JEE Chemistry The P Block Elements MCQs Set D

Question: The acid which has a peroxy linkage is

• a) Caro’s acid
• b) Pyrosulphuric acid
• c) Sulphurous acid
• d) Dithionic acid

Answer: Caro’s acid

Question: S – S bond is not present in

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Oleum is

• a) fuming H₂SO₄
• b) castor Oil
• c) oil of vitriol
• d) None of them

Answer: fuming H₂SO₄

Question: On addition of conc. H₂SO₄ to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet fumes come out. This is because

• a) HI gets oxidised to I₂
• b) HI changes to HIO₃
• c) HI is of violet colour
• d) H₂SO₄ reduces HI to I₂

Answer: HI gets oxidised to I₂

Question: Which of the following are peroxoacids of sulphur?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Hot conc. H₂SO₄ acts as moderately strong oxidising agent. It oxidises both metals and nonmetals. Which of the following element is oxidised by conc. H2SO₄ into two gaseous products?

• a) C
• b) Cu
• c) S
• d) Zn

Answer: C

Question: Caro’s acid is

• a) H₂SO₅
• b) H₂SO₃
• c) H₃S₂O₅
• d) None of these

Answer: H₂SO₅

Question: Sulphuric acid reacts with PCl₅ to give

• a) sulphuryl chloride
• b) thionyl chloride
• c) sulphur monochloride
• d) sulphur tetrachloride

Answer: sulphuryl chloride

Question: Which one of the following reacts with conc. H₂SO₄?

• a) Ag
• b) Pb
• c) Au
• d) Pt

Answer: Ag

Question: The number of dative bonds in sulphuric acid molecule is

• a) 2
• b) 0
• c) 1
• d) 4

Answer: 2

Question:

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which characteristic is not correct about H₂SO₄

• a) Reducing agent
• b) Sulphonating agent
• c) Oxidising agent
• d) Highly viscous

Answer: Reducing agent

Question: Among F, Cl, Br and I the lowest ionization potential will be of

• a) iodine
• b) chlorine
• c) fluorine
• d) bromine

Answer: iodine

Question: The electronegativity follows the order

• a) F > O > Cl > Br
• b) O > F > Cl > Br
• c) F > Cl > Br > O
• d) Cl > F > O > Br

Answer:  F > O > Cl > Br

Question:

• a) I₂
• b) Cl₂
• c) Br₂
• d) F₂

Answer: I₂

Question: The outer electronic structure of 3s² 3p⁵ is possessed by

• a) Cl
• b) Ar
• c) O
• d) Br

Answer: Cl

Question: Electron gain enthalpy with negative sign of fluorine is less than that of chlorine due to

• a) Smaller size of fluorine atom
• b) Bigger size of 2p orbital of fluorine
• c) Smaller size of chlorine atom
• d) High ionization enthalpy of fluorine

Answer: Smaller size of fluorine atom

Question: Which one of the following order is correct for the bond energies of halogen molecules ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: The correct order of reactivity of halogens with alkalies is

• a) F > Cl > Br > I
• b) F < Cl < Br < I
• c) F < Cl > Br < I
• d) F < Cl < Br > I

Answer: F > Cl > Br > I

Question: The correct order of increasing oxidising power is

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

More Questions.............................................

Question: Fluorine is a stronger oxidising agent than chlorine in aqueous solution. This is attributed to many factors except

• a) ionisation potential
• b) electron affinity
• c) heat of dissociation
• d) heat of hydration

Answer: ionisation potential

Question: Fluorine exhibits an oxidation state of only –1 because

• a) it is very strongly electronegative
• b) it is a non-metal
• c) it belongs to halogen family
• d) it can readily accept an electron

Answer: it is very strongly electronegative

Question: Which of the following halogen does not exhibit positive oxidation state in its compounds?

• a) F
• b) Br
• c) Cl
• d) I

Answer: F

Question: The halogen that is most easily reduced is

• a) F₂
• b) Br₂
• c) Cl₂
• d) I₂

Answer: F₂

Question: Which one of the following elements shows more than one oxidation states ?

