IIT JEE/IIT JEE CHEMISTRY Chemical Bonding And Molecular Structure Part-1 Sample Test,Sample questions

Question:
A metallic bond is


1.electrostatic

2.covalent

3.polar

4.non polar covalent bond


Question:
A molecule which contains unpaired electron is


1.carbon monoxide

2.oxygen molecule

3.molecular nitrogen

4.carbon dioxide


Question:
Ammonia molecule is


1.triangular bipyramidal

2.octahedral

3. tetrahedral

4.pyramidal


Question:
Amongst HX, the maximum dipole moment is of




1.HBr

2.HCl

3.HF

4.HI


Question:
An ionic bond is formed when one of the atoms




1.has low ionisation energy

2.has low ionisation energy and other has high electron affinity

3.has high ionisation energy and other has low electron affinity

4.has high electron affinity


Question:
Covalent character of an ionic compound increases with

1.decrease in anion size

2.decrease in cation size

3.increase in cation size

4.decrease in both cation and anion size


Question:
Diamond is not conducting electrically because

1.there are only carbon atoms present

2.it is of crystalline nature

3.its structure is very compact

4.no free electrons are presen


Question:
Electonegativity values of elements help in predicting

1.polarity of molecules

2.covalency of the elements

3.size of the atoms

4.bond length


Question:
Ethyl alcohol and methoxy methane are isomeric but ethyl alcohol has higher boiling point because

1.alcohol has hydrogen bonding

2.alcohol is soluble in water

3.ether is more volatile

4.ether is denser than alcohol


Question:
Formation of ionic compounds is favoured by

1.low charge on cation and anion

2.low electron affinity of anion

3.high ionisation energy of cation

4.high lattice energy


Question:
From the following molecules one that contains both ionic and covalent bonds is/are

1.chlorobenzene

2.sodium chloride

3.sodium hydroxide

4.Water


Question:
Higher the bond order greater is

1.bond energy

2.bond angle

3.bond length

4.paramagnetism


Question:
Hydrogen chloride gas has

1.hydrogen bond

2.ionic bond

3.covalent bond

4.double bond


Question:
In which of the following octet rule is not applicable?




1.Alkali earth metal

2.Alkaline earth metal

3.Transition elements

4.p-block


Question:
In which of the followingmolecules carbon is not sp3 hybridized?

1.Benzaldehyde

2.Cyclohexane

3.Phenol

4.Benzyl chloride


Question:
Ionic bond formation is favoured by



1.larage cation and large anion

2.small cation and small anion

3.small cation

4. small anion


Question:
Ionic solids are characterised by

1.good conductivity in solid state

2.solubility in polar solvent

3.high vapour pressure

4.low melting point


Question:
Maximum covalency of an atom of an element is equal to the




1.no. of unpaired electrons in the p orbitals

2.total no. of electrons in the s and p orbitals

3.total no. of electrons in the p-orbitals

4.none of the above


Question:
Maximum number of bonds between two atoms of a covalent bond can be

1.four

2.five

3.three

4. zero


Question:
Metallic sodium is



1.conductor of electricity

2.insulator

3.semi-conductor

4.none of these


Question:
Nitrogen atom has atomic no. 7 while oxygen atom 8. The total number of electrons in nitrate ion is:

1.18

2.28

3.32

4.16


Question:
Out of the following the weakest interact are involved in



1.Van der Waals interaction

2.ionic bond

3.polar covalent bond

4.hydrogen bond


Question:
Oxygen-oxygen bond length in ozone is same because of

1.hyper conjugation

2.resonance

3.covalent and ionic bond

4.refraction


Question:
Resonance is not shown by



1.carbon dioxide molecule

2.silicon dioxide molecule

3.carbonate ion

4.benzene


Question:
Shape of the molecule is decided by




1.both sigma and pi bonds

2.neither sigma nor pi bonds

3.pi bonds

4.sigma bonds


Question:
Silicon dioxide has higher boiling point as compared to carbon dioxide because

1.silicon dioxide is ionic

2.silicon dioxide is octahedral

3.silicon dioxide is a covalent solid

4.silicon dioxide is more polar


Question:
Strongest bond is formed by the overlap of




1.s-s orbitals

2.ps orbitals

3.p-p orbitals

4.s and p orbitals


Question:
Tetracovalency of carbon can be explained on the basis of

1.electronegativity

2.promotion rule

3.hybridization

4.resonance


Question:
The bond angle in ammonia is

1.106 degree

2.107 degree

3.110 degree

4.99 degree


Question:
The bond angle in water is



1.104.5 degree

2.94 degree

3.103 degree

4.99 degree


Question:
The bond formation in atoms is due to the fact that they




1.get their energy lowered

2.acquire higher energy state

3.change their position

4.none of the above


Question:
The element with atomic no. 9 can exhibit an oxidation state of

1.1

2.2

3.5

4.-1


Question:
The hydrogen halide which has maximum boiling point is




1.HI

2.HBr

3.HF

4.HCl


Question:
The increase in bond order results in

1.increase in bond length and bond energy

2.decrease in bond length and bond energy both

3.decrease in bond length and increase in bond energy

4.none of the above


Question:
The nature of bonding in BF3.NH3 is

1.ionic

2.co-ordinate

3.covalent

4.metallic


Question:
The number of electrons that are shared between two atoms having a triple bond are

1.7

2.6

3.5

4.3


Question:
The number of the unpaired electrons in O-2 ion are


1.0

2.4

3.2

4. 1


Question:
Variable valency is shown by



1.N

2.Na

3.F

4. O


Question:
Water has high boiling point because it




1.is ionic

2.is covalent

3.has high dielectric constant

4.is having hydrogen bonding


Question:
Which among the following elements has tendency to form covalent compounds?

1.Aluminium

2.Strontium

3.Beryllium

4.Calcium


Question:
Which among the following is not the characteristic property of carbon?


1.Availability of d-electron for bonding

2.Highest electronegativity in the group

3.Multiple bond formation

4.Resonance


Question:
Which concept explains the fact that ortho nitro-phenol is more volatile than p-nitrophenol?

1.Hydrogen bonding

2.Hyper conjugation

3.Covalent bonding

4.Resonance


Question:
Which of the following bond is the most covalent?


1.Si-H

2.P-H

3. N-H

4.none of the above


Question:
Which of the following bond is the most polar?




1.O-O

2.C-F

3.N-F

4.Cl-Cl


Question:
Which of the following has maximum ionic character?

1.LiCl

2.CuCl

3.NaCl

4.CsCl


Question:
Which of the following is a triatomic molecule?

1.Ammonia

2.Phosphine

3.Sulphuric anhydride

4.Sulphurous anhydride


Question:
Which of the following is most volatile?

1.HF

2.HCI

3.HI

4.HBr


Question:
Which of the following is the weakest bond?


1.Metallic

2.Covalent

3.Ionic

4.H


Question:
Which out of the following has highest boiling point?


1.HCl

2.HBr

3.HF

4.HI


Question:
With the rise of temperature conductivity of metals




1.increases

2.decreases

3.may increase or decrease

4.remains constant


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