P – BLOCK ELEMENTS – 24

1) Which of the following polymerization processes can be used to prepare polystyrene?
a) Anionic
b) Cationic
c) Free radical
d) All the above

2) Terylene is made by polymerization of terephthalic acid with
a) Ethylene glycol
b) Phenol
c) Ethanol
d) Catechol

3) Teflon, styron and neoprene are all
a) Copolymers
b) Condensation polymers
c) Homopolymers
d) Monomers

4) The interparticle forces present in Nylon-66 are
a) van der Waals
b) Hydrogen bonding
c) Dipole-dipole interactions
d) None of the above

5) F2C = CF2 is a monomer of
a) Teflon
b) Glyptal
c) Nylon-6
d) Buna-5

6) Soft drink bottles and baby feeding bottles are generally made of
a) Polyester
b) Polyurethane
c) Polyurea
d) Polystyrene

7) The polymer used in bullet proof glass is
a) PMMA
b) Lexan
c) Nomex
d) Kevlar

8) Which of the following is a condensation homopolymer ?
a) Nylon-6
b) Nylon-66
c) Nylon-610
d) Dacron

9) Super glue or crazy glue is
a) Poly (methyl methacrylate)
b) Poly (ethyl acrylate)
c) Poly (methyl a-cyanoacrylate)
d) Poly (ethyl methacrylate)

10) Which of the following is a polymer?
a) Carnauba wax
b) Carbowax
c) Beeswax
d) Paraffin wax

11) Which of the following processes is usually employed for the preparation of carbowax from ethylene oxide? Â
a) Base-catalysed polymerization
b) Acid-catalysed polymeration
c) Free-radical polymerization
d) Coordination polymerization.

12) Bakelite is made from phenol and formaldehyde. The initial reaction between the two compounds is an example of
a) Aromatic electrophilic substitution
b) Aromatic nucleophilic substitution
c) Free radical reaction
d) Aldol condensation

13) Natural rubber and gutta percha are respectively
a) cis-Polyisoprene and trans-polyisoprene
b) Both are cis-polyisoprene
c) Both are trans-polyisoprene
d)

14) Which of the following polymers does not exist in isotactic, syndiotactic and atactic forms?

a) Polypropylene
b) Poly (ethylidene) chloride
c) Poly (vinyl chloride)
d) Polyacronitrile.

15) The correct repeating structural unit of polystyrene is
a)
b)
c)
d)

16) Catalytic hydrogenation of natural rubber gives a/an
a) Syndiotactic product
b) Atactic product
c) Isotactic product
d) None of these

17) Which of the following alkenes is most reactive towards cationic polymerization?
a)
b)
c)
d)

18) Which of the following alkenes is least reactive towards anionic polymerization ?
a)
b)
c)
d)

19) Toluenediisocyanate is used to prepare
a) Polyesters
b) Polyamides
c) Polycarbonates
d) Polyurethanes

20) Which of the following are biopolymers?
a) Nucleic acids
b) Leather
c) Bakelite
d) Both a and b

21) Which of the following are condensation polymers?
a) Polypropylene
b) Nylon-6
c) Glyptal
d) Both c and b

22) Which of the following are addition copolymers ?
a) Saran
b) PVC
c) SBR
d) Both (a) and (c).

23) Which of the following fibres are made of polyamides?
a) Wool
b) Natural silk
c) Artificial silk
d) Both (a) and (b).

24) Caliche is used in the manufacture of
a)
b)
c)
d)

25) Fluorine differs from other elements of the group in
a) Its high electronegativity
b) its small size
c) the non availability of orbitals
d) All are correct

26) Which of the following compounds is sp3d hybridised?
a)
b)
c)
d)

27) The superhalogen is among the following is
a)
b)
c)
d)

28) Electrolysis of brine gives
a)
b)
c) NaOH
d) All of the above

29) Which of the following pairs is not correctly matched ?
a) A halogen which is liquid at room temp. – Bromine
b) The most electronegative element fluorine
c) The most reactive halogen – Fluorine
d) The strongest oxidising agent – Iodine

