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NEET Chemistry MCQ
Halogen Family Mcq Neet Chemistry
Quiz 1
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Q.1
The correct structure of tribromooctaoxide is ... [ NEET 2019]
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a)
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b)
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c)
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d)
Explanation
Answer: (a)
Q.2
tion Q2) Match the following : Which of the following is the correct option?
(a) Pure nitrogen
(i) Chlorine
(b) Haber process
(ii) Sulphuric acid
(c) Contact process
(iii)Ammonia
(d) Deacon’s process
(iv) Sodium azide or Barium azide
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a) a - (i); b - (ii); c - (iii); d - (iv)
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b) a - (ii); b - (iv); c - (i); d - (iii)
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c) a - (iii); b - (iv); c - (ii); d - (i)
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d) (iv) (iii) (ii) (i)
Explanation
Answer: (d)
Q.3
Which of the following statements is not true for halogens ? [NEET 2018]
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a) All but fluorine show positive oxidation states.
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b) All are oxidizing agents.
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c) All form monobasic oxyacids.
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d) Chlorine has the highest electron-gain enthalpy.
Explanation
Answer:(a)
Q.4
In the structure of ClF3, the number of lone pairs of electrons on central atom ‘Cl’ is .... [NEET 2018]
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a) four
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b) two
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c) one
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d) three
Explanation
Answer: (b)
Q.5
Which of the following is antiseptic? [Bihar CEE 2002]
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a) I
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b) Br
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c) Cl
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d) F
Explanation
Answer: (a)
Q.6
An element M as an atomic mass 19 and atomic numberIts ion is represented by
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a) M+
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b) M2+
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c) M-
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d) M2-
Explanation
M- have noble gas configuration Answer: (c)
Q.7
The shape of the molecule SF3Cl3 is .. [ kerala CEE 2000]
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a) Trigonal bipyramidal
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b) Cubic
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c) Octahedral
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d) Square pyramidal
Explanation
SF3Cl3 is similar to SF6 thus octahedral Answer:(c)
Q.8
A greenish yellow gas reacts with an alkali metal hydroxide to form a halate which can be used in fire works and safety matches. the gas and halate respectively... [ Roorkee screening test 2000]
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a) Br2 , KBrO3
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b) Cl2, KClO3
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c) I2, NaIO3
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d) Cl2, NaClO3
Explanation
A halate will be formed from halogen and the greenish yellow gas is Cl2. The halate which is used in fireworks and safety matches is KClO3. The reaction involved is 3Cl2 + 6KOH → KClO3 ( halate) + 5KCl + 3H2O Answer: (b)
Q.9
Freon is used as .. [ DPMT 1999]
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a) Refrigerant
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b) Catalyst
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c) Oxidant
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d) Both (b) and (c)
Explanation
Answer: (a)
Q.10
Which of the following has the strongest bond? [ DEC 2001]
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a) F-B
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b) F-Cl
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c) F-Br
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d) Cl-Br
Explanation
Due to higher difference in electronegativity bond strength is more Answer: (a)
Q.11
Consider the following reaction : 6NaOH + 3Cl2 → 5NaCl + A + 3H2O What is the oxidation number of chlorine in 'A'... [ EAMCET 2001]
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a) +5
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b) -1
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c) +3
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d) +1
Explanation
The product 'A' in the equation is NaClO3 and the oxidation state of Cl in it is +5 Answer:(a)
Q.12
Consider the following reaction Br2 + 2NaOH(dil.) → Product The product of the above reactions are [ BVP Pune 2002]
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a) NaBrO + NaBrO2 + H2O
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b) NaBrO + NaBr + H2O
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c) NaBr ++ H2O
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d) NaBrO + H2O
Explanation
Answer: (b)
Q.13
The correct order of acidic strength is ... [ IIT screening test 2000]
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a) Cl2O7 > SO2 > P4O10
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b) CO2 > N2O5 > SO3
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c) Na2O > MgO > Al2O3
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d) K2O > CaO > MgO
Explanation
More the oxidation number more acidic Answer: (a)
Q.14
The correct order of electron affinity ( negative value) among the following is .. [ Kerala CEE 2000 ]
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a) F > Cl > Br
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b) Br > Cl > F
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c) Cl > F > Br
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d) Br > F > Cl
Explanation
Answer: (c)
Q.15
Which of the following is not linear? [ DEC 2001]
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a) CO2
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b) ClO2
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c) I3-
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d) None of these
Explanation
ClO2 is angular Answer:(b)
Q.16
Which of the following statement is not feasible? [ CBSE PMT 2002]
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a) 2KI + Br2 → 2KBr + I2
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b) 2KBr + I2 → 2KI + Br2
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c) 2KBr + Cl2 → 2KCl + Br2
