MCQS chapter -3( bonding and molecular shape
1 For
which elements does its ground state atom have no unpaired p electrons
(1) C612 (2)
O816 (3) N714 (4) Mg1224
2 In
which of the molecule would you expect
the nitrogen to nitrogen bond to be shortest (1)
N2H4 (2)N2O4 (3) N2O (4) N2
3 Energy of an atom in compound is
(1)higher than the sum of the energy of individual atoms
(2)Lesser than the sum of the individual atoms. (3)No change (4)Cannot
predict
4 which of the following is most polar?
(1) Cl − Cl (2)N−N (3) C −F (4)
O − F
5 which of the following molecular
orbital in N2 has least energy
(1) δ2s (2) π 2py (3) δ 2pz (4) π 2pz
6 The percentage ionic character of a bond having a bond
length of 1.275 A0 and 1.03 D its dipole
moment will be
(1) 8.63 % (2) 16.83% (3)
6.83 % (4) 3.68% .
7 which
of the following is diamagnetic
(1) Fe (2) Zn (3) Ni (4)
Cr
8 Which of the following is polar molecule
(1)CH4,
(2) CO2 (3)SO2 (4)CS2
9 Which solid exhibits more than one kinds of chemical
bonding
(1) Brass (2) Copper (3) Diamond (4) Ice
10 S.I unit of dipole moment is
(!)Debye (2) Poise (3) Pascal (4)
Newton
11 Product
of charge and distance is called.
(1) Bond length (2) Work (3) Dipole moment (4)none
12 Bond order for N2-molecule
(1) 3 (2)
1 (3)2 (4) 5
13 Unpaired electrons in a molecule give
----------character
(1)Ferromagnetism (2)
Diamagnetism (3)Allotropism (4)none of these
14 Molecular orbital, having higher energy than atomic
orbital is called
(1)B.M.O (2)
anti B.M.O (3) Hybrid 0rbital (4) All these.
15 Pi bond is formed by overlapping of
(1)Unhybrid orbital (2)Hybrid orbital
(3)Hybrid and un hybrid orbital (4) none of these.
16 Geometry of molecule will be pyramidal when number of
electrons in the outermost shell of central atom
(1) 3-bond-pair&one lone pair (2)2-bond pair &2-lone-pair
(3)1-bond pair &
3-lone pair (4) none of these.
17 Geometry
of simple molecule having SP3 Hybrid orbital is
(1) Triangular (2) Tetrahedral (3) Square planer (4)Pyramidal.
18 Orbital of same
energy produced after mixing
of orbital of different energy called (1)Degenerate orbital
(2)Generate orbital
(3)Hybrid orbital
(4)all these
19 The geometry of ammonia
is
(1)tetrahedral (2)Angular
(3)Pyramidal (4)triangular.
20 Which of the following molecule has unpaired electron in anti
B.M.O.?
(1)O2 (2)N2 (3)Br2 (4)F2
21 Which of the following
is least polar
(1)H2O (2)H2S (3)H2Se (4)H2Te
22 In which of the
following theories , the hybridization
is considered,
(1)VSEPR (2)Lewis (3)M.O.T (4)V.B.T
23 The bond order for He2
+ is
(1)2 (2)1.5 (3)zero (4)0.5
24 The degree of polarity
of molecule is expressed by
(1)Bond strength (2)Dipole moment (3)Bond length
(4)shape of the
molecule.
25 The VSEPR theory
explain ----------of the
molecule
(1)Number (2)Kinds (3) geometry (4)none of
these
26 If two lone pairs are
present, then bond angle of
tetrahedral compound reduce
to ----- degree (1)109.5 (2)107.5 (3)104.5 (4)all
thes.
27 The internuclear distance at which force of attraction is
created between atoms is called
(1) Equilibrium bond distances (2)Bond length (3) Both 1&2 (4)none
of these
28 PH3 has---------shape .
(1)Trigonal (2)Pyramidal (3)Tetrahedral (4)Linear
29 which of the following is more ionic?
