| 1 |
SnCI2have ______ shape
|
A. Planner
B. Tetrahedral
C. Angular
D. None
|
| 2 |
Which one of these is weakest?
|
A. Ionest bond
B. Covalent bond
C. Metallic bond
D. Van der Waal's forces
|
| 3 |
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+
|
| 4 |
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
|
| 5 |
|
A. Excitantion of an electron from 2s to 2p-orbital
B. Transfer of three electrons from B to the other atoms
C. Excitation of two electrons form 2s orbital to 2p orbital
D. Formation of molecular ion
|
| 6 |
In OF2, number of bond pairs and Ione paris of electrons are respectively
|
A. 2,6
B. 2,8
C. 2,10
D. 2,9
|
| 7 |
Which of the following molecules have its central atom sp2hybridized
|
A. CH4
B. C2H2
C. C2H4
D. CCl4
|
| 8 |
Shape of CIO3is
|
A. Triangular pyramidal
B. Tetrahedral
C. Triangular planar
D. Triangular bipyramidal
|
| 9 |
When an electron is absorbed in an empty or partially filled orbital of an atom, the energy released is called
|
A. Ionization energy
B. Potential energy
C. Electron affinity
D. Bond energy
|
| 10 |
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
|
| 11 |
Among the alkaline earth metals the element forming predominantly covalent compounds is
|
A. Be
B. Mg
C. Sr
D. calcium
|
| 12 |
The structure of ICI2is
|
A. Trigonal
B. Trigonal bipyramidal
C. Octahedral
D. Square planar
|
| 13 |
The bond order for He2molecule is
|
A. zero
B. 1/2
C. 1
D. 2
|
| 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 formation of compounds like PF5, BCI3, SF6indicates that
|
A. These halides are ionic
B. These halides are covalent
C. They are Lewis acids
D. Octet rule not obeyed so the rule is not universal
|
| 16 |
Which of the following species is paramagnetic?
|
A. CO2
B. NO
C. O2-
D. CN
|
| 17 |
Tripple bond is present in
|
A. O2
B. H2
C. N2
D. Cl2
|
| 18 |
According to VSEPR theory, the shape of the water molecule is
|
A. Octahedral
B. Distorted tetrahedral
C. Planar triangle
D. Linear
|
| 19 |
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
|
| 20 |
Antibonding MO is formed by
|
A. Addition of atomic orbitals
B. Substraction of atomic orbitals
C. Multiplication of atomic orbitals
D. None of these
|
| 21 |
Mg becomes isoelectronic with neon when it
|
A. Loses two electrons
B. Gains two electrons
C. Loses 1 electron
D. Gains 1 electron
|
| 22 |
In sp2hybridization bond angle is _____
|
A. 120°
B. 180°
C. 109.5°
D. None
|
| 23 |
Molecular orbital picture of N2 indicates
|
A. One unpaired electron
B. Two unpaired electron
C. No unpaired electron
D. None of these
|
| 24 |
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
|
| 25 |
All covalent bonds formed between the two atoms are non-polar when
|
A. Covalent bond between two non-metal atoms
B. Covalent bond between metal and non-metal
C. Covalent bond between two atoms of same element
D. Covalent bond between metal atoms
|
| 26 |
The three N - Hσ-bonds are made by
|
A. sp3- s overlap
B. sp2- s overlap
C. P - p overlap
D. sp - overlap
|
| 27 |
Elements have the tendency to attain 8 electrons in their valence shell. This is known as
|
A. Octer rule
B. Hunds rule
C. Pauli exclusion principle
D. Auf ban principle
|
| 28 |
When of the following is isolelectronic with krypton
|
A. Ca++
B. Al+++
C. Br-1
D. I-1
|
| 29 |
Which of the following molecules have sp3hybridized carbon
|
A. CH4
B. C2H4
C. C2H2
D. CO2
|
| 30 |
Which for the following has no dipole moment
|
A. HCI
B. H2S
C. H2O
D. CO2
|