Chemistry - Chemical Bonding
Exam Duration: 60 Mins Total Questions : 30
The bond which is present between water molecules is
- (a)
electrovalent bond
- (b)
covalent bond
- (c)
hydrogen bond
- (d)
van der Waals bond
The octet rule is not valid for which one of the following molecule?
- (a)
CO2
- (b)
H2S
- (c)
NH3
- (d)
BF3
What are the types of bonds present in CuSO4 .5H2O?
- (a)
Electrovalent and covalent
- (b)
Electrovalent and coordinate
- (c)
Electrovalent, covalent, coordinate and hydrogen bond
- (d)
Covalent and coordinate covalent
In the covalent valency
- (a)
electrons are equally shared by the atoms
- (b)
electrons are one atom are shared with two atoms
- (c)
hydrogen bond is formed
- (d)
None of the above
An atom of sodium loses one electron and chlorine atom accepts one electron. This result the formation of sodium chloride molecule. This type of molecule will be
- (a)
coordinate
- (b)
covalent
- (c)
electrovalent
- (d)
metallic bond
Consider the following statements about ionic bond.
1. Ionic bond comes into existence by the transference of electrons between the participating atoms.
2. The atom losing electron changes into cation while the other atom gaining electron converted into anion.
Which of the statements given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
1 and 2
- (d)
None of these
Match the column I with column II and select the correct answer using the codes given below the columns.
Column I (Covalent compound) |
Column II (Geometrical shape) |
A. Water | Angular |
B. Ammonia | Pyramid |
C. Carbon dioxide | Collinear |
D. Methane | Tetrahedral |
- (a)
A B C D 1 2 3 4 - (b)
A B C D 2 3 4 1 - (c)
A B C D 3 4 1 2 - (d)
A B C D 4 1 2 3
A coordinate bond id formed when an atom in a molecule has
- (a)
electric charge on it
- (b)
all its valency electrons shared
- (c)
a single unshared electron
- (d)
one or more unshared electron
A metallic bond is
- (a)
ionic
- (b)
polar covalent
- (c)
non-polar covalent
- (d)
electrostatic in nature
When two isomeric liquid compounds 'A' and 'B' form H-bonding are heated, compound 'A' boils at lower temperature than 'B'. Which of the following is correct for 'A' and 'B'?
- (a)
Intermolecular H-bonding present in 'A'.
- (b)
Intramolecular H-bonding present in 'A'.
- (c)
Intramolecular H-bonding present in 'B'.
- (d)
None of the above
The shape of carbon dioxide molecule is
- (a)
octahedral
- (b)
tetrahedral
- (c)
linear
- (d)
trigonal
Which of the following combination of atomic orbitals never from the sigma bond?
- (a)
sp3 _ sp3
- (b)
sp3 _ sp2
- (c)
sp _ s
- (d)
py - py
Consider the following statements.
1. Probability of finding the electron in the bonding molecular orbital is more than combining atomic orbitals.
2. Bonding molecular orbitals are formed when different sign of orbitals are overlapped.
Which of the following statements given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
Consider the following statements.
1. All single bonds are sigma bonds.
2. Multiple bonds contain one sigma bond only, the other bonds are pi bonds.
3. pi bonds is never formed alone.
Which of the statements given above are correct?
- (a)
1, 2 and 3
- (b)
1 and 2
- (c)
1 and 3
- (d)
2 and 3
With reference to hydrogen bonding, consider the following statements.
1. The organic compounds like alkanes, alkenes, alkynes are soluble in water due to absence of H-bonding.
2. Alcohols, organic acids, amines are soluble in water due to the presence of H-bonding.
Which of the statements given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
1 and 2
- (d)
None of these
Ionic solids
- (a)
are hard and brittle
- (b)
are generally high melting points
- (c)
can be melted to form liquids that are electrical conductors
- (d)
All of the above
When a chemical bond is formed, there is decrease in
- (a)
kinetic energy
- (b)
potential energy
- (c)
repulsive force
- (d)
attractive force
Which of the following bonds is the weakest?
- (a)
Coordinate bond
- (b)
Hydrogen bond
- (c)
van der Waals' forces
- (d)
Covalent bond
Match Column I with Column II and select the correct answer using the codes given below the Columns.
Column I (Example) |
Column II (Bond angle) |
H2O | 104\(^{o}\)27' |
CO2 | 180\(^{o}\) |
SO2 | 109\(^{o}\)28' |
CH4 | 120\(^{o}\) |
- (a)
A B C D 1 2 4 3 - (b)
A B C D 2 4 3 1 - (c)
A B C D 4 3 1 2 - (d)
A B C D 3 1 2 4
In ammonia, H--N--H bond angle is
- (a)
106.7\(^{o}\)
- (b)
109\(^{o}\)
- (c)
104\(^{o}\)
- (d)
180\(^{o}\)
Cation is formed when
- (a)
atom gains electrons
- (b)
atom losses electrons
- (c)
proton is lost by the atom
- (d)
atom shared by electrons
The bond between two identical non-metallic atom has a pair of electron?
- (a)
Unequally shared between two atoms
- (b)
Transferred completely from one atom to another
- (c)
With identical spins
- (d)
Equally shared between them
The electrovalent compound is made up of
- (a)
electrically charged molecules
- (b)
neutral molecules
- (c)
neutral atoms
- (d)
electrically charged atoms or group of atoms.
Electrovalent bond formation depends on
- (a)
ionisation energy
- (b)
electron affinity
- (c)
lattice energy
- (d)
All of these
Consider the following statements.
1. Formation of cations occurs by loss of electrons.
2. Formation of anions occurs by gain of electrons.
Which of the statements given above are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
1 and 2
- (d)
None of these
Molten NaCl is a good conductor of electricity is due to
- (a)
free electrons
- (b)
free ions
- (c)
free molecules
- (d)
None of these
Consider the following statements.
1. Metallic bond are malleable and ductile.
2. Covalent compounds are generally non-conductor of electricity.
3. Ionic compounds are good conductor of electricity in molten or liquid state.
Which of the statements given above are correct?
- (a)
1 and 2
- (b)
1 and 3
- (c)
2 and 3
- (d)
1, 2 and 3
Consider the following statements.
1. The dipole moment helps to predict whether a molecule in polar or non-polar.
2. The melting point and boiling point of Coordinate compounds are higher than covalent compound but lesser than the ionic compounds.
Which of the statements given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
1 and 2
- (d)
None of the above
Antacids are commonly used to get rid of acidity in the stomach. A commonly used antacid is
- (a)
sodium hydrogen phthalate
- (b)
magnesium hydroxide
- (c)
calcium hydroxide
- (d)
manganese acetate
On the labels of the bottles, some soft drinks are claimed to be acidity regulators. They regulate acidity using
- (a)
carbon dioxide
- (b)
bicarbonate salts
- (c)
both carbon dioxide and bicarbonate salts
- (d)
carbon dioxide and lime