More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
MDCAT Chemistry Online Test MCQs With Answers
Question # 1
For formation of ionic bond, electronegativity difference should be
Choose an answer
Equal to zero
Equal to 0.5
More then 1.7
Less than 1.7
Previous
Skip
Next
Question # 2
Which of the following substance has maximum critical temperature
Choose an answer
H
2
O
N
2
SO
2
Ne
Previous
Skip
Next
Question # 3
If the energy of the activated complex lies close to energy of reactants, it means that reaction is
Choose an answer
Slow
Exothermic
Endothermic
Exothermic and fast
Previous
Skip
Next
Question # 4
The Complete oxidation of ethanol produces first Ethanal than
Choose an answer
Ethanal
Propanone
Ethanoic acid
Benzoic acid
Previous
Skip
Next
Question # 5
According to kinetic theory of gases kinetic energy depends on
Choose an answer
Temperature
Collision
Pressure
Atomic number
Previous
Skip
Next
Question # 6
which of the following is a typical transition metal?
Choose an answer
Sc
Y
Ra
Co
Previous
Skip
Next
Question # 7
The strongest conjugate base is
Choose an answer
OH-
CH3O-
C6H5O-
CH3COO-
Previous
Skip
Next
Question # 8
The reaction which is zero order
Choose an answer
Decomposition ofN2O5
Formation of Glucose in plant
Formation of Fel2
Chorination of methane in sunlight
Previous
Skip
Next
Question # 9
Neutralization of acid-base is
Choose an answer
Spontaneous
Exothermic
Non spontaneous
Both "a" and "c
Previous
Skip
Next
Question # 10
In Case of elements the polymorphism is called
Choose an answer
Isotopic form
Allotropy
Isomorphism
Crystalline forms
Previous
Skip
Next
Question # 11
The volume of a real gas
Choose an answer
is constant
increases with T decrease
becomes zero at absolute zero
never becomes zero
Previous
Skip
Next
Question # 12
Which of the following does not give flame test?
Choose an answer
Li
Ba
Mg
Sr
Previous
Skip
Next
Question # 13
One molecule of gas is approximately Distance______ times its own diameter from its neighbour at room temperature.
Choose an answer
30
3000
3
300
Previous
Skip
Next
Question # 14
The number of atoms in 0.004 g of magnesium is close to
Choose an answer
24
2 x 10
20
10
20
6.02 x 10
23
Previous
Skip
Next
Question # 15
Which of the following statement is correct if the intermolecular forces in liquids A,B and C are in the order A < B < C?
Choose an answer
B evaporates more readily than A
B evaporates less readily than C
A and B evaporates at the same rate
A evaporates more readily than C
Previous
Skip
Next
Question # 16
In [Ti (H2O)]3+ which colour is transmitted
Choose an answer
Yellow
Blue and red
Blue and yellow
red and yellow
Previous
Skip
Next
Question # 17
The smallest unit of a crystal that shows all the characteristic properties of its pattern is called
Choose an answer
cell
electrolyte
unit cell
crystal
Previous
Skip
Next
Question # 18
If a reaction involves only solids and liquids, which of the following is true?
Choose an answer
ΔH = ΔE
ΔΗ =ΔΕ
ΔH>ΔΕ
AH =AE +nRT
Previous
Skip
Next
Question # 19
Which one of the following is more acidic
Choose an answer
Phenol
Carboxylic acid
Alcohols
Amines
Previous
Skip
Next
Question # 20
The unit of pressure ______ is commonly used by meteorologists
Choose an answer
mm of Hg
Kilopascal
Millibar
Pound per square inch
Previous
Skip
Next
Question # 21
In crystal of sodium chloride, a Cl-1 ion present at the corner of cube is shared between how many cubes?
