Chemical Bonds Test 5

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:In the following which substance will have highest boiling point

Answers Choices:

\(He\)

\(CsF\)

\(N{H_3}\)

\(CHC{l_3}\)

Questions 2 of 50

Question:Phosphate of a metal M has the formula \({M_3}{\left( {P{O_4}} \right)_2}.\) The formula for its sulphate would be

Answers Choices:

\(MS{O_4}\)

\(M{\left( {S{O_4}} \right)_2}\)

\({M_2}{\left( {S{O_4}} \right)_3}\)

\({M_3}{\left( {S{O_4}} \right)_2}\)

Questions 3 of 50

Question:Chemical formula for calcium pyrophosphate is \({120^o}\) The formula for ferric pyrophosphate will be

Answers Choices:

\(F{e_3}{({P_2}{O_7})_3}\)

\(F{e_4}{P_4}{O_{14}}\)

\(F{e_4}{({P_2}{O_7})_3}\)

\(F{e_3}P{O_4}\)

Questions 4 of 50

Question:An atom with atomic number 20 is most likely to combine chemically with the atom whose atomic number is

Answers Choices:

11

14

16

10

Questions 5 of 50

Question:In covalency

Answers Choices:

Electrons are transferred

Electrons are equally shared

The electron of one atom are shared between two atoms

None of the above

Questions 6 of 50

Question:Octet rule is not valid for the molecule

Answers Choices:

\(C{O_2}\)

\({H_2}O\)

\(CO\)

\({O_2}\)

Questions 7 of 50

Question:The interatomic distances in \({H_2}\) and \(C{l_2}\) molecules are 74 and 198 pm respectively. The bond length of \(HCl\) is

Answers Choices:

272 pm

136 pm

124 pm

248 pm

Questions 8 of 50

Question:Which of the following atoms has minimum covalent radius

Answers Choices:

B

C

N

Si

Questions 9 of 50

Question:Number of electrons in the valence orbit of nitrogen in an ammonia molecule are

Answers Choices:

8

5

6

7

Questions 10 of 50

Question:Which has a coordinate bond

Answers Choices:

\(SO_3^{2 - }\)

\(C{H_4}\)

\(C{O_2}\)

\(N{H_3}\)

Questions 11 of 50

Question:Which of the following would have a permanent dipole moment

Answers Choices:

\(B{F_3}\)

\(Si{F_4}\)

\(S{F_4}\)

\(Xe{F_4}\)

Questions 12 of 50

Question:Carbon tetrachloride has no net dipole moment because of

Answers Choices:

Its planar structure

Its regular tetrahedral structure

Similar sizes of carbon and chlorine atoms

Similar electron affinities of carbon and chlorine

Questions 13 of 50

Question:Which shows the least dipole moment

Answers Choices:

\(CC{l_4}\)

\(CHC{l_3}\)

\(C{H_3}C{H_2}OH\)

\(C{H_3}COC{H_3}\)

Questions 14 of 50

Question:Which molecule has zero dipole moment

Answers Choices:

\({H_2}O\)

AgI

\(PbS{O_4}\)

HBr

Questions 15 of 50

Question:Polarization is the distortion of the shape of an anion by an adjacently placed cation. Which of the following statements is correct

Answers Choices:

Maximum polarization is brought about by a cation of high charge

Minimum polarization is brought about by a cation of low radius

A large cation is likely to bring about a large degree of polarization

A small anion is likely to undergo a large degree of polarization

Questions 16 of 50

Question:The bonds between \(P\) atoms and \(Cl\) atoms in \(PC{l_5}\) are likely to be

Answers Choices:

Ionic with no covalent character

Covalent with some ionic character

Covalent with no ionic character

Ionic with some metallic character

Questions 17 of 50

Question:Which of the following has zero dipole moment

Answers Choices:

ClF

\(PC{l_3}\)

\(Si{F_4}\)

\(CFC{l_3}\)

Questions 18 of 50

Question:Which of the following compounds has least dipole moment

Answers Choices:

\(P{H_3}\)

\(CHC{l_3}\)

\(N{H_3}\)

\(B{F_3}\)

Questions 19 of 50

Question:The most acidic compound among the following is

Answers Choices:

\(C{H_3}C{H_2}OH\)

\({C_6}{H_5}OH\)

\(C{H_3}COOH\)

\(C{H_3}C{H_2}C{H_2}OH\)

Questions 20 of 50

Question:Which of the following is not correct

Answers Choices:

A sigma bond is weaker than \(\pi \)bond

A sigma bond is stronger than \(\pi \)bond

A double bond is stronger than a single bond

A double bond is shorter than a single bond

Questions 21 of 50

Question:The bond angle in ethylene is

Answers Choices:

\({180^o}\)

\({120^o}\)

\({109^o}\)

\({90^o}\)

Questions 22 of 50

Question:Compound formed by \(s{p^3}d\)hybridization will have structure

Answers Choices:

Planar

Pyramidal

Angular

Trigonal bipyramidal

Questions 23 of 50

Question:Which of the following is the correct electronic formula of chlorine molecule

Answers Choices:

\(:\,\mathop {Cl}\limits_{.\,.}^{\,\,\,.\,.} \,:\,\mathop {Cl}\limits_{.\,.}^{\,\,\,.\,.} \,:\)

\(:\,\mathop {C{l^ - }}\limits_{.\,.}^{\,\,\,.\,.} \,:\,\,:\,\,\mathop {C{l^ + }}\limits_{.\,.}^{\,.\,.} \,:\)

\(:\,\mathop {Cl}\limits_{}^{\,\,\,.\,.} \,:\,\mathop {Cl}\limits_{}^{\,\,\,.\,.} \,:\)

\(:\,\mathop {Cl}\limits_{}^{\,\,\,.\,.} \,:\,\mathop {\,:\,Cl}\limits_{}^{\,\,\,.\,.} \,:\)

Questions 24 of 50

Question:In \(Xe{F_4}\) hybridization is

Answers Choices:

\(s{p^3}{d^2}\)

\(s{p^3}\)

\(s{p^3}d\)

\(s{p^2}d\)

Questions 25 of 50

Question:The structural formula of a compound is \(C{H_3} - CH = C = C{H_2}.\) The type of hybridization at the four carbons from left to right are

Answers Choices:

\(s{p^2},\,\,sp,\,\,s{p^2},\,\,s{p^3}\)

\(s{p^2},\,\,s{p^3},\,\,s{p^2},\,\,sp\)

\(s{p^3},\,\,s{p^2},\,\,sp,\,\,s{p^2}\)

\(s{p^3},\,\,s{p^2},\,\,s{p^2},\,\,s{p^2}\)

Questions 26 of 50

Question:Acetate ion contains

Answers Choices:

One \(C,\,\,O\)single bond and one \(C,\,\,O\) double bond

Two \(C,\,\,O\) single bonds

Two \(C,\,\,O\)double bonds

None of the above

Questions 27 of 50

Question:In the compound \(C{H_3} \to OCl\) which type of orbitals have been used by the circled carbon in bond formation

Answers Choices:

\(s{p^3}\)

\(s{p^2}\)

\(sp\)

p

Questions 28 of 50

Question:The correct order of the \(O - O\) bond length in \({O_2},\,\,{H_2}{O_2}\) and \({O_3}\) is

Answers Choices:

\({O_2} > {O_3} > {H_2}{O_2}\)

\({O_3} > {H_2}{O_2} > {O_2}\)

\({H_2}{O_2} > {O_3} > {O_2}\)

\({O_2} > {H_2}{O_2} > {O_3}\)

Questions 29 of 50

Question:Which of the following is isoelectronic as well as has same structure as that of \({N_2}O\)

Answers Choices:

\({N_3}H\)

\({H_2}O\)

\(N{O_2}\)

\(C{O_2}\)

Questions 30 of 50

Question:\(CC{l_4}\) has the hybridization

Answers Choices:

\(s{p^3}d\)

\(ds{p^2}\)

\(sp\)

\(s{p^3}\)

Questions 31 of 50

Question:Pyramidal shape would be of

Answers Choices:

\(NO_3^ - \)

\({H_2}O\)

\({H_3}{O^ + }\)

\(NH_4^ + \)

