Chemical Bonding and Molecular Structure Free Question Bank
In allene (C3H4), the type(s) of hybridisation of the carbon atoms is (are) [IIT JEE 2012]
A sp and sp3B sp and sp2
C Only sp2
D sp2 and sp3
E NA
The sp3d2 hybridization of central atom of a molecule would lead to [West Bengal JEE 2011]
A square planar geometryB Tetrahedral geometry
C Trigonal bipyramidal geometry
D Octahedral geometry
E NA
Hybridization of C2 and C3 of H3C – CH = C = CH – CH3 are [West Bengal JEE 2011]
A Sp, Sp3B Sp2, Sp
C Sp2, Sp2
D Sp, Sp
E NA
Which one of the following is paramagnetic? [West Bengal JEE 2011]
A N2B NO
C CO
D O3
E NA
Among the following the maximum covalent character is shown by the compound [AIEEE 2011]
A MgCl2B FeCl2
C SnCl2
D AlCl3
E NA
The state of hybridization of the central atom and the number of lone pairs over the central atom in POCl 3 are [WB JEE 2012]
A sp, 0B sp 2 , 0
C sp 3 , 0
D dsp 2 , 1
E NA
NiCl2{P(C2H5)2(C6H5)}2 exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of Ni2+ in the paramagnetic and diamagnetic states are respectively [IIT JEE 2012]
A tetrahedral and tetrahedralB square planar and square planar
C tetrahedral and square planar
D square planar and tetrahedral
E NA
When O2 is converted into O2+ [Karnataka CET 2011]
A both paramagnetic character and bond order increaseB bond order decreases
C paramagnetic character increases
D paramagnetic character decreases and the bond order increases
E NA
Which one of the following conversions involve change in both hybridization and shape? [Karnataka CET 2010]
A NH3 → NH4+B CH4 → C2H6
C H2O → H3O+
D BF3 → BF4–
E NA
Dipole-induced dipole interactions are present in which of the following pairs? [NEET 2013]
A H2O and alcoholB Cl2 and CCl4
C HCl and He atoms
D SiF4 and He atoms
E NA
Which of the following is paramagnetic? [NEET 2013]
A COB O2–
C CN–
D NO+
E NA
Which one of the following molecules contains no p bond? [NEET 2013]
A CO 2B H 2O
C SO 2
D NO 2
E NA
Which of the following is a polar molecule? [NEET 2013]
A BF3B SF4
C SiF4
D XeF4
E NA
The outer orbitals of C in ethene molecule can be considered to be hybridized to give three equivalent sp 2 orbitals. The total number of sigma ( s ) and pi ( p ) bonds in ethene molecule is [NEET 2013]
A 1 sigma ( s ) and 2 pi ( p ) bondsB 3 sigma ( s ) and 2 pi ( p ) bonds
C 4 sigma ( s ) and 1 pi ( p ) bonds
D 5 sigma ( s ) and 1 pi ( p ) bonds
E NA
The species having bond order different from that in CO is
A NO−B NO+
C CN−
D N2
E NA
In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
A C2 → C2+B NO → NO+
C O2 → O2+
D N2 → N2+
E NA
Which of the following hydrogen bonds is the strongest?
A O − H ··· NB F − H ··· F
C O − H ··· O
D O − H ··· F
E NA
Which of the following species exhibits the diamagnetic behaviour?
A O22−B O2+
C O2
D NO
E NA
(I) 1, 2-dihydroxy benzene (II) 1, 3-dihydroxy benzene (III) 1, 4-dihydroxy benzene (IV) Hydroxy benzene The increasing order of boiling points of above mentioned alcohols is
A I < II < III < IVB I < II < IV < III
C IV < I < II < III
D IV < II < I < III
E NA
Which of the following contains maximum number of lone pairs on the central atom?
A ClO3−B XeF4
C SF4
D I3−
E NA
Which one of the following species is diamagnetic in nature?
A He2+B H2
C H2+
D H2−
E NA
Number of lone pair(s) in XeOF4 is/are
A 0B 1
C 2
D 3
E NA
The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively:
A sp2 and sp2B sp2 and sp3
C sp3 and sp2
D sp3 and sp3
E NA
Which one of the following does not have sp2 hybridised carbon?
A AcetoneB Acetic acid
C Acetonitrile
D Acetamide
E NA
Which one of the following pairs of molecules will have permanent dipole moments for both members?
A SiF4 and NO2B NO2 and CO2
C NO2 and O3
D SiF4 and CO2
E NA
In which of the following molecules/ions are all the bonds are not equal?
A SF4B SiF4
C XeF4
D BF4−
E NA
Which of the following molecules/ions does not contain unpaired electrons?
A O22–B B2
C N2+
D O2
E NA
An atom of an element A has three electrons in its outermost orbit and that of B has six electrons in its outermost orbit. The formula of the compound between these two will be
A A3 B6B A2 B3
C A3 B2
D A2 B
E NA
Which one of the following has the regular tetrahedral structure? (Atomic numbers B = 5, S = 16, Ni = 28, Xe = 54)
A XeF4B SF4
C BF4–
D [Ni(CN)4]2–
E NA
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