# 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

$$He$$

$$CsF$$

$$N{H_3}$$

$$CHC{l_3}$$

## 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

$$MS{O_4}$$

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

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

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

## Questions 3 of 50

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

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

$$F{e_4}{P_4}{O_{14}}$$

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

$$F{e_3}P{O_4}$$

## Questions 4 of 50

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

11

14

16

10

## Questions 5 of 50

Question:In covalency

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

$$C{O_2}$$

$${H_2}O$$

$$CO$$

$${O_2}$$

## 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

272 pm

136 pm

124 pm

248 pm

## Questions 8 of 50

Question:Which of the following atoms has minimum covalent radius

B

C

N

Si

## Questions 9 of 50

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

8

5

6

7

## Questions 10 of 50

Question:Which has a coordinate bond

$$SO_3^{2 - }$$

$$C{H_4}$$

$$C{O_2}$$

$$N{H_3}$$

## Questions 11 of 50

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

$$B{F_3}$$

$$Si{F_4}$$

$$S{F_4}$$

$$Xe{F_4}$$

## Questions 12 of 50

Question:Carbon tetrachloride has no net dipole moment because of

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

$$CC{l_4}$$

$$CHC{l_3}$$

$$C{H_3}C{H_2}OH$$

$$C{H_3}COC{H_3}$$

## Questions 14 of 50

Question:Which molecule has zero dipole moment

$${H_2}O$$

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

Maximum polarization is brought about by a cation of high charge

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

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

ClF

$$PC{l_3}$$

$$Si{F_4}$$

$$CFC{l_3}$$

## Questions 18 of 50

Question:Which of the following compounds has least dipole moment

$$P{H_3}$$

$$CHC{l_3}$$

$$N{H_3}$$

$$B{F_3}$$

## Questions 19 of 50

Question:The most acidic compound among the following is

$$C{H_3}C{H_2}OH$$

$${C_6}{H_5}OH$$

$$C{H_3}COOH$$

$$C{H_3}C{H_2}C{H_2}OH$$

## Questions 20 of 50

Question:Which of the following is not correct

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

$${180^o}$$

$${120^o}$$

$${109^o}$$

$${90^o}$$

## Questions 22 of 50

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

Planar

Pyramidal

Angular

Trigonal bipyramidal

## Questions 23 of 50

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

$$:\,\mathop {Cl}\limits_{.\,.}^{\,\,\,.\,.} \,:\,\mathop {Cl}\limits_{.\,.}^{\,\,\,.\,.} \,:$$

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

$$:\,\mathop {Cl}\limits_{}^{\,\,\,.\,.} \,:\,\mathop {Cl}\limits_{}^{\,\,\,.\,.} \,:$$

$$:\,\mathop {Cl}\limits_{}^{\,\,\,.\,.} \,:\,\mathop {\,:\,Cl}\limits_{}^{\,\,\,.\,.} \,:$$

## Questions 24 of 50

Question:In $$Xe{F_4}$$ hybridization is

$$s{p^3}{d^2}$$

$$s{p^3}$$

$$s{p^3}d$$

$$s{p^2}d$$

## 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

$$s{p^2},\,\,sp,\,\,s{p^2},\,\,s{p^3}$$

$$s{p^2},\,\,s{p^3},\,\,s{p^2},\,\,sp$$

$$s{p^3},\,\,s{p^2},\,\,sp,\,\,s{p^2}$$

$$s{p^3},\,\,s{p^2},\,\,s{p^2},\,\,s{p^2}$$

## Questions 26 of 50

Question:Acetate ion contains

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

$$s{p^3}$$

$$s{p^2}$$

$$sp$$

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

$${O_2} > {O_3} > {H_2}{O_2}$$

$${O_3} > {H_2}{O_2} > {O_2}$$

$${H_2}{O_2} > {O_3} > {O_2}$$

$${O_2} > {H_2}{O_2} > {O_3}$$

## Questions 29 of 50

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

$${N_3}H$$

$${H_2}O$$

$$N{O_2}$$

$$C{O_2}$$

## Questions 30 of 50

Question:$$CC{l_4}$$ has the hybridization

$$s{p^3}d$$

$$ds{p^2}$$

$$sp$$

$$s{p^3}$$

## Questions 31 of 50

Question:Pyramidal shape would be of

$$NO_3^ -$$

$${H_2}O$$

$${H_3}{O^ + }$$

$$NH_4^ +$$

## Questions 32 of 50

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

$$s{p^2},\,\,s{p^3},\,\,{d^2}s{p^3}$$

$$s{p^3},\,\,s{p^3}{d^2},\,\,s{p^3}{d^2}$$

$$sp,\,\,s{p^3}d,\,\,s{p^3}{d^2}$$

$$sp,\,\,s{p^2},\,\,s{p^3}$$

## Questions 33 of 50

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

Increases

Decreases

Becomes zero

Does not change

## Questions 34 of 50

Question:The shape of $$I{F_7}$$molecule is

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

$${H_2}C{O_3}$$

$$B{F_3}$$

$$Si{F_4}$$

$$HCl{O_2}$$

## Questions 36 of 50

Question:Which of the following molecules has pyramidal shape

$$PC{l_3}$$

$$S{O_3}$$

$$CO_3^{2 - }$$

$$NO_3^ -$$

## Questions 37 of 50

Question:Resonance is due to

Delocalization of sigma electrons

Delocalization of pi electrons

Migration of H atoms

Migration of protons

## Questions 38 of 50

Question:$$Xe{F_6}$$ is

Octahedral

Distorted octahedral

Planar

Tetrahedral

## Questions 39 of 50

Question:Which of the following species is planar

$$CO_3^{2 - }$$

$$N{H_2}$$

$$PC{l_3}$$

None of these

## Questions 40 of 50

Question:The bond angle in ammonia molecule is

$${91^o}8'$$

$${93^o}3'$$

$${106^o}45'$$

$${109^o}28'$$

## Questions 41 of 50

Question:Out of the following which has smallest bond length

$${O_2}$$

$$O_2^ +$$

$$O_2^ -$$

$$O_2^{2 - }$$

## Questions 42 of 50

Question:The energy of a $$2p$$orbital except hydrogen atom is

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

$$F - F$$

$$Br - F$$

$$Cl - F$$

$$I - F$$

## Questions 44 of 50

Question:Which of the following is paramagnetic

$$O_2^ +$$

$$C{N^ - }$$

CO

$${N_2}$$

## Questions 45 of 50

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

$${H_2}$$

$${O_2}$$

$${N_2}$$

$$CO$$

## Questions 46 of 50

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

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

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

$$N{H_3}$$ 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

$$CO$$

Graphite

Copper

Dry ice

## Questions 50 of 50

Question:Blue vitriol has