| 1 |
The nature of interparticle forces in benzene is
|
A. Dipole-dipole interaction
B. Dispersion force
C. Ion-dipole interaction
D. H-bonding
|
| 2 |
Water H2O is liquid while hydrogen sulphide H2S is a gas beause
|
A. Water has higher molecular weight
B. Hydrogen sulphide is a weak acid
C. Sulphure has high electronegativity than oxyhe
D. Water molecules associate through hydrogen bonding
|
| 3 |
When elements of group I react with the elements of group VIA theory form
|
A. Ionic bond
B. Covalent bond
C. Polar bond
D. None
|
| 4 |
Antibonding MO is formed by
|
A. Addition of atomic orbitals
B. Substraction of atomic orbitals
C. Multiplication of atomic orbitals
D. None of these
|
| 5 |
When two hydrogen atoms approach to form a chemical bond
|
A. The repulsive forces dominate the attractive forces
B. The attractive forces, dominate the repulsive forces
C. The energy of atoms increases
D. The two atoms start ionization
|
| 6 |
In a group the atomic size increase downward due to
|
A. Addition of electronic shells
B. Increase in the proton number
C. Repulsion of electrons
D. All of the above
|
| 7 |
Inter molecular forces in solid hydrogen are
|
A. Covalent forces
B. Van der Waal forces or London dispersion forces
C. Hydrogen bonds
D. All of these
|
| 8 |
Generally the bond formed by metals with non-metals is
|
A. Ionic
B. Covalent
C. Polar
D. Non- polar
|
| 9 |
A bond between two atoms may be obtained by sharing of electrons such a bond is called
|
A. An ionic bond
B. A coordinate bond
C. A dative bond
D. A covalent bond
|
| 10 |
Three sp2hybrid are co-planar at an angle of
|
A. 104.5°
B. 109.5°
C. 107°
D. 120°
|
| 11 |
Shape of CIO3is
|
A. Triangular pyramidal
B. Tetrahedral
C. Triangular planar
D. Triangular bipyramidal
|
| 12 |
Which of the following geometry is associated with the compound in which the central atom assumes sp3d hybridization?
|
A. Planar
B. Pyramidal
C. Angular
D. Trigonal bipyramidal
|
| 13 |
Mg becomes isoelectronic with neon when it
|
A. Loses two electrons
B. Gains two electrons
C. Loses 1 electron
D. Gains 1 electron
|
| 14 |
Generally electron affinities for elements in a period from left to right
|
A. Decreases
B. Increases
C. Remain same
D. Increases alternatively
|
| 15 |
The ionic bonds are
|
A. Unidirectional
B. Bi-directional
C. Non-directional
D. Multi-directional
|
| 16 |
Which of the hydrogen halides has the highest percentage of ionic character
|
A. HCl
B. HBr
C. HF
D. HI
|
| 17 |
The overlapping of two partially filled atomic orbital is in such a way that the probability of finding the electron pair is maximum along the axis joining the two nuclei, the bond is
|
A. Sigma bond
B. Pi bond
C. Ionic bond
D. Non-polar bond
|
| 18 |
Which one of these is weakest?
|
A. Ionest bond
B. Covalent bond
C. Metallic bond
D. Van der Waal's forces
|
| 19 |
Which of the following species is paramagnetic?
|
A. CO2
B. NO
C. O2-
D. CN
|
| 20 |
If two lone pairs are present then bond angle of tetrahedral compound reduces to ______ degrees
|
A. 109.5°
B. 107.5°
C. 104.5°
D. None
|
| 21 |
Among the alkaline earth metals the element forming predominantly covalent compounds is
|
A. Be
B. Mg
C. Sr
D. calcium
|
| 22 |
Electronegativity values of the elements F, CI and Br vary
|
A. F > CI > Br
B. Br > CI > F
C. Cl > Br > F
D. CI > F > Br
|
| 23 |
A molecule in which sp2hybrid orbitals are used by the central atom in forming covalent bonds in
|
A. He2
B. SO2
C. PCl5
D. N2
|
| 24 |
Fluorine molecule is formed by
|
A. The axial p-p overlap
B. The sidewise p-p overlap
C. The axial s-p overlap
D. The overlap of two sp2hybrid orbitals
|
| 25 |
The electronegativeities of F,Cl,Br and I are 4.0,3.0,2.8,2.5 respectively.Hydrogen halide with a high percentage of ionic character is
|
A. HF
B. HCL
C. HBr
D. HI
|
| 26 |
The shape of the molecule SF2Cl2is
|
A. Trigonal bipyradmidal
B. Cubic
C. Octahedral
D. Tetrahedral
|
| 27 |
Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding?
|
A. Orbital overlap will not occur
B. Bonding will not occur
C. Both (A) and (B) are correct
D. None of the above are correct
|
| 28 |
The equation for the first ionization energy of hydrogen is
|
A.
B.
C.
D.
|
| 29 |
Planar geometry of molecules is due to
|
A. sp3hybridization
B. sp2hybridization
C. sp hybridization
D. P - p overlap
|
| 30 |
An ionic compound M2S3is formed by the metal M,, the metal is
|
A. Ca
B. Ba
C. K
D. Al
|