A metallic bond is
1.electrostatic
2.covalent
3.polar
4.non polar covalent bond
Posted Date:-2021-09-27 13:26:18
A molecule which contains unpaired electron is
1.carbon monoxide
2.oxygen molecule
3.molecular nitrogen
4.carbon dioxide
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Ammonia molecule is
1.triangular bipyramidal
2.octahedral
3. tetrahedral
4.pyramidal
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Amongst HX, the maximum dipole moment is of
1.HBr
2.HCl
3.HF
4.HI
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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
Posted Date:-2021-09-27 13:26:18
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
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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
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Electonegativity values of elements help in predicting
1.polarity of molecules
2.covalency of the elements
3.size of the atoms
4.bond length
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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
Posted Date:-2021-09-27 13:26:18
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
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From the following molecules one that contains both ionic and covalent bonds is/are
1.chlorobenzene
2.sodium chloride
3.sodium hydroxide
4.Water
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Higher the bond order greater is
1.bond energy
2.bond angle
3.bond length
4.paramagnetism
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Hydrogen chloride gas has
1.hydrogen bond
2.ionic bond
3.covalent bond
4.double bond
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In which of the following octet rule is not applicable?
1.Alkali earth metal
2.Alkaline earth metal
3.Transition elements
4.p-block
Posted Date:-2021-09-27 13:26:18
In which of the followingmolecules carbon is not sp3 hybridized?
1.Benzaldehyde
2.Cyclohexane
3.Phenol
4.Benzyl chloride
Posted Date:-2021-09-27 13:26:18
Ionic bond formation is favoured by
1.larage cation and large anion
2.small cation and small anion
3.small cation
4. small anion
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Ionic solids are characterised by
1.good conductivity in solid state
2.solubility in polar solvent
3.high vapour pressure
4.low melting point
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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
Posted Date:-2021-09-27 13:26:18
Maximum number of bonds between two atoms of a covalent bond can be
1.four
2.five
3.three
4. zero
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Metallic sodium is
1.conductor of electricity
2.insulator
3.semi-conductor
4.none of these
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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
Posted Date:-2021-09-27 13:26:18
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
Posted Date:-2021-09-27 13:26:18
Oxygen-oxygen bond length in ozone is same because of
1.hyper conjugation
2.resonance
3.covalent and ionic bond
4.refraction
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Resonance is not shown by
1.carbon dioxide molecule
2.silicon dioxide molecule
3.carbonate ion
4.benzene
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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
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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
Posted Date:-2021-09-27 13:26:18
Strongest bond is formed by the overlap of
1.s-s orbitals
2.ps orbitals
3.p-p orbitals
4.s and p orbitals
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Tetracovalency of carbon can be explained on the basis of
1.electronegativity
2.promotion rule
3.hybridization
4.resonance
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The bond angle in ammonia is
1.106 degree
2.107 degree
3.110 degree
4.99 degree
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The bond angle in water is
1.104.5 degree
2.94 degree
3.103 degree
4.99 degree
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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
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The element with atomic no. 9 can exhibit an oxidation state of
1.1
2.2
3.5
4.-1
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The hydrogen halide which has maximum boiling point is
1.HI
2.HBr
3.HF
4.HCl
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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
Posted Date:-2021-09-27 13:26:18
The nature of bonding in BF3.NH3 is
1.ionic
2.co-ordinate
3.covalent
4.metallic
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The number of electrons that are shared between two atoms having a triple bond are
1.7
2.6
3.5
4.3
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The number of the unpaired electrons in O-2 ion are
1.0
2.4
3.2
4. 1
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Variable valency is shown by
1.N
2.Na
3.F
4. O
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Water has high boiling point because it
1.is ionic
2.is covalent
3.has high dielectric constant
4.is having hydrogen bonding
Posted Date:-2021-09-27 13:26:18
Which among the following elements has tendency to form covalent compounds?
1.Aluminium
2.Strontium
3.Beryllium
4.Calcium
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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
Posted Date:-2021-09-27 13:26:18
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
Posted Date:-2021-09-27 13:26:18
Which of the following bond is the most covalent?
1.Si-H
2.P-H
3. N-H
4.none of the above
Posted Date:-2021-09-27 13:26:18
Which of the following bond is the most polar?
1.O-O
2.C-F
3.N-F
4.Cl-Cl
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Which of the following has maximum ionic character?
1.LiCl
2.CuCl
3.NaCl
4.CsCl
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Which of the following is a triatomic molecule?
1.Ammonia
2.Phosphine
3.Sulphuric anhydride
4.Sulphurous anhydride
Posted Date:-2021-09-27 13:26:18
Which of the following is most volatile?
1.HF
2.HCI
3.HI
4.HBr
Posted Date:-2021-09-27 13:26:18
Which of the following is the weakest bond?
1.Metallic
2.Covalent
3.Ionic
4.H
Posted Date:-2021-09-27 13:26:18
Which out of the following has highest boiling point?
1.HCl
2.HBr
3.HF
4.HI
Posted Date:-2021-09-27 13:26:18
With the rise of temperature conductivity of metals
1.increases
2.decreases
3.may increase or decrease
4.remains constant
Posted Date:-2021-09-27 13:26:18