Questions 32 of 50

Question:What is the correct mode of hybridization of the central atom in the following compounds : \(NO_2^ + ,S{F_{4,}}P{F_6}^ - \)

Answers Choices:

\(s{p^2},\,\,s{p^3},\,\,{d^2}s{p^3}\)

\(s{p^3},\,\,s{p^3}{d^2},\,\,s{p^3}{d^2}\)

\(sp,\,\,s{p^3}d,\,\,s{p^3}{d^2}\)

\(sp,\,\,s{p^2},\,\,s{p^3}\)

Questions 33 of 50

Question:As the s-character of hybridisation orbital increases, the bond angle

Answers Choices:

Increases

Decreases

Becomes zero

Does not change

Questions 34 of 50

Question:The shape of \(I{F_7}\)molecule is

Answers Choices:

Octahedral

Pentagonal bipyramidal

Trigonal bipyramidal

Tetrahedral

Questions 35 of 50

Question:Among the following compounds the one that is polar and has central atom with \(s{p^2} - \)hybridization is

Answers Choices:

\({H_2}C{O_3}\)

\(B{F_3}\)

\(Si{F_4}\)

\(HCl{O_2}\)

Questions 36 of 50

Question:Which of the following molecules has pyramidal shape

Answers Choices:

\(PC{l_3}\)

\(S{O_3}\)

\(CO_3^{2 - }\)

\(NO_3^ - \)

Questions 37 of 50

Question:Resonance is due to

Answers Choices:

Delocalization of sigma electrons

Delocalization of pi electrons

Migration of H atoms

Migration of protons

Questions 38 of 50

Question:\(Xe{F_6}\) is

Answers Choices:

Octahedral

Distorted octahedral

Planar

Tetrahedral

Questions 39 of 50

Question:Which of the following species is planar

Answers Choices:

\(CO_3^{2 - }\)

\(N{H_2}\)

\(PC{l_3}\)

None of these

Questions 40 of 50

Question:The bond angle in ammonia molecule is

Answers Choices:

\({91^o}8'\)

\({93^o}3'\)

\({106^o}45'\)

\({109^o}28'\)

Questions 41 of 50

Question:Out of the following which has smallest bond length

Answers Choices:

\({O_2}\)

\(O_2^ + \)

\(O_2^ - \)

\(O_2^{2 - }\)

Questions 42 of 50

Question:The energy of a \(2p\)orbital except hydrogen atom is

Answers Choices:

Less than that of \(s{p^2}\) orbital

More than that of \(2s\)orbital

Equal to that of \(2s\) orbital

Double that of \(2s\) orbital

Questions 43 of 50

Question:Which bond is strongest

Answers Choices:

\(F - F\)

\(Br - F\)

\(Cl - F\)

\(I - F\)

Questions 44 of 50

Question:Which of the following is paramagnetic

Answers Choices:

\(O_2^ + \)

\(C{N^ - }\)

CO

\({N_2}\)

Questions 45 of 50

Question:The paramagnetic molecule at ground state among the following is

Answers Choices:

\({H_2}\)

\({O_2}\)

\({N_2}\)

\(CO\)

Questions 46 of 50

Question:The reason for exceptionally high boiling point of water is

Answers Choices:

Its high specific heat

Its high dielectric constant

Low ionization of water molecules

Hydrogen bonding in the molecules of water

Questions 47 of 50

Question:Hydrogen bonding is maximum in

Answers Choices:

Ethanol

Diethyl ether

Ethyl chloride

Triethyl amine

Questions 48 of 50

Question:\(N{H_3}\) has a much higher boiling point than \(P{H_3}\) because

Answers Choices:

\(N{H_3}\) has a larger molecular weight

\(N{H_3}\) undergoes umbrella inversion

\(N{H_3}\) forms hydrogen bond

\(N{H_3}\) contains ionic bonds whereas \(P{H_3}\) contains covalent bonds

Questions 49 of 50

Question:Which one of the following substances consists of small discrete molecules

Answers Choices:

\(CO\)

Graphite

Copper

Dry ice

Questions 50 of 50

Question:Blue vitriol has

Answers Choices:

Ionic bond

Coordinate bond

Hydrogen bond

All the above