(1) NaCl (2)
KCl (3) MgCl2 (4) CaCl2
30 The bond formed by the parallel overlapping of P –orbital
(1)Sigma (2)Pi
(3)Ionic (4)all
31 In SP2 hybridization the bond angle is
(1)1200 (2)1800
(3)109.50 (4)104.50
32 In carboxylic acid the
bond angle between O ¾ C ¾ O is
(1)1090 (2)1800 (3)
900 (4)1200
33 The shape of BCl3
molecule is
(1)tetrahedral (2)Triagonal planer (3) pyramidal (4)all
34 Which of the
molecule is not planer
(1)C6H6 (2)C2H4
(3)
BF3 (4) PCl3
35 CO2 has
zero dipole moment due to
(1) size of molecule (2)shape of
molecule
(3) electro negativity difference of C & O (4)none
of these
36 In which compound C-atom is SP-hybridized
(1)C2H6 (2)CH4
(3)H2O (4)none
of these
37 Which is the weakest bond
(1)Covalent (2)Ionic (3)Co-ordinate
covalent (4)H-bonding.
38 Diamond & Graphite have he same
(1)bond angle (2)Hybridization (3)physical properties (4) chemical properties
39 How many hybrid orbitals are formed in SP2 hybridization
(1)
4 (2)
3 (3)2 (4)5
40 Which of the following molecule would be polar
(1) COS (2)CO2 (3)CS2 (4)
O2
41 Consider the molecule CH2O. What is the
hybridization in C
.(1)SP (2)SP2
(3)SP3 (4)dSP3
42 The type of bonds present in
CuSO4.5H2O
are
(1) Ionic
&covalent
(2)Ionic ,covalent &co-ordinate
(3)Ionic
&co- ordinate (4)
none of these
43 The
compound which contain both ionic and covalent bonds
(1)CH4 (2)KCN (3)KCl (4)KBr
44 Which of the following structure is associated with SP2 Hybridization
(1)Rectangle (2)Triagonal (3)Tetrahedral (4)Square planer.
45 The bond formed between two He – atoms (1)Sigma (2)Pi (3) no
bond (4)both
1&2
46 The bond formed by the overlapping of
P-orbital in two F-atoms
(1) Sigma (2) Pi (3) Sigma star (4) Pi star
47 In SP hybridized orbital, the S character is
(1)25%
(2)50%
(3)75% (3)100%
.48 In which of the following compounds C is SP
hybridized.
(1)C2H6 (2) C3H6
(3)C4H6 (4)C5H10
49
Which of the following compound will have minimum bond angle between
H?
(1)CH4 (2)NH3 (3) H2O (4)SiH4
50 Which
of the following structure will have smallest dipole
moment
(1) H2 Se (2)H2S (3) H2O (4) H2Te
51 Oxygen atom in water show--------- Hybridization
(1)
SP3 (2) SP2 (3)SP (4)none of
these
52 VSEPR & VBT fail to show un pair electrons in
(1)O2
(2)N2
(3)F2 (4) Cl2
53 How
many lone pair of electrons are there in
HNH ¾ CO ¾HNH (the lewis structure of Urea)
(1) 5
(2)
2 (3) 7 (4)4
54 How
many valence electron are there in sulphuric acid
(1)32 (2)28 (3)20 (4)12
55 In
which molecule the central atom is sp2 hybridized
(1) H2O (2)
HCN (3) BF3 (4)CH4
56 which of the following ion would
least likely to form
(1) F-2 (2) Be+2 (3) Fe+2 (3)B+3.
57 The sum of the total number of electrons
pairs (bonding and lone pair) is called
1;
Atomic number 2; Bond number 3; steric number 4; oxidation number.
58 Which of the
following process involve
breaking of covalent bond
(1)melting
of H2O (2)Melting
of SiO2
(3)Melting
of NaCl (4)Boiling of SiCl4.