30) Chlorine cannot replace
a) Fluorine from NaF
b) Bromine from NaBr
c) Iodine from Nal
d) None of these

31) The bleaching action of chlorine is due to
a) Reduction
b) Oxidation
c) Chlorination
d) Hydrogenation

32) Tear gas is
a)
b)
c)
d)

33) In the oxyacids of chlorine the Cl-O bond contains
a)
b)
c)
d) None

34) Arrange the hydrides of halogens on the basis of their ease of oxidation.
a) HI > HBr > HCl > HF
b) HF > HBr > HCl > HI
c) HBr > HCl > HI > HF
d) None of these

35) Arrange halogens in the order of their affinity with hydrogen.
a)
b)
c)
d) None

36) The element present in the combined state in laminaria stenophylla is
a) Bromine
b) Iodine
c) Fluorine
d) Chlorine

37) Which of the following is a pseudo halide ion?
a)
b)
c)
d) Both (a) and (b)

38) Arrange the halogens in the order of their affinity with oxygen
a)
b)
c)
d) None

39) Chlorine gas is dried over
a) Quick lime
b) Caustic soda
c) Caustic potash sticks
d)

40) The correct order of the size of iodine species, I, I and I+ is
a)
b)
c)
d)

41) Which is the metal halide which is insoluble in water ?
a)
b) KBr
c) AgF
d) Agl

42) The lowest value of 0.615 V for the reduction potential E for the reaction

X2 (solution) + 2e ® 2X (aq) may be assigned to

a)
b)
c)
d)

43) Which of the following can have the highest oxidation number?
a) O
b) Cl
c) C
d) N

44) Unlike other halogens, fluorine does not show the higher oxidation states because
a) It is highly electronegative
b) It has no d-orbital
c) Its atomic radius is very small
d) The Flourine ion is stable and isoelectronic with neon

45) The correct order of increasing oxidizing power is
a)
b)
c)
d)

46) The type of hybridisation present in the ClO2 ion is
a) sp
b)
c)
d)

47) Which one among the following non-metals is a liquid at 25°C?
a) Bromine
b) Carbon
c) Phosphorus
d) Sulphur

48) As the atomic number of the halogen increases, the halogen
a) Loses its outermost electron less readily
b) Becomes lighter in colour
c) Gains electrons less easily
d) None of these

49) Chlorine cannot be prepared by the action of HCl on
a)
b)
c) NaCl
d)

50) The correct order of increasing acid strength is
a)
b)
c)
d)

51) Cl2O is an anhydride of
a)
b) HOCl
c)
d)

52) Bromine is liberated when an aqueous KBr solution is treated with
a)
b)
c) HI
d)

53) Available chlorine is the chlorine liberated by the action of
a) Zn dust and HCl
b)
c) Excess of dilute acid on bleaching powder
d) A drop of dilute acid on bleaching powder

54) Fermings salt is
a) HF
b)
c) NaCl
d)

55) Which of the following halogen oxides is ionic?
a)
b)
c)
d)

56) A 500 g tooth paste has 0.2 g. fluoride concentration. What is the concentration of F- ions in ppm?
a) 250
b) 200
c) 400
d) 1000

57) Berthelots salt is
a)
b)
c)
d)

58) Which of the following bonds is most polar?
a) N-Cl
b) O-F
c) N-F
d) N-N

59) Chlorine reacts with NaOH under various conditions to give
a) NaCl
b) NaCIO
c)
d) All of these

60) Which of the following is most basic?
a)
b)
c)
d)

61) Which of the following is true with regard to atomic size?
a) H > F > Cl > Br > I
b) H < F < Cl < Br < I
c) F < Br < H < Cl < I
d) Br < Cl < H < F < I

62) Which of the following is paramagnetic?
a)
b)
c)
d)

63) The least oxidising acid from among the following is
a) HOCl
b)
c)
d)

64) Solid Cl2O6 exists as
a)
b)
c)
d)

65) Which of the following oxides is obtained by passing dry chlorine over silver chlorate at 90°C?
a)
b)
c)
d)

