

ANS: C

117) Molecular mass of a polymer is ......

A. small

B. very small

C. large

D. negligible

ANS: C

118) Which of the following polymers are hard ?

A. Linear

B. cross-linked

C. thermoplastic

D. all of the above

ANS: B

119) Which formation is an example of addition polymerization .

A. nylon

B. ethylene

C. polyethylene

D. Bakelite

ANS: B

120) PVC is ......

A. inflammable

B. non-flammable

C. a thermoset

D. an elastomer

ANS: C

121) A polymer used mostly for forming textile fibre is......

A. PVC

B. Nylon

C. bakelite

D. all of the above

ANS: B

122) A polymer which can not be softened by reheating is called.........

A. thermoplastic

B. thermo softening polymer

C. Thermo setting polymer

D. Rubber

ANS: B

123) Polymerisation of ethylene produces ......

A. linear chain polymer

B. cross-link polymer

C. 9105mm

D. all of the above

ANS: A

124) Epoxy resin is an example of ......

A. Copolymer

B. Homopolymer

C. Elastomer

D. Monomer

ANS: A

125) Commercial name of epoxy resin is ......

A. Alcohol

B. Ammonia

C. Monomer

D. Elastomer

ANS: B

126) Adhesive is a substance used......

A. For sticking two unlike bodies together

B. For mixing metals and non-metals

C. For purification of water

D. For making alloy 1'5

ANS: A

127) Which one is not an adhesive?

A. phenol-formaldehyde resin

B. urea-formaldehyde resin

C. araldite

D. duralumin

ANS: D

128) Which of these adhesives will glue mdf to acrylic?

A. PVA(Polyvinyl acetate)

B. Epoxy resin

C. Tensol cement

D. None of these

ANS: B

129) Adherends means ......

A. Bodies held together by an adhesive

B. bonding which hold two bodies together

C. Substance used to stick two bodies

D. force between two bodies

ANS: A

130) An adhesive which commonly finds application in aircraft industry is ......

A. starch

B. animal glue

C. Araldite

D. Plexi glass

ANS: C

131) An example of natural adhesive used in stamps, envelops etc.is ......

A. starch

B. asphalt

C. araldite

D. Wax

ANS: A

132) An example of vegetable glue is ......

A. Soyabean glue

B. casein glue

C. both (a) and (b)

D. none of the above

ANS: B

133) Glue is ......

A. pure protein and other animal substances

B. impure glue, pure protein and other animal substances

C. rubber

D. Polymer

ANS: B

134) Adhesive used for making packing kit, paper boxes, card-board

containersetc.is

A. Shellac resin

B. Casein glue

C. animal glue

D. sodium silicate

ANS: D

135) An example of inorganic adhesive is ......

A. casein

B. Plexi glass

C. Araldite

D. Sodium silicate

ANS: D

136) Phenol-formaldehyde resin find application in manufacturin...

A. Card boxes

B. conveyor belt

C. furniture

D. laminates

ANS: D

137) Which of the following is not a natural adhesive?

A. asphalt

B. shellac

C. soyabean

D. resin

ANS: D

138) Highly thick adhesive produces ......

A. Thick film having good adhesion

B. Thick film having poor adhesion

C. Thin film having good adhesion

D. Thin film having poor adhesion

ANS: B

139) Adhesive used for bonding metal is ......

A. Epoxy resin

B. Silicone resin

C. both of these

D. none of these

ANS: C

140) Which of the following give least adhesive strength ?

A. animal glue

B. starch

C. Epoxy resin

D. silicone resin

ANS: D

141) Adhesive used for bonding glass, metals, ceramics is ......

A. animal glue

B. starch

C. epoxy resin

D. sodium silicate

ANS: C

142) Graphite is which type of lubricant ?

A. solid

B. semi-solid

C. liquid

D. gaseous

ANS: A

143) Lubricant helps to get ......

A. Frictionless motion of machine parts

B. More friction between machine parts

C. More amount of heat in machine parts

D. none of these

ANS: A

144) Lubricating oil ......

A. minimizes wear in moving parts of a machine

B. helps in keeping the machine parts cool

C. washes away and carries away dirt, from machine parts

D. all of these

ANS: D

145) Viscosity index (VI)is a measure for change of viscosity with change in

A. Pressure

B. Density

C. Volume

D. Temp

ANS: D

146) A lubricant is used with the object of ......

A. Increasing frictional heat between machine parts

B. Increasing resistance of machine part

C. Providing direct contact of two rubbing surfaces

D. decreasing friction resistance

ANS: D