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 An electron of mass ‘m’ is confined to a one dimensional box of length ‘b’. If it makes a
radioactive transition from second excited state to the ground state, the frequency of the
photon emitted is-
(a) 9h2/ mb2
(b) 3h2/ 8mb2
(c) h/ mb2
(d) 2h/ 8mb2
ANS: (c)
 The function eax2 (a > 0) is not an acceptable wave function for bound system because –
(a) It is not continuous
(b) it is multi- valued
(c) it is not normalizable
(d) all of these
ANS: (d)
 Among the following, the isoelectronic and isostructural pair is-
(a) CO2 & SO2
(b) SO3 & SeO2
(c) NO2
+ & TeO2
(d) SiO4
4- & PO4
3-
ANS: (d)

 The HOMO of HF is-
(a) bonding
(b) antibonding
(c) ionic
(d) non- bonding
ANS: (a)
 The bond angle of Cl2O is-
(a) smaller than F2O
(b) greater than H2O
(c) Smaller than H2O
(d) same as that of H2O
ANS: (b)
 The species which has a square planar structure is-
(a) BF4
-
(b) FeCl4
–
(c) SF4
(d) XeF4
ANS: (d)

 Icosahedral structure is generally exhibited by-
(a) C
(b) Si
(c) Ge
(d) B
ANS: (d)
[XeO6]-4 is octahedral whereas XeF6 is distorted one, because-
(a) F is more electronegative than O
(b) Xe has a lone pair in XeF6
(c) XeF6 is neutral but [XeO6]-4 is anionic
(d) Xe-F bond has more ionic characters
ANS: (b)
 The ground state term symbol for high spin d5s1 & d5 configuration respectively are-
(a) S3 & S6
(b) P6 & S3
(c) S7 & S6
(d) P7 & S6
ANS: (c)

 The Xenon compounds that are isostructural with IBr2
- & BrO3
- respectively are –
(a) linear XeF2 & pyramidal XeO3
(b) bent XeF2 & pyramidal XeO3
(c) bent XeF2 & planar XeO3
(d) linear XeF2 & tetrahedral XeO3
ANS: (a)
 The reaction of solid XeF2 with AsF5 in 1:1 ratio affords-
(a) XeF4 & AsF3
(b) XeF6 & AsF3
(c) [XeF]+ [AsF6]-
(d) [Xe2F3]+ [AsF6]-
ANS: (c)
 White phosphorous P4 belongs to the-
(a) Closo- borane
(b) nido system
(c) arachno system
(d) hypo system
ANS: (b)

 Jahn- Teller distortion of CuSO4 . 5H2O acts to-
(a)raise the symmetry
(b) remove electronic degeneracy
(c) Cause loss of H2O ligand
(d) promote a 'd‘ electron to an antibonding molecular orbital
ANS: (b)
 The complex that exists as a pair of enantiomer is-
(a) trans-[Co(H2NCH2CH2NH2)2Cl2]+
(b)cis- [Co(NH3)4Cl2]+
(c) [Pt(PPh3)(Cl)(Br)(CH3)]-
(d) [Co(H2NCH2CH2NH2)3]+3
ANS: (d)
 The correct statement about the Cu-N bond distances in [Cu(NH3)6]+2 is-
(a) All the bond distances are equal
(b) the axial bonddistances are longer than the equatorial ones
(c) the equatorial bond distances are longer than the axial ones
ANS: (b)

 The existance of two different coloured complexes of Co(NH3)4Cl2 is due to-
(a) Optical isomerism
(b) linkage isomerism
(c) geometrical isomerism
(d) coordination isomerism
ANS: (c)
 The compound which exhibits Jahn- Teller distortion-
(a) [Mn(H2O)6]+2
(b) [Mn(H2O)6]+3
(c) [Cr(H2O)6]+3
(d) [Fe(CN)6]-4
ANS: (b)
 The compound which shows L←M charge transfer is-
(a) Ni(CO)4
(b) K2Cr2O7
(c) HgO
(d) [Ni(H2O)6]+2
ANS: (a)

 The number of absorption bands observed in [FeF6]-3 & [CoF6]-3 respectively are-
(a) 1 & 3
(b) 0 & 1
(c) 0 & 3
(d) 3 & 1
ANS: (b)
 An electron is found in an orbital with one radial node and two angular nodes. Which
orbital the electron is in-
(a) 1s
(b) 2p
(c) 3d
(d) 4d
ANS: (d)
 Which one of the following has the highest lattice energy-
(a) LiCl
(b) CaCl2
(c) LiF
(d) KCl
ANS: (b)

 The fluoride, whose value of dipole moment is not equal to zero is-
(a) XeF4
(b) CF4
(c) SF4
(d) PF5
ANS: (c)
 The compound having the highest m.p is-
(a) LiCl
(b) LiF
(c) LiI
(d) LiBr
ANS: (b)
 The shape of SF4 is-
(a) td
(b) tbp
(c) sq. Planar
(d) Oh
ANS: (a)

 The decreasing order of the (I.E)1 of the following element is-
(a) Xe> Be> As> Al
(b) Xe> As> Al> Be
(c) Xe> As> Be> Al
(d) Xe> Be> Al> As
ANS: (c)
 The species having angular shape is-
(a) BeF2
(b) NO2
-
(C) CH2O
(d) XeF4
ANS: (b)
 The number of microstates for p2 configuration is-
(a) 45
(b) 15
(c) 25
(d) 10
ANS: (b)

