A factor that does not favour the formation of cation from the atom M is
1.high charge on resulting cation
2.large size of the atomic radius
3.low ionisation energy
4.low charge on anion
Posted Date:-2021-09-29 04:45:17
According to Fajan rules the covalent character is most favored in
1.Small cation large anion
2.Small cation small anion
3.Large cation large anion
4.Large cation small anion.
Posted Date:-2021-09-29 04:45:17
Bond order is given by
1.3(na-nb)
2.3(nb+na)
3.2(nb-na)
4.(nb-na)/2
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C-H bond distance is smallest in
1.methane
2.ethene
3.ethyne
4.ethane.
Posted Date:-2021-09-29 04:45:17
Covalent molecules are generally held in the crystal structures by
1.Van der Waals forces
2.electrostatic forces
3.covalent bonds
4.dipolar forces
Posted Date:-2021-09-29 04:45:17
During bond formation normally all the elements in their outermost shell acquire
1.three electrons
2.ten electrons
3.eight electrons
4.sixteen electrons
Posted Date:-2021-09-29 04:45:17
Formic acid exists as dimer because
1.hydrogen bonds hold the molecules together
2.two molecules exists as a resonance
3.two molecules exist as a single unit
4.None of the above
Posted Date:-2021-09-29 04:45:17
Fused ionic compounds
1.are used as semi-conductors
2.conduct electricity
3.are insulators
4.none of the above
Posted Date:-2021-09-29 04:45:17
he half of the difference between the number of electrons in bonding and antibonding MOs is called
1.molecular order
2.bond order
3.electronic order
4.bonding capacity.
Posted Date:-2021-09-29 04:45:17
Hydrogen bond is formed in compounds containing hydrogen and
1.negatively charged species
2.positively charged species
3.highly electronegative atom
4.highly electropositive atom
Posted Date:-2021-09-29 04:45:17
Ice and water differ from each other in
1.elemental composition
2.molecular formulae
3.extent of H-bonding
4.nature of interparticle forces.
Posted Date:-2021-09-29 04:45:17
In a homonuclear molecule higher the bond order larger will be
1.bond length
2.bond strength
3.paramagnetism
4.ionic character.
Posted Date:-2021-09-29 04:45:17
In diamond the bonds present are
1.ionic covalent
2.covalent dative
3.electrovalent dative
4.covalent only.
Posted Date:-2021-09-29 04:45:17
In the co-ordinate bond the acceptor atom must essentially contain in its valence shell an orbital with
1.no electron
2.single electron
3.two unpaired electrons
4.None of these
Posted Date:-2021-09-29 04:45:17
KCl readily dissolves in water because
1.it is a salt of potassium
2.it is ionic compound
3.it reacts with water
4.it has appreciable covalent character.
Posted Date:-2021-09-29 04:45:17
Linear combination of two hybridized orbital belonging to two different atoms results in the formation of
1.sigma bond
2.pi bond
3.delta bond
4.double bond.
Posted Date:-2021-09-29 04:45:17
Molecular orbital theory was developed by
1.Rutherford
2.Millikan
3.Planck
4.Bohr
Posted Date:-2021-09-29 04:45:17
Nitrogen atom has 7 protons 7 electrons and 7 neutrons. The nitride ion has
1.7 protons 7 neutrons 9 electrons
2.8 protons 6 neutrons 4 electrons
3.5 protons 6 neutrons 7 electrons
4.7 protons 7 neutrons 10 electrons
Posted Date:-2021-09-29 04:45:17
Paramagnetism is exhibited by molecules whichc
1.are not attracted by magnetic field
2.contain only paired electrons
3.contain unpaired electrons
4.arry positive charge.
Posted Date:-2021-09-29 04:45:17
Sulphuric acid molecule contains
1.covalent and ionic bonds
2.only ionic bonds
3.only covalent bonds
4.covalent and co-ordinate bonds
Posted Date:-2021-09-29 04:45:17
Tetrahedral bonding of carbon atoms was first shown by
1.Vant Hoff and Le Bel
2.Planck
3.Lewis
4.Buffer
Posted Date:-2021-09-29 04:45:17
The aqueous solution of which of the following substances will be able to conduct electricity?
1.Glycerol
2.Sucrose
3.HI
4.Ethanol.
Posted Date:-2021-09-29 04:45:17
The atomic number of element which shows oxidation state of +3 is
1.13
2.16
3.23
4.18
Posted Date:-2021-09-29 04:45:17
The bond order of NO molecules is
1.1.5
2.2
3.2.5
4.3
Posted Date:-2021-09-29 04:45:17
The carbon-carbon link in acetylene contains
1.One sigma and two pi bonds
2.Two sigma and three pi bonds
3.Two sigma and two pi bonds
4.Three sigma bonds.