Choose an answer
8
4
6
10
Previous
Skip
Next
Question # 22
If there are weak intermolecular forces in a liquid, it will be
Choose an answer
more volatile
less volatile
more dense
less heavy
Previous
Skip
Next
Question # 23
Which of the following contains I mole of the stated particles
Choose an answer
Chlorine molecules in 35.5 g of chlorine gas
Electrons in 1 g of hydrogen gas
Hydrogen ions in 1 dm³ of 1 mol dm¯³ aqueous sulfuric acid
Oxygen atoms in 22.4 dm³ of oxygen gas at STP
Previous
Skip
Next
Question # 24
The pH of ideal buffer is
Choose an answer
10
7
Less than 7
0
Previous
Skip
Next
Question # 25
Which of the following is an example of body centred cube?
Choose an answer
Magnesium
Zinc
Copper
Sodium
Previous
Skip
Next
Question # 26
For an ideal gas, number of mole in terms of its pressure P, temperature T and gas constant is
Choose an answer
PT/R
PRT
PV/RT
RT/P
Previous
Skip
Next
Question # 27
The structure of protein helps protein to
Choose an answer
be in proper shape
attach substrate
perform is function
All of these
Previous
Skip
Next
Question # 28
Elements of group IV-A are
Choose an answer
neither strongly electropositive nor strongly electronegative
strongly electropositive
strongly electronegative
none of these
Previous
Skip
Next
Question # 29
Which of the following liquid has high vapour pressure?
Choose an answer
H
2
O
ether
CH
3
OH
C
2
H
5
OH
Previous
Skip
Next
Question # 30
Low IE is a symbol of
Choose an answer
high electronegativity
small size
High electron affinity
Metallic character
Previous
Skip
Next
Question # 31
The heat of hydrogenation of most of the alkene is about
Choose an answer
120 kJ/mol
100 kJ/mol
140 kJ/mol
105 kJ/mol
Previous
Skip
Next
Question # 32
The element which shows highest binding energy
Choose an answer
V
T
So
Cr
Previous
Skip
Next
Question # 33
The rate diffusion of H
2
is 4 times than the of an unknown gas at same temperature and pressure, the molecular mass of unknown gas is
Choose an answer
32
16
4
64
Previous
Skip
Next
Question # 34
The value of critical temperature of a gas depends upon its:
Choose an answer
Size
Intermolecular forces in it
Shape
All of above
Previous
Skip
Next
Question # 35
What is true about an alcohol and phenol
Choose an answer
Both are more acidic than water
Both react with NaOH
Both produce CO2 with Na2CO3
Both, produce H2 with Na
Previous
Skip
Next
Question # 36
Which of the following is an example of diffusion?
Choose an answer
Spreading of smell of flowers in garden
Steam condensing on a cold window
Bubbles rising in a beaker of boiling water
All of above
Previous
Skip
Next
Question # 37
Choose an answer
Previous
Skip
Next
Question # 38
If the reaction "P+Q→R+S' is deseribed as being of zero order with respect to P, it means that
Choose an answer
P is catalyst in this reaction
P molecules do not possess sufficient energy to react
The concentration of P does not change during the reaction
The rate of reaction is independent of the concentration of P
Previous
Skip
Next
Question # 39
The particles in solids are
Choose an answer
widely separated and moving randomly
widely separated not moving
moving randomly but not separated
close together and vibrating slightly
Previous
Skip
Next
Question # 40
State of hybridization of carbon in the carbocation is
Choose an answer
sp3
sp
sp2
dsp2
Previous
Skip
Next
Question # 41
Which of the following statement about graphite is not true?
Choose an answer
The coordination number of carbon atoms is 4.
the carbon atoms are arranged layers.
the layers in graphite are attracted to each other weak forces.
the corbon atoms use only three of their four outer electrons for covalent bonding.
Previous
Skip
Next
Question # 42
Most reactive among the following
Choose an answer
Li
Mg
Ca
Na
Previous
Skip
Next
Question # 43
Which one of the following statements is wrong for gases?