• a) Chlorine
• b) Sodium
• c) Fluorine
• d) Potassium

Answer: Chlorine

Question: Which of the following halogens exhibit only one oxidation state in its compounds

• a) Fluorine
• b) Bromine
• c) Iodine
• d) Chlorine

Answer: Fluorine

Question:

• a) Both oxidized and reduced
• b) Proton acceptor only
• c) Oxidized only
• d) Reduced only

Answer: Both oxidized and reduced

Question: Among the following which is the strongest oxidising agent

• a) F₂
• b) I₂
• c) Br₂
• d) Cl₂

Answer: F₂

Question: The correct order of heat of formation of halogen acids is

• a) HF > HCl > HBr > HI
• b) HCl > HBr > HF > HI
• c) HCl > HF > HBr > HI
• d) None of these

Answer: HF > HCl > HBr > HI

Question: Which is the weakest out of HF, HCl, HBr and HI

• a) HF
• b) HBr
• c) HCl
• d) HI

Answer: HF

Question: Which of the following is most volatile ?

• a) HCl
• b) HI
• c) HBr
• d) HF

Answer: HCl

Question: At room temperature, HCl is a gas while HF is a low boiling liquid. This is because

• a) HF has hydrogen bond
• b) H- F bond is ionic
• c) H- F bond is covalent
• d) HF has metallic bond

Answer: HF has hydrogen bond

Question: The bleaching action of chlorine is due to

• a) oxidation
• b) hydrogenation
• c) reduction
• d) chlorination

Answer: oxidation

Question: Cl₂ reacts with hot and conc. NaOH to give

• a) NaClO₃
• b) NaClO₄
• c) NaClO
• d) NaClO₂

Answer: NaClO₃

Question: When chlorine reacts with cold and dilute solution of sodium hydroxide, the products obtained are

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Chlorine is liberated when we heat

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following is used in the preparation of chlorine?

• a) Either MnO₂ or KMnO₄
• b) Both MnO₂ and KMnO₄
• c) Only KMnO₄
• d) Only MnO₂

Answer: Either MnO₂ or KMnO₄

Question: The reaction of KMnO₄ and HCl results in

• a) reduction of Mn in KMnO₄ and production of Cl₂
• b) oxidation of Mn in KMnO₄ and production of H₂
• c) reduction of Mn in KMnO₄ and production of H₂
• d) oxidation of Mn in KMnO₄ and production of Cl₂

Answer: reduction of Mn in KMnO₄ and production of Cl₂

Question: Bleaching powder on standing forms mixture of

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Hydrochloric acid at 25ºC is

• a) None of these
• b) covalent and liquid
• c) ionic and liquid
• d) ionic and gas

Answer: None of these

Question: Gaseous HCl is a poor conductor of electricity while its aqueous solution is a good conductor this is because

• a) HCl ionises in aqueous solution
• b) HCl gas does not obey Ohm’s law, whereas the solution does
• c) a gas cannot conduct electricity but a liquid can
• d) H₂O is a good conductor of electricity

Answer:  HCl ionises in aqueous solution

Question: Which one is most stable to heat

• a) HClO₄
• b) HClO₂
• c) HClO
• d) HClO₃

Answer: HClO₄

Question: Interhalogen compounds are more reactive than the individual halogen because

• a) their bond energy is less than the bond energy of the halogen molecule
• b) they carry more energy
• c) they are more ionic
• d) two halogens are present in place of one

Answer: their bond energy is less than the bond energy of the halogen molecule

Question: Which of the following is not the characteristic of interhalogen compounds

• a) They have low boiling points and are highly volatile
• b) They are covalent in nature
• c) They are quite unstable but none of them is explosive
• d) They are more reactive than halogens

Answer: They have low boiling points and are highly volatile

Question: The hybridization in ICl₇ is

• a) sp³d³
• b) sp³d
• c) d²sp³
• d) None of these

Answer: sp³d³

Question: In which of the following reactions chlorine is both reduced and oxidized?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Which of the following is observed when Cl₂ reacts with hot and concentrated NaOH?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Which one of the following noble gases is not found in the atmosphere

• a) Rn
• b) Ne
• c) Kr
• d) Ar

Answer: Rn

Question: The last member of the family of inert gases is

• a) radon
• b) neon
• c) argon
• d) xenon

Answer: radon

Question: Which of the following is the correct sequence of the noble gases in their group in the periodic table?