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d) 2H2O + 2F2 → 4HF + O2
Explanation
I 2 can not oxidise Br to Br- Answer: (b)
Q.17
Which of the following statements is true? [ CBSE PMT 2002]
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a) Silicon exhibits 4 coordination number in its compounds
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b) Bond energy of F2 is less than Cl2
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c) Mn(III) oxidation state is more stable than Mn(II) in aqueous state
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d) Elements of 15th group shows only +3 and +5 oxidation states
Explanation
Answer: (b)
Q.18
Which one of the following order is correct for the bond energies of halogen molecules? [ EAMCET 2001]
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a) I2 > Cl2 > Br2
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b) Br2 >Br2 > Cl2
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c) I2 > Br2 > Cl2
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d) Cl2 > Br2 > I2
Explanation
Answer: (d)
Q.19
The hybridization in ICl7 is .. [ DEC 2000]
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a) sp3d3
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b) d2sp3
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c) sp3d
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d) sp3
Explanation
Total valence electrons = 7×8= 56 Now 64 ÷ 8 = 7 thus sp3d3 hybridization Answer:(a)
Q.20
When KI and CuSO4 solution are mixed, It gives
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a) H2SO4 + I2
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b) Cu2I2 + K2SO4
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c) CuI2 + K2SO4
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d) Na2SO4 + I2
Explanation
2CuSO4 + 4KI → Cu2I2 + 2K2SO4 + I2 Answer: (b)
Q.21
The reaction of KMnO4 and HCl results in ... [CPMT 2000]
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a) Oxidation of Mn in KMnO4
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b) Reduction of Mn in KMnO4
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c) Oxidation of Mn in KMNO4 and production of H2
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d) Reduction of Mn in KMnO4 and production of Cl2
Explanation
2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 8H2O + 5Cl2 Answer: (d)
Q.22
The set with correct order of acidity is .. [ IIT Screening test 2001]
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a) HClO < HClO2 < HClO3
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b) HClO4 < HClO3 > HCl2 < HClO
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c) HClO < HClO2 < HClO3 < HClO2
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d) HClO4 < HClO2 < HClO3 < HClO
Explanation
As the oxidation number of Cl ( or halogen increases ) acidity increases Answer: (a)
Q.23
To obtain iodine, sea weeds are dried, burnt and extracted in hot water. The mother liquor left after the crystallization of certain salts treated with .. [ Kerala MEE 2001]
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a) Chloride
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b) Conc.H2SO4
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c) Conc. NaOH
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d) MNO2 + conc H2SO4
Explanation
2NaI + MnO2 + 3 H2SO4 → 2NaHSO4 + MnSO4 + 2H2O + I2 Answer:(d)
Q.24
In inerhalogen compounds, the maximum number of halogen atoms present are ... [ DPMT 2002]
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a) 2
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b) 4
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c) 6
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d) 8
Explanation
The ineter halogen containing maximum number of halogen atoms is IF7 which contains 1+7 = 8 atoms Answer: (d)
Q.25
Chlorine dioxide is best prepared by passing dry .. [ Kerala MEE 2003]
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a) Chlorine gas over hot HgO
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b) Cl2 and O2 gas over hot Pt catalyst
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c) HCl and O2 overhotAg2O
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d) Cl2 over hot silver chlorate
Explanation
2AgClO3 + Cl2 → 2AgCl + 2ClO3 + O2 Answer: (d)
Q.26
Which one of the following elements shows different oxidation states? [ EAMCET 2001]
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a) Sodium
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b) Fluorine
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c) Chlorine
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d) Potassium
Explanation
Chlorine shows different oxidation states form -1 to +1, +3, +5 and +7 Answer: (c)
Q.27
The correct decreasing order of acidic character is ... [ Chd. CET 2000]
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a) HClO > HBrO > HIO
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b) HIO > HBrO > HClO
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c) HBrO > HIO > HClO
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d) HClO > HIO > HBrO
Explanation
Acidity decreases in halogen as we go from Cl to I , Note acidity of HBr < HCl Answer:(a)
Q.28
Which of the following reaction involves oxidation and reduction? [ EAMCET 1999]
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a) H2 + Br2 → 2HBr
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b) HBr + AgNO3 → AgBr + HNO3
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c) NaBr + HCl → NaCl + HBr
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d) Na2O + H2SO4 → Na2SO4
Explanation
In the reaction H2 + Br2 → 2HBr H2 is oxidised to H+ and Br2 is reduced to Br- Answer: (a)
Q.29
When I2 is passed through KCl, KF, KBr solutions .. [ Haryana CEET 2000]
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a) Cl2 and Br2 are evolved
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b) Cl2 is evolved
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c) Cl2, Br2, F2 are evolved
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d) None of these
Explanation
I2 can not oxidise Cl-, Br- or F- in compound Answer: (d)
Q.30
The reaction 3ClO-(aq) → ClO3-(aq) + 2Cl-(aq) is an example of ... [ IIT screening test 2001]
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a) Oxidation reaction
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b) Reduction reaction
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c) Disproportionation reaction
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d) Decomposition reaction
Explanation
It is disproportionation reaction where the oxidation number of Cl changes from +1 ( ClO-) to +5(in CL3-) and -1 (in cl-) Answer: (c)
0 h : 0 m : 1 s
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