66) Which among the following is the weakest?
a) HF
b) HCl
c) HBr
d) HI

67) The element that oxidises water to oxygen with the evolution of much heat is
a) Fluorine
b) Chlorine
c) Iodine
d) Bromine

68) In the halogen group chlorine is a gas, bromine is a liquid and iodine exists as solid crystals. Then the next halogen astatine (At) would be
a) Solid at room temperature
b) Having higher electronegativity
c) Solid with higher IP
d) Least atomic size

69) Fluorine cannot be prepared by chemical methods because
a)
b)
c)
d)

70) Which of the following is most volatile?
a) HF
b) HCl
c) HBr
d) HI

71) HI cannot be prepared by the action of conc. H2SO4 on KI because
a)
b)
c)
d)

72) The shape of ClO3 is
a) Tetrahedral
b) Triangular planar
c) Triangular pyramid
d) Planar

73) Which of the following cannot give iodometric titration?
a)
b)
c)
d)

74) Which of the following represents calcium chlorite?
a)
b)
c)
d)

75) Which of the following has the largest size?
a)
b)
c)
d) Br

76) Some CI2 is liberated when we heat
a)
b)
c)
d)

77) Which of the following oxyacids of chlorine is formed on shaking chlorine water with freshly precipitated yellow oxide of mercury?
a)
b)
c)
d)

78) The white enamel of teeth is
a)
b)
c)
d)

79) Pure HF does not attack
a) Glass
b) Fe
c)
d) Polythene

80) Fluorine can be freed from HF by passing the mixture through
a)
b) An alkaline solution
c)
d) NaF

81) Which of the following is a liquid?
a)
b)
c)
d)

82) The correct decreasing order of acid strength is
a) HBrO > HClO > HIO
b) HClO > HBrO > HIO
c) HIO > HBrO > HClO
d) HClO >HIO >HBrO

83) F2 on treatment with methane gives
a)
b)
c)
d) All

84) The only halous acid known is of
a)
b)
c)
d)

85) The strongest oxidising agent among the following is
a)
b)
c)
d)

86) The respective oxidation states of iodine in HIO4 , H3IO5 , and H5IO6 are
a) +1, +3, +7
b) +7, +7, +7
c) +3, +3, +3
d) +7, +5, +3

87) The halogens which are gases at room temperature are
a) chlorine
b) Fluorine
c) Bromine
d) Both (a) and (b)

88) Fluorine gas can be obtained only by the electrolysis of fluoride. This is because
a) It is very reactive
b) It is the strongest oxidising agent
c) It is poisonous
d) None

89) The bleaching action of moist chlorine is due to the formation of
a) HOCl
b) HCl
c)
d)

90) Which halogen can be purified by sublimation?
a)
b)
c)
d)

91) Iodine is formed when potassium iodide reacts with a solution of
a)
b)
c)
d)

92) The structure of ICl2 is
a) Trigonal
b) Trigonal bipyramidal
c) Octahedral
d) Square planar

93) Which is the true covalent oxide of iodine?
a)
b)
c)
d)

94) In a given sample of bleaching powder the percentage of available chlorine is 49. The volume of chlorine obtained if 10 g. of the sample is treated with HCl at STP is
a) 1.54 l
b) 3.0 l
c) 15.0 l
d) 150 l

95) @ The ionisation potential of X- ion is equal to
a) The electron affinity of X atom
b) The electronegativity of X atom
c) The ionisation potential of X atom
d) None

96) In which of the following sets is the order of boiling points incorrect?
a) Xe > Ar > Ne
b) HF > HCl > HBr
c)
d)

97) HCl cannot form HCl2, while HF can form HF2. The reason is
a) Fluorine is more reactive
b) HF is more reactive
c) the fluorine atom is small and can form hydrogen bonds
d) None

98) on passing through solution gives
a)
b)
c)
d) NaHS

99) Which reaction cannot be used for the preparation of halogen acid ?
a)
b)
c)
d)

100) Chloric acid and hypochlorites are
a) Good oxidising agents
b) Bleaching agents
c) Undergo disproportion on heating
d) All are correct


Answer

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