• a) He, Ne, Ar, Kr, Xe, Rn
• b) He, Ar, Ne, Kr, Xe, Rn
• c) Ar, He, Kr, Ne, Rn, Xe
• d) He, Ne, Kr, Ar, Xe, Rn

Answer: He, Ne, Ar, Kr, Xe, Rn

Question: Which of the following noble gases do not have an octet of electrons in its outermost shell?

• a) Helium
• b) Radon
• c) Neon
• d) Argon

Answer: Helium

Question: Number of unpaired electrons in inert gas is

• a) zero
• b) 4
• c) 8
• d) 18

Answer: zero

Question: In the following four elements, the ionisation potential of which one is the highest

• a) Argon
• b) Cesium
• c) Oxygen
• d) Barium

Answer: Argon

Question: Gradual addition of electronic shells in the noble gases causes a decrease in their

• a) ionisation energy
• b) boiling point
• c) atomic radius
• d) density

Answer: ionisation energy

Question: Which of the following noble gas is least polarisable

• a) He
• b) Ar
• c) Xe
• d) Ne

Answer: He

Question: In which of the following groups, when He is placed, its all the properties are satisfied

• a) with inert gases
• b) with alkali metals
• c) with halogens
• d) None of these

Answer: with inert gases

Question: The most abundant inert gas in the atmosphere is

• a) Ar
• b) He
• c) Ne
• d) Kr

Answer: Ar

Question: The lowest boiling point of helium is due to its

• a) weak van der Waal’s forces between atoms
• b) high polarisability
• c) gaseous nature
• d) inertness

Answer: weak van der Waal’s forces between atoms

Question: Which of the noble gas has highest polarisability

• a) Xe
• b) Ar
• c) He
• d) Kr

Answer: Xe

Question: The noble gas which was discovered first in the sun and then on the earth

• a) helium
• b) xenon
• c) argon
• d) neon

Answer: helium

Question: A radioactive element X decays to give two inert gases X is

• a)

  

• b)

  

• c) Both
• d) None of these

Answer:

Question: Which of the following noble gases has the highest positive electron gain enthalpy value?

• a) Neon
• b) Krypton
• c) Helium
• d) Argon

Answer: Neon

Question: Which inert gas show abnormal behaviour on liquefaction

• a) He
• b) Kr
• c) Xe
• d) Ar

Answer: He

Question: The ease of liquefaction of noble gases increases in the order

• a) He < Ne < Ar < Kr < Xe
• b) Xe < Kr < Ne < Ar < He
• c) Kr < Xe < He < Ne < Ar
• d) Ar < Kr < Xe < Ne < He

Answer: He < Ne < Ar < Kr < Xe

Question: The correct order of solubility in water for He, Ne, Ar, Kr, Xe is

• a) Xe > Kr > Ar > Ne > He
• b) Ar > Ne > He > Kr > Xe
• c) Ne > Ar > Kr > He > Xe
• d) He > Ne > Ar > Kr > Xe

Answer: Xe > Kr > Ar > Ne > He

Question: Which one of the following elements is most reactive

• a) Xe
• b) Ne
• c) He
• d) He

Answer: Xe

Question: Noble gases are group of elements which exhibit very

• a) low chemical activity
• b) minimum electronegativity
• c) much paramagnetic properties
• d) high chemical activity

Answer: low chemical activity

Question: In XeF₂, XeF₄, XeF₆ the number of lone pairs on Xe are respectively

• a) 3, 2, 1.
• b) 1, 2, 3
• c) 2, 3, 1
• d) 4, 1, 2

Answer: 3, 2, 1.