Choose an answer
gases do not have a definite shape and volume
volume of the gas is equal to volume of container confining the gas
confirmed gas exerts uniform pressure on the walls of its container in which it is enclosed
mass of gas cannot be determined by weighing a container in which it is enclosed
Previous
Skip
Next
Question # 44
In which molecule. all atoms are coplanar?
Choose an answer
CH4
BF3
NH3
PH3
Previous
Skip
Next
Question # 45
Partial pressure of gases in a mixture depend upon:
Choose an answer
Number of moles
Number of protons
Number of electrons
Number of neutrons
Previous
Skip
Next
Question # 46
As the number of carbon atoms increases the number of isomers also increase. The 5 C compound pentane has as many as
Choose an answer
3 isomers
5 isomers
6 isomers
10 isomers
Previous
Skip
Next
Question # 47
The element which exhibits maximum catenation property is
Choose an answer
C
Pb
Ge
Sn
Previous
Skip
Next
Question # 48
At higher temperature isotherm of Boyle's law moves away from both axis, is due to increase in:
Choose an answer
pressure
No. of moles
Volume
All
Previous
Skip
Next
Question # 49
Which of these are isomrophous to one another NaCl, NH
4
Br, K
2
CrO
4
, K
2
SO
4
Choose an answer
NaCl and NH
4
Br both cubic
NH
4
Br and K
2
SO
4 both tetragonal
K
2
CrO
4 and
K
2
SO
4
orthorhombic
NaCl and K
2
SO
4
both rhobohedral
Previous
Skip
Next
Question # 50
which one of the following statements bout negative ions is incorrect?
Choose an answer
they are also know as anions
they are formed when atoms gain electrons
they are large than the atom from which they were formed
they are smaller than the atom from which they were formed
Previous
Skip
Next
Question # 51
Which one of the followings has polar covalent bonds hut is overall nom-polar molecule:
Choose an answer
HF
CO
2
CH
4
N
2
Previous
Skip
Next
Question # 52
The volume of 2.8 g of carbon monoxide at 27°C and 0.821 atm pressure is (R = 0.0821 lit.atm.Mol
-1
K
-1
)
Choose an answer
30 L
3 L
0.3 L
1.5 L
Previous
Skip
Next
Question # 53
If Cl2 is passed through hot NaOH. NaCIO3 is formed and the oxidation number of CI changes from
Choose an answer
-1 to 0
0 to +5
0 to-1
0 to +1
Previous
Skip
Next
Question # 54
The boiling point of glycerin at 1 atmospheric pressure is:
Choose an answer
290°C
390°C
190C°
210°C
Previous
Skip
Next
Question # 55
An ideal gas expands according to PV=constant. On expansion, the temperature of gas
Choose an answer
will rise
will drop
cannot be determined because the exteral pressure is not known
will remain same
Previous
Skip
Next
Question # 56
The formation of ester from acetic aciad in presence of acid and ethanol is a
Choose an answer
Nucleophilic substitution reaction
Nucleophilic addition reaction
Electrophilic substituion reaction
Electrophilic addition reaction
Previous
Skip
Next
Question # 57
Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?
Choose an answer
FeCl2
Cl+
FeCl-4
Cl2
Previous
Skip
Next
Question # 58
The species which are produced by heterolytic bond breaking and can act as electron pair donor
Choose an answer
Free radicals
Cations
Nucleophiles
electrophile
Previous
Skip
Next
Question # 59
If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be:
Choose an answer
Remain uncharged
Double
Reduced
Increased four times
Previous
Skip
Next
Question # 60
Reaction of acetic acid with LiAIH4 gives
Choose an answer
Ethanol
Ethanal
Ethane
Ethyl acetate
Previous
Skip
Next
Question # 61
The partial pressure of 0
2
in the lungus is
Choose an answer
116 torr
159 torr
560 torr
760 torr
Previous
Skip
Next
Back