JEE Questions for Chemistry Class 12 P Block Elements Quiz 16 - MCQExams.com

Which of following represents clear electro positive properties
  • F
  • Cl
  • Br
  • I
Which of following represents outermost shell of halogens
  • S2P3
  • S2P6
  • S2P4
  • S2P5
Most activeness of fluorine is due to
  • F–F bond has less energy
  • F2 is gas at normal temp
  • Its e– affinity is max
  • None of above
Which of following after reacting with KI do not remove Iodine
  • CaSO4
  • K2Cr2O7
  • HNO3
  • HCl
Aqueous solution of which of following acid can not be kept in bottle of glass
  • HF
  • HCl
  • HBr
  • HI
Which of following pair is not correctly matched
  • Halogen which is liquid at room temp. – Bromine
  • Most electronegative element – Fluorine
  • Most reactive halogen – Flouorine
  • The Strorgest oxidizing halogen – Iodine
Mark element that shows oxidation state only one
  • F
  • Cl
  • Br
  • I
Which of following has lowest boiling point
  • HF
  • HCl
  • HBr
  • HI
Fluorine is stronger oxidizing agent than chlorine in aqueous solution. This is attributed to many factors except.
  • Heat of dissociation
  • e-affinity
  • Heat of Hydration
  • Ionisation Potential
Mark the element that displaces 3 halogens from their compound
  • F
  • Cl
  • Br
  • I
Mark smallest atom
  • F
  • Cl
  • Br
  • I
Which of following arrangement for 3 halogens Cl, Br, I when placed in order of increasing e-affinity
  • Cl, Br, I
  • I, Br, Cl
  • Br, Cl , I
  • I , Cl , Br
Fluorine is better oxidizing agent than Br2, It is due to
  • Small size of F.
  • More e – repulsion in F.
  • More e – neg. in F.
  • Non – Metallic nature of F.
Which statement is correct about halogens?
  • They are all diatomic
  • They are forming universal solvents
  • They can mutually displace each other from solution of their compound with metals.
  • None of above
Which of following is most basic?
  • I
  • Br
  • Cl
  • F
Which of following is not a green house gas?
  • CO2
  • CH4
  • O3
  • N2X
In isolation of F., a number of difficulties were encounted. Which statement is correct?
  • Potential required for discharge of F. ions is the lowest.
  • F. reacts with most glass vessel
  • F has great affinity for H.
  • Electrolysis of aqueous HF gives ozonised O2
Chlorine gas is dried over
  • CaO
  • NaOH
  • KOH
  • Conc. H2SO4
Chlorine is used in water for
  • Killing germs
  • Prevention of pollution
  • Cleansing
  • Removing dirt.
Chlorine can not be used
  • As bleaching agent
  • Sterilisation
  • Preparation of antiseptic
  • Extraction of silver & copper
Euchlorine is mixture of
  • Cl2 and SO2
  • Cl2 and ClO2
  • Cl2 and CO
  • None of these
Which two salts are used in preparing iodised salt.
  • KIO3 and I2
  • KI and I2
  • KIO3 and HI
  • HI and KI
Which of following halogen oxides is ionic?
  • ClO2
  • BrO2
  • I2O5
  • I4O9
Type of bonding in HCl is
  • Pure Covalent
  • Polar Covalent
  • Highly Covalent
  • H – bonding
Tincture of iodine is
  • Aq. Sol. of I2
  • Solution of I2 in Aq. KI
  • Alc. Sol. in I2
  • Aq. Sol. of KI
HBr & HI reduce Sulphuric acid, HCl can reduce KMnO4 and HI can reduce
  • H2SO4
  • KMnO4
  • K2Cr2O7
  • None
Hydrogen bonding is present in
  • HF
  • HCl
  • HBr
  • HI
Which one of following orders is not proper

  • Chemistry-Class 12 p Block Elements-2856.png
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    Chemistry-Class 12 p Block Elements-2857.png

  • Chemistry-Class 12 p Block Elements-2858.png

  • Chemistry-Class 12 p Block Elements-2859.png
Which of following chemicals contains chlorine?
  • Fischer salt
  • Epsom salt
  • Fremy's salt
  • Spirit of salt
The halide NaF has high melting point than NaCl , NaBr, & NaI because
  • Minimum ionic character
  • Maximum ionic character
  • Highest oxidizing power
  • Lowest polarity
Effective component of bleaching powder is –
  • Cl
  • Br
  • Al
  • Ca
Which of following is prepared by electrolytic method?
  • Ca
  • Sn
  • S
  • F2
Chlorine dioxide is best prepared by passing dry
  • Cl . gas over hot HgO
  • Cl & O2 gas overhot pt. catalyst
  • Chlorine over hot silver chromate
  • None of above
Which one of following in aqueous solution gives a white precipitate with per chloric acid
  • NaCl
  • KCl
  • MgCl2
  • FeCl3
NOCl is used as a bleaching agent & storilisng agent It can be synthesized by action of
  • NaCl with H2O
  • NH4Cl with NaOH
  • Cl2 with cold & dilute NaOH
  • Cl2 with hot & Conc. NaOH
A one litre flask is full of brown bromine vapour intensity of brown colour of vapour will not decrease a appriciable on adding to flask some of
  • Pieces of marble
  • Carbon disulphide
  • Carbon tetrachloride
  • Animal Charcoal Powder
Which of following statement is correct?
  • Only Cl & Br forms Oxyacids
  • All halogen form oxyacid
  • All halogen except F. form oxyacid
  • Only iodine form oxyacid
A mixture of ZnCl2 and PbCl 2 can be separated by
  • Distillation
  • Crystallization
  • Sublimation
  • Adding aceticacid
Hydrogen has a tendency to gain one e– to acquire helium configuration. In this respect it resembles.
  • Halogens
  • Actinides
  • Transition metals
  • Alkali metals
The compound added to table salt for maintaining proper health is
  • KCl
  • KBr
  • NaI
  • MgBr2
Which of following halogen can be purified by sublimation?
  • F2
  • Cl2
  • Br2
  • I2
Which statement is not true ?
  • Ni(CO)4 is diamagnetic
  • BI3 is strong Lewis acid than BI3
  • Graphite conducts electricity where as diamond does not
  • CCl4 is hydrolysed where as BCl3 is inert
Bleaching Powder loser its power On keeping for long time because
  • It changes to calcium hypochlorate
  • It changes to calcium chloride & calicium hydroxide
  • It absorbs moisture
  • It changes to CaCl2 & calcium chlorate
Compound that forms dative bond with ammonia
  • CCl4
  • BCl3
  • MgCl2
  • NaCl
Concentrated H2SO4 can not be used to prepare HBr from NaBr because it
  • Reduces HBr
  • Oxidises HBr
  • Reacts slowly
  • None of above
When Fluoride is heated with conc. H2SO4 and MnO2 the gas evolved is
  • F2
  • SF
  • HF
  • None
Unlike other halogens Fluorine does not show higher oxidation states because
  • It is highly electionegative
  • It has no d – orbital
  • Atomic radius is very small
  • None of Above
Which of following molecule is theoratically not possible
  • OF4
  • OF2
  • SF4
  • O2F2
I is released when potassium iodide reacts with
  • ZnSO4
  • CaSO4
  • FeSO4
  • NH4SO4

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    Chemistry-Class 12 p Block Elements-2862.png

  • Chemistry-Class 12 p Block Elements-2863.png

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