59 The angle between covalent bond is maximum in
(1)H2S (2)BF3 (3)PH3
(4)CH4
60 Amongst the following molecule, the one with largest
distance between two adjacent
C-atoms
(1)Ethane (2)Ethene (3)Ethyne (4) Benzene
61 Which of the following is least likely to show ionic bonding
(1)KF (2)BaCl2 (3)ZnCl2 (4)S2Cl2
62 An atom with a high E.N,generally has
(1)Low
E.A (2)Small At.no (3)High
I.P (4)large
At.size
63 which of the following molecule contain one triple bond
(1)NH3
(2)HCN (3)SO3 (4)C2H4
64 An element X whose atom have the E.C , 1S2,2S2,2P6,3S2 would be expected to form chloride
(1)
X2Cl (2)XCl
(3)XCl2 (4)XCl3
65 which one of the following has linear molecule
(1) H2O
(2) HCN (3) SO2 (4) C2H4
66 According toV.B.T
(1)All
the valence electrons can form covalent bond
(2)Electron
of half filled orbital can form covalent bond
(3)Only
filled orbital can form C.B (4) All
these are true
67 The shared pair of electrons in M.O are
(1)with the same spin (2)With
opposite spin (3)With no
spin (4)None of these
68 The density of electrons
in pi bond is
(1)on bond
axis (2)
above &below the bond axis
(3)In
between the nuclei (4)none of
these
69 Only those orbital can mixed
up in hybridization
(1)Which belong to the same orbit (2)The energy difference of
which is low
(3)Belong
to the same sub shell (4)none
of these
70 Which electrons occupy more space
.(1)Bond
pair (2)unpaired
(3)Lone
pair (4)All These
71 The expected geometry of water molecule according to VSEPR
theory is
(1)Triangular (2) Angular (3) Tetrahedral (4)square planer
72 which
of the following is diamagnetic
(1) O2+ (2)
O2 (3)
O2- (4)
O2-2
73 Which one is a Lewis acid?
(1) HCl (2)
AlCl3 (3) H2SO4 (4) HNO3
74 The nature of bond between oxygen and H+ ion in
hydroxoniui (H3O+)
ion is
(1) Ionic bond (2)
Covalent bond (3) Co-ordiinate Covalent bond
(4) H-bond
75 The bond energy of resonance hybrid is
1; greater than
resonance structure 2; lesser than
resonance structures
3; equal to resonance structures 4; cannot be predicted.
76 which one is not possible between wo atoms,
1; two pi bonds 2; one sigma and one pi bond
3; two sigma bonds 4; all are possible
77 which one of the following always form covalent bond,
1;
Ba 2; Ca 3:Mg 4: Be
78 Bond order for O2 ,O2-2 and
O2+2 is
respectively
1; 2, 3, 1 2;
1 ,2, ,3 3; 2, 1, 3 4; 2, 2, 2
79 How many sigma bonds are there un one mole of ethene.
1; 3 2;
5 3; 7 4; 4
80 which one of the following is non directional
1; covalent bond 2;
co ordinate covalent bond 3: ionic bond 4; allthese.
Key
1; 4 2. 4 3;
2 4; 3 5; 1 6; 2 7; 2 8;
3 9; 4 10; 1
11; 3 12; 1 13;
1 14; 2 15;
1 16; 1 17;
2 18; 3 19;
3 20; 1
21; 4 22; 4 23;
4 24; 2 25;
3 26; 3 27;
3 28; 2 29.
2 30; 2
31; 1 32; 4 33.
2 34; 4 35;
2 36; 4 37;
4 38; 4 39;
2 40; 1
41; 2 42; 2 43;
2 44; 2 45;
3 46; 1 47;
2 48; 3 49;
3 50 ; 4
51; 1 52; 1 53;
4 54; 1 55;
3 56; 1 57;
3 58; 2 59;
2 60; 1
61; 4 62; 3 63;
2 64; 3 65;
2 66; 2 67;
2 68; 2 69;
2 70; 3
71; 3 72; 4 73;
2 74; 3 75:
2 76:1 77;
4 78; 3 79:
2 80; 3
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