Question: Total number of lone pair of electrons in XeOF₄ is

• a) 1
• b) 3
• c) 0
• d) 2

Answer: 1

Question: Noble gases do not react with other elements because

• a) they have completely filled valence shell (ns²np⁶)
• b) the sizes of their atoms are very small
• c) they are not found in abundance
• d) they are monoatomic

Answer: they have completely filled valence shell (ns²np⁶)

Question: Which one of the following reactions of xenon compounds is not feasible?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Which of the following has maximum number of lone pairs associated with Xe

• a) XeF₂
• b) XeF₄
• c) XeF₆
• d) None of these

Answer: XeF₂

Question: The shape of XeO₂F₂ molecule is

• a) see-saw
• b) square planar
• c) trigonal bipyramidal
• d) tetrahedral

Answer: see-saw

Question: XeF₄ on partial hydrolysis produces

• a) XeOF₂
• b) XeO₃
• c) XeF₄
• d) XeOF₄

Answer: XeOF₂

Question: Which element out of He, Ar, Kr and Xe forms least number of cmpounds ?

• a) He
• b) Ar
• c) Xe
• d) Kr

Answer: He

Question: The element which has not yet been reacted with F₂ is

• a) Ar
• b) Kr
• c) Xe
• d) Rn

Answer: Ar

Question: XeF₆ on complete hydrolysis gives

• a) XeO₃
• b) Xe
• c) XeO₂
• d) XeO₄

Answer: XeO₃

Question: XeF₄ involves which hybridization

• a) sp₃d₂
• b) sp²
• c) sp
• d) None of these

Answer: sp₃d₂

Question: Shape of XeOF₄ is

• a) square pyramidal
• b) T-shaped
• c) octahedral
• d) pyramidal

Answer: square pyramidal

Question: The hybridization of Xe in XeF₂ is

• a) sp³ d
• b) sp³
• c) sp²
• d) None of these

Answer: sp³ d

Question: Which is a planar molecule ?

• a) XeF₄
• b) XeO₂F₂
• c) XeO₄
• d) XeOF₄

Answer: XeF₄

Question: Which of the following has sp³ hybridization

• a) XeO³
• b) XeF⁴
• c) BCl³
• d) BBr₃

Answer: XeO³

Question: The number of lone pair of electrons present on Xe in XeF₂ is

• a) 3
• b) 4
• c) 1
• d) 3

Answer: 3

Question: Hybridization and structure of XeF₄ is

• a) sp³d², square planar
• b) sp³d², hexagonal
• c) sp³, tetrahedral
• d) None of these

Answer: sp³d², square planar

Question: Number of lone pairs of electrons on Xe atoms XeF₂, XeF₄ and XeF₆ molecules are respectively

• a) 3, 2 and 1
• b) 2, 3 and 1
• c) 4, 3 and 2
• d) 3, 2 and 0

Answer: 3, 2 and 1

Question: Which one of the following is correct pair with respect to molecular formula of xenon compound and hybridization state of Xenon in it?

• a) XeF₂, sp³d
• b) XeF₄, sp³
• c) XeF₂, sp
• d) None of these

Answer: XeF₂, sp³d

Question: Which statement about noble gases is not correct

• a) Kr is obtained during radioactive disintegration
• b) He has the lowest b.pt among all the noble gases
• c) Ar is used in electric bulbs
• d) Xe forms XeF₆

Answer: Kr is obtained during radioactive disintegration

Question: The geometry of XeF₆ is

• a) distorted octahedron
• b) planar hexagon
• c) regular octahedron
• d) square bipyramid

Answer: distorted octahedron

Question:  Trigonal bipyramidal geometry is shown by

• a) XeO₃F₂
• b) XeO₃F₂
• c) FXeOSO₂F
• d) None of these

Answer: XeO₃F₂

Question: Which has trigonal bipyramidal shape

• a) XeO₃
• b) XeOF₂
• c) XeOF₄
• d) None of these

Answer: XeO₃