 BrO3
- is isostructural with a noble gas species-
(a) XeO3
(b) XeF3
(c) XeF4
(d) XeO2
ANS: (a)
 The correct order of bond angle in BF3, NH3, NF3 & PH3 are-
(a) BF3 > NH3 > NF3 > PH3
(b) PH3 > BF3 > NF3 > NH3
(c) BF3 > PH3 > NH3 > NF3
(d) NH3 > NF3 > BF3 > PH3
ANS: (a)
 In which of the following pairs the species have similar geometry-
(a) CO2 & SO2
(b) CO3
- & SO3
-2
(c) NH3 & BH3
(d) SO4
-2 & ClO4
-
ANS: (d)

 Among Ar, NH4Cl, HF & HCl, the strength of inter atomic or intermolecular forces follow
the order-
(a) NH4Cl> HF> HCl> Ar
(b) HF> HCl> Ar> NH4Cl
(c) HCl> Ar> NH4Cl> HF
(d) Ar> NH4Cl> HF> HCl
ANS: (a)
 The most polar compound amoung the following is-
(a) SF4
(b) BF3
(c) XeF4
(d) SO3
ANS: (a)
 The most probable oxidation states of both Cr & Mo are-
(a) +2, +3, +4
(b) +2, +3, +5
(c) +2, +3,+6
(d) +3, +4, +5
ANS: (c)

 The correct order of acidic character is-
(a) Al2O3 > MgO > SiO2 > P4O10
(b) P4O10 > Al2O3 > MgO > SiO2
(c) P4O10 > SiO2 > Al2O3 > MgO
(d) SiO2 > P4O10 > Al2O3 > MgO
ANS: (c)
 If the values of Madelung constant of the following compounds are equal, then their
lattice energy value decreases in order-
(a) KCl > NaF > CaO> Al2O3
(b) Al2O3 > CaO > NaF > KCl
(c) NaF > KCl > CaO > Al2O3
(d) Al2O3 > Cao > KCl > NaF
ANS: (b)
 The correct order of the mean bond energies in following binary hydrides are-
(a) CH4 > NH3 > H2O >HF
(b) NH3 > CH4 > H2O > HF
(c) HF > H2O > CH4 > NH3
(d) HF > H2O > NH3 > CH4
ANS: (d)

 The atomicity and the total number of bond in the elemental white P molecule
respectivily are-
(a) 4 & 6
(b) 6 & 4
(c) 4 & 4
(d) 6 & 6
ANS:(a)
 The avarage value of C-C bond order in graphite is-
(a) 1,
(b) 3/2
(c) 3/4
(d) 4/3
ANS: (c)
 The dipole moment of the molecule HF, NH3 , H2O , CO2 & H2S increases in the order of-
(a) HF < H2O < NH3 < H2S < CO2
(b) CO2 < H2O < HF < H2S < NH3
(c) CO2 < HF < H2O < NH3 < H2S
(d) CO2 < H2S < NH3 < H2O < HF
ANS: (d)

 About the activity of alkaline earth metal as reducing agent, which of the following
statements are true?
(a) It decreases from Be to Ba
(b) it increases from Be to Ba
(c) it increases from Be to Ca & decreases from Ca to Ba
(d) it decreases from Be to Ca & increases from Ca to Ba
ANS: (c)
 Among the compounds A-D, those which hydrolyse easily are-(A) NCl3 (B) NF3 (C)
BiCl3 (D) PCl3
(a) A & B only
(b) A, C & D
(c) B, C & D
(D) A, B & C
ANS: (b)
 Among the following, an example of a hypervalent species is-
(a) BF3. OEt2
(b) SF4
(c) PF6
-
(d) Sb2S3
ANS: (c)

 The pair of solvent in which PCl5 does not ionize is-
(a) CH3CN, CH3NO2
(b) CH3CN, CCl4
(c) C6H6 , CCl4
(d) CH3CN, C6H6
ANS:(c)
 Among the halides NCl3 (A), PCl3 (B), AsCl3 (C) , those which produce two different acids
upon hydrolysis are-
(a) A & B
(b) A & C
(c) B & C
(d) A, B & C
ANS:(c)
 Triphosphazene is prepared by reacting X & Y in equimolar ratio at 120 ̊- 150 ̊ using
appropriate solvents-
(a) PCl3 & NH3
(b) PCl5 & NH3
(c) PCl5 & NH4Cl
(d) PCl3 & NH4Cl
ANS:(c)

 Pyroxenes are class of silicate minerales which exhibit a polymeric chain structure, its
simplest repeating unit is-
(a) [SiO4]-4
(b) [SiO3]-2
(c) [Si2O7]-6
(d) [Si4O11]-6
ANS: (b)
 Which of the following does not exhibit paramagnetism-
(a) NO
(b) NO2
(c) ClO2
(d) ClO2
-
ANS: (b)
 In which of the following, the hybridisation of central atom is other than sp3d
(a) PF5
(b) SF4
(c) IF5
(d) I3
+
ANS: (c)

 Which compound will produce N2 on thermal decomposition-
(a) NH4NO2
(b) (NH4)2Cr2O7
(c) NaN3
(d) All of these
ANS: (d)
 The bond angle of NF3 (102.3 ̊ ) is smaller than NH3 (107.2 ̊ ). This is because-
(a) Large size of F compared to H
(b) Large size of N compared to H
(c) Opposite polarity of N in the two molecules
(d) Smaller size of H compared to N
ANS: (c)

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