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: A

Question. Oleum is
(a) fuming H₂SO₄
(b) castor Oil
(c) oil of vitriol
(d) None of them

Answer: A

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: A

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: A

Question. Sulphuric acid reacts with PCl₅ to give
(a) sulphuryl chloride
(b) thionyl chloride
(c) sulphur monochloride
(d) sulphur tetrachloride

Answer: A

Question. Which one of the following reacts with conc. H₂SO₄?
(a) Ag
(b) Pb
(c) Au
(d) Pt

Answer: A

Question. The number of dative bonds in sulphuric acid molecule is
(a) 2
(b) 0
(c) 1
(d) 4

Answer: A

Question. Which characteristic is not correct about H₂SO₄
(a) Reducing agent
(b) Sulphonating agent
(c) Oxidising agent
(d) Highly viscous

Answer: A

Question. Among F, Cl, Br and I the lowest ionization potential will be of
(a) iodine
(b) chlorine
(c) fluorine
(d) bromine

Answer: A

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: A

Question. The outer electronic structure of 3s² 3p⁵ is possessed by
(a) Cl
(b) Ar
(c) O
(d) Br

Answer: A

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: A

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: A

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: A

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: A

Question. Which of the following halogen does not exhibit positive oxidation state in its compounds?
(a) F
(b) Br
(c) Cl
(d) I

Answer: A

Question. The halogen that is most easily reduced is
(a) F₂
(b) Br₂
(c) Cl₂
(d) I₂

Answer: A

Question. Which one of the following elements shows more than one oxidation states ?
(a) Chlorine
(b) Sodium
(c) Fluorine
(d) Potassium

Answer: A

Question. Which of the following halogens exhibit only one oxidation state in its compounds
(a) Fluorine
(b) Bromine
(c) Iodine
(d) Chlorine

Answer: A

Question. Among the following which is the strongest oxidising agent
(a) F₂
(b) I₂
(c) Br₂
(d) Cl₂

Answer: A

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: A

Question. Which is the weakest out of HF, HCl, HBr and HI
(a) HF
(b) HBr
(c) HCl
(d) HI

Answer: A

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

Answer: A

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: A

Question. The bleaching action of chlorine is due to
(a) oxidation
(b) hydrogenation
(c) reduction
(d) chlorination

Answer: A

Question. Cl₂ reacts with hot and conc. NaOH to give
(a) NaClO₃
(b) NaClO₄
(c) NaClO
(d) NaClO₂

Answer: A

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: A

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: A

Question. Hydrochloric acid at 25ºC is
(a) None of these
(b) covalent and liquid
(c) ionic and liquid
(d) ionic and gas

Answer: A

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: A

Question. Which one is most stable to heat
(a) HClO₄
(b) HClO₂
(c) HClO
(d) HClO₃

Answer: A

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: A

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: A

Question. The hybridization in ICl₇ is
(a) sp³d³
(b) sp³d
(c) d²sp³
(d) None of these

Answer: A

Question. Which one of the following noble gases is not found in the atmosphere
(a) Rn
(b) Ne
(c) Kr
(d) Ar

Answer: A

Question. The last member of the family of inert gases is
(a) radon
(b) neon
(c) argon
(d) xenon

Answer: A

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: A

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: A

Question. Number of unpaired electrons in inert gas is
(a) zero
(b) 4
(c) 8
(d) 18

Answer: A

Question. In the following four elements, the ionisation potential of which one is the highest
(a) Argon
(b) Cesium
(c) Oxygen
(d) Barium

Answer: A

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: A

Question. Which of the following noble gas is least polarisable
(a) He
(b) Ar
(c) Xe
(d) Ne

Answer: A

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: A

Question. The most abundant inert gas in the atmosphere is
(a) Ar
(b) He
(c) Ne
(d) Kr

Answer: A

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: A

Question. Which of the noble gas has highest polarisability
(a) Xe
(b) Ar
(c) He
(d) Kr

Answer: A

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: A

Question. Which of the following noble gases has the highest positive electron gain enthalpy value?
(a) Neon
(b) Krypton
(c) Helium
(d) Argon

Answer: A

Question. Which inert gas show abnormal behaviour on liquefaction
(a) He
(b) Kr
(c) Xe
(d) Ar

Answer: A

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: A

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: A

Question. Which one of the following elements is most reactive
(a) Xe
(b) Ne
(c) He

Answer: A

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: A

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: A

Question. Total number of lone pair of electrons in XeOF₄ is
(a) 1
(b) 3
(c) 0
(d) 2

Answer: A

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: A

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: A

Question. The shape of XeO₂F₂ molecule is
(a) see-saw
(b) square planar
(c) trigonal bipyramidal
(d) tetrahedral

Answer: A

Question. XeF₄ on partial hydrolysis produces
(a) XeOF₂
(b) XeO₃
(c) XeF₄
(d) XeOF₄

Answer: A

Question. Which element out of He, Ar, Kr and Xe forms least number of cmpounds ?
(a) He
(b) Ar
(c) Xe
(d) Kr

Answer: A

Question. The element which has not yet been reacted with F₂ is
(a) Ar
(b) Kr
(c) Xe
(d) Rn

Answer: A

Question. XeF₆ on complete hydrolysis gives
(a) XeO₃
(b) Xe
(c) XeO₂
(d) XeO₄

Answer: A

Question. XeF₄ involves which hybridization
(a) sp₃d₂
(b) sp²
(c) sp
(d) None of these

Answer: A

Question. Shape of XeOF₄ is
(a) square pyramidal
(b) T-shaped
(c) octahedral
(d) pyramidal

Answer: A

Question. The hybridization of Xe in XeF₂ is
(a) sp³ d
(b) sp³
(c) sp²
(d) None of these

Answer: A

Question. Which is a planar molecule ?
(a) XeF₄
(b) XeO₂F₂
(c) XeO₄
(d) XeOF₄

Answer: A

Question. Which of the following has sp³ hybridization
(a) XeO³
(b) XeF⁴
(c) BCl³
(d) BBr₃

Answer: A

Question. The number of lone pair of electrons present on Xe in XeF₂ is
(a) 3
(b) 4
(c) 1

Answer: A

Question. Hybridization and structure of XeF₄ is
(a) sp³d², square planar
(b) sp³d², hexagonal
(c) sp³, tetrahedral
(d) None of these

Answer: A

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: A

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: A

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: A

Question. The geometry of XeF₆ is
(a) distorted octahedron
(b) planar hexagon
(c) regular octahedron
(d) square bipyramid

Answer: A

Question.  Trigonal bipyramidal geometry is shown by
(a) XeO₃F₂
(c) FXeOSO₂F
(d) None of these

Answer: A

Question. Which has trigonal bipyramidal shape
(a) XeO₃
(b) XeOF₂
(c) XeOF₄
(d) None of these

Answer: A