| 1 |
The covalent bonds are
|
A. Unidirectional
B. Bi-directional
C. Non-directional
D. Multi-directional
|
| 2 |
The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1: 1 is
|
A. Distrillation
B. Crystallization
C. Vapourisation
D. Colour spectrum
|
| 3 |
The bond angle H - O - H in ice ins closest to
|
A. 120° , 28'
B. 60°
C. 90°
D. 109°
|
| 4 |
Which carbon is more electronegative?
|
A. sp3- hybridized carbon
B. sp-hybridized carbon
C. sp2-hybridized carbon
D. always same irrespective of its hybrid state
|
| 5 |
The tendency of an atom to attract shared electron pair towards itself is called
|
A. Covelent bond
B. Electronegativity
C. Ionization potential
D. Electronic affinity
|
| 6 |
From the difference between expected bond energies for the normal covalent bond and experimentally determined values Pauling calculated the values of
|
A. Ionization potential of elements
B. Electron affinity of elements
C. Electronegativity of elements
D. Bond length
|
| 7 |
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
|
| 8 |
Ionization energies increase from left to right along the period due to
|
A. Increase in nuclear charge
B. Repulsion of electron increases
C. Repulsion of protons increase
D. Atomic size increase along the period
|
| 9 |
Which of the following has zero depole-moment?
|
A. CIF
B. PCl3
C. SiF4
D. CFCl4
|
| 10 |
Nitrogen in NH3is sp3hybridized but the bond angle in NH3is 107° and not 109.5° due to
|
A. sp3orbital planar
B. sp3orbital trigonal
C. Repulsion between lone pair and bonded pairs
D. None of them
|
| 11 |
Ionic radius, in a period from left to right
|
A. Increases
B. Decreases
C. Decreases then increases
D. Increases and decreases
|
| 12 |
Which is made by coordinate covalent bond
|
A. H3O+
B. H2O
C. CH4
D. HCl
|
| 13 |
The bond order in No is 2.5 while that in NO+is 3.Which of the following statements is true for these two species?
|
A. Bond length in NO+is greater than in NO
B. Bond length in unpredictable
C. Bond length in NO+is equal to that in NO
D. Bond length in NO is greater than in NO+
|
| 14 |
The geometry of 4 sp3hybrid orbitals on an atom is
|
A. Square planar
B. Tetrahedral
C. Trigonal planar
D. Linear
|
| 15 |
Mg becomes isoelectronic with neon when it
|
A. Loses two electrons
B. Gains two electrons
C. Loses 1 electron
D. Gains 1 electron
|
| 16 |
Coordinate covalent bond is present in the molecules
|
A. H2O
B. BF3
C. SiO2
D. SO2
|
| 17 |
The shape of CIO-3according to valence shell electron pair repulsion theory will be
|
A. Planar triangle
B. Pyramidal
C. Tetrahedral
D. Square planar
|
| 18 |
Atomic number of Al is 13. When it forms ionic bond with oxygen the number of electrons lost by 1 Al atom is
|
A. 1
B. 2
C. 3
D. 4
|
| 19 |
The driving force for making a bond is
|
A. To attain noble gas electronic configuration
B. To make soled compounds
C. To make different compounds
D. To make gaseous substances
|
| 20 |
The electronegativity of elements in a period from left to right
|
A. Decreases
B. Increases
C. First decreases then increases
D. First increases then decreases
|
| 21 |
The bond angles in methane CH4are equal to
|
A. 109.5°
B. 107.5°
C. 104.5°
D. 120°
|
| 22 |
Which of the following molecules have its central atom sp2hybridized
|
A. CH4
B. C2H2
C. C2H4
D. CCl4
|
| 23 |
Which of the following molecules have multiple bonds
|
A. CH4
B. C2H4
C. C2H6
D. CCI4
|
| 24 |
Shape of CIO3is
|
A. Triangular pyramidal
B. Tetrahedral
C. Triangular planar
D. Triangular bipyramidal
|
| 25 |
The shape of gaseous SnCl2is
|
A. Tetrahedral
B. Linear
C. Angular
D. T-shaped
|
| 26 |
Antibonding MO is formed by
|
A. Addition of atomic orbitals
B. Substraction of atomic orbitals
C. Multiplication of atomic orbitals
D. None of these
|
| 27 |
The atomic radius of hydrogen is 37
|
A. Pecometer
B. Manometer
C. Angstrom
D. Micrometer
|
| 28 |
On the basis of VSEPR theory SO2is a
|
A. Liner molecule
B. A bent molecule
C. A strong molecule
D. A gaseous molecule
|
| 29 |
Among the alkaline earth metals the element forming predominantly covalent compounds is
|
A. Be
B. Mg
C. Sr
D. calcium
|
| 30 |
Three sp2hybrid are co-planar at an angle of
|
A. 104.5°
B. 109.5°
C. 107°
D. 120°
|