Posted Date:-2021-09-29 04:45:17
The molecule of ICI is
1.polar with negative end at iodine
2.polar with negative end at chlorine
3.purely electrovalent
4.purely covalent
Posted Date:-2021-09-29 04:45:17
The most covalent halide of aluminium is
1.aluminium chloride
2.aluminium iodide
3.aluminium fluoride
4.aluminium bromide
Posted Date:-2021-09-29 04:45:17
The number of electrons being shared in nitrogen molecule is
1.4
2.2
3.8
4.6
Posted Date:-2021-09-29 04:45:17
The partial ionic character of HCl is due to difference in
1.ionisation potential
2.electronegativity
3.electron affinity
4.None of these
Posted Date:-2021-09-29 04:45:17
The shortest carbon carbon bond distance is found in
1.acetylene
2.propane
3.ethane
4.diamond
Posted Date:-2021-09-29 04:45:17
VSEPR Theory was proposed by
1.Lewis
2.Lewis and Kossel
3.Nyhom and Gillipsie
4.Linus Pauling.
Posted Date:-2021-09-29 04:45:17
What is not true about hybridization?
1.Hybrid orbitals form relatively stronger bonds than pure atomic orbitals
2.Hybrid orbitals form sigma bonds
3.Orientation of hybrid orbitals depends upon the type of hybridization
4.Promotion of electron from lower sub-level to higher sub-level of the valence shell is essential for hybridization.
Posted Date:-2021-09-29 04:45:17
What is not true for resonance?
1.Cannonical forms differ only in electronic arrangement
2.Cannonical forms differ in atomic as well as electronic arrangement
3.Cannonical forms have same number of unpaired electrons
4.Cannonical forms are hypopthetical.
Posted Date:-2021-09-29 04:45:17
When a molecule is formed by the combination of atoms
1.only repulsive forces operate
2.only attractive forces operate
3.none of these forces operate
4.both A and B operate
Posted Date:-2021-09-29 04:45:17
Which combination of atomic orbitals is not allowed according to MO theory?
1.Px - Px
2.Px - Py
3.Py - Py
4.Pz - Pz.
Posted Date:-2021-09-29 04:45:17
Which of the following bond is most polar?
1.C-H
2.N-H
3.S-H
4.O-H
Posted Date:-2021-09-29 04:45:17
Which of the following bonds will be non polar?
1.N-H
2.C-H
3.F-F
4.Cl-Cl
Posted Date:-2021-09-29 04:45:17
Which of the following does not conduct electricity?
1.Molten NaOH
2.Molten KOH
3.solid NaCl
4.Aqueous NaCl.
Posted Date:-2021-09-29 04:45:17
Which of the following groups of atoms gain electrons readily?
1.N P As
2.Li Na K
3.Cl Br I
4.Ca Sr Ba
Posted Date:-2021-09-29 04:45:17
Which of the following molecule has dipole moment greater than zero?
1.3 3-Diethylpentane
2.trans-2-pentene
3.2 2 3 3-tetramethyl butane
4.Neopentane.
Posted Date:-2021-09-29 04:45:17
Which of the following pairs of compound will not form H-bonds with each other?
1.Ethanol-methanol
2.Ethanol-water
3.Chloroform-acetone
4.Carbon tetrachloride-acetone.
Posted Date:-2021-09-29 04:45:17
Which of the following phenomenon will occur when two atoms of the elements having same spin of electron approach for bonding?
1.Orbital overlap will not occur
2.Bonding will not occur
3.Both (a) (b) are correct
4.None of the above are correct.
Posted Date:-2021-09-29 04:45:17
Which of the following theory provides explanation about paramagnetic nature of oxygen?Electronic theory of valency
1.
2.Valency bond theory
3.Molecular orbital theory
4.All of the above.
Posted Date:-2021-09-29 04:45:17
Which one of the following bonds is weakest?
1.ionic bond
2.covalent bond
3.metallic bond
4.van der Waal forces.
Posted Date:-2021-09-29 04:45:17
Which out of the following has the highest melting point?
1.Cesium fluoride
2.Ammonia
3.Chloroform
4.Helium
Posted Date:-2021-09-29 04:45:17
Which overlap would result the strongest bond?
1.s-s
2.sp-sp
3.s-p
4.p-p
Posted Date:-2021-09-29 04:45:17