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MDCAT Chemistry Online Test MCQs With Answers
Question # 1
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
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Question # 2
Enthalpy of a system can be calculated by which of following relationship
Choose an answer
q=ΔΕ
q=m×S×∆T
q=pv
q=m×v×∆T
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Question # 3
The critical temperature of CO
2
______°C at 73 atm critical pressure
Choose an answer
21.142
28.892
31.142
35.452
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Question # 4
Oxidation of secondary alcohol produces
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Aldehyde
Ketone
Alkyl halide
Ester
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Question # 5
An example of regulatory protein is
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nucleoprotein
hemoglobin
lactoglobulin
thyroxine
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Question # 6
Which alkaline earth metal makes peroxide?
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Ba
Be
Mg
Ca
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Question # 7
Deep sea divers breath air under increased pressure, therefore they use a mixture of
Choose an answer
96% N
2
and 4% O
2
96% O
2
and 4% N
2
94% N
2
and 6% O
2
94% 0
2
and 6% N
2
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Question # 8
Air at sea level is dense.This is a practical application of
Choose an answer
Boyle's law
Charle's law
Avogadro's law
Dalton's law
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Question # 9
In Boyle's law which of the following pair remains constant:
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Temperature and quality of a gas.
Pressure and quality of a gas.
Temperature and pressure.
Temperature and quantity of a gas.
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Question # 10
Matter having no definite shape and volume is called:
Choose an answer
gas
liquid
solid
plasma
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Question # 11
In van der Waal's equation of state of the gas law,the constant 'b' is measure of
Choose an answer
Intermolecular repulsions
Intermolecular collisions per unit volume
Volume occupied by the molecules
Intermolecular attraction
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Question # 12
In nucleophilie substitution bimolecular reaction the order of reaction with respect to substrate
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2 order
3 order
1st order
Zero order
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Question # 13
The density of ice is 1.00gcm
-3
.
What the volume of steam produced when 1.00-3 of ice is heated to 323
∘C (596K) at a pressure of one atmosphere (101kPa)?
[1 mol a gas occupies 24.0dm
3
at 25a
∘
C(295K)and one atmosphere.]
Choose an answer
0.267 dm
3
1.33 dm
3
2.67 dm
3
48.0 dm
3
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Question # 14
All the following statements are incorrect except:
Choose an answer
all of the gases cannot be liquefied
increase of pressure will not decrease the inter molecular distance in a gas
gas molecules do not attract each other at very low temperature
actual volume of a gas is not negligible at very pressure
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Question # 15
Energy required to remove electron from an atom
Choose an answer
Ionization potential
Electronegativity
Electropositivity
Electron affinity
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Question # 16
The B.P of glycerine at 760 torr pressure is
Choose an answer
200°C
290C°
250C°
262C°
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Question # 17
If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will
Choose an answer
remain unchanged
increase four times
reduce to 1/4
be doubled
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Question # 18
Point out the substance which has maximum vapour pressure at a given temperature?
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Acetone
Water
Ethanol
Acetic acid
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Question # 19
2-propanol on Oxidation gives
Choose an answer
Aldehyde
Carboxylic Acid
Ketone
Alcohol
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Question # 20
Ester with raspberry flavor
Choose an answer
Amyl acetate
Isobutyl formate
Amyl butyrate
Octyl acetate
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Question # 21
At constant temperature when pressure of a gas is plotted against volume, the curve is:
Choose an answer
Slanting straight line.
Parabolic.
Straight line, parallel to pressure axis.
Of neither type.
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Question # 22
Total number of valence electrons in phosphonium ion (PH4-) is
Choose an answer
8
9
12
10
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Question # 23
Elements of group IV-A are
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neither strongly electropositive nor strongly electronegative
strongly electropositive
strongly electronegative
none of these
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Question # 24
Absolute temperature of a gas is proportional to:
Choose an answer
Rotational Kinetic energy
Translational Kinetic energy
Vibrational Kinetic energy
Potential energy
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Question # 25
The strongest conjugate base is
Choose an answer
OH-
CH3O-
C6H5O-
CH3COO-
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Question # 26
The enthalpies of all elements in their standard states are
Choose an answer
Unity
always +ve
always -ve
zero
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Question # 27
The most complex strueture a single polypetide can assume is
Choose an answer
1° structure
2°structure
3° structure
4° structure
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Question # 28
Elements having high ionization potential values are
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metals
non- metal
liquids
solid
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Question # 29
Mathematically, Boyle's law is indicated as:
Choose an answer
VT = K
PT = K
PV = K
None of these
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Question # 30
The surface formed by the breakage of a crystal is called _____ plane
Choose an answer
Crystal
Unit
Cleavage
None
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Question # 31
Liquids are less common than solids and gases because
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They exist in narrow range of temperature and pressure
They have definite volume
Liquid molecules can slide past each other
Molecules contain three type of motion
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Question # 32
The beaker contains slurry of ice and water, the three thermometers Fahrenheit, Kelvin and centigrade placed init. the thermometers are represented as A, B and C respectively, On which thermometer the lowest reading will be?
Choose an answer
B
A
C
both A and B
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Question # 33
4.4 g of CO
2
contains how many litres of CO
2
at STP?
Choose an answer
2.4 litre
2.24 litre
44 litre
22.4 litre
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Question # 34
Which of the following is not the property of liquid crystal
Choose an answer
anisotropic
isotropic
three dimensional arrangement
fluidity
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Question # 35
The value of critical temperature of a gas depends upon its:
Choose an answer
Size
Intermolecular forces in it
Shape
All of above
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Question # 36
Esterification of CH3COOH isreaction
Choose an answer
Acid base
Electrophilic
Redox
Nucleophilic
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Question # 37
The density of methane at 2.0 atmosphere pressure at 27°C is
Choose an answer
0.13 gL
-1
0.26 gL
-1
1.30 gL
-1
26.0 gL
-1
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Question # 38
CO
2
gas is dissolved in water due
Choose an answer
dipole-dipole interactions
higher molecular mass of CO
2
ion dipole attractive forces
hydrogen bonding
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Question # 39
If rate of diffusion of A is 5 times that of B,what will be the density ratio of A and B?
Choose an answer
1/25
1/5
25
5
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Question # 40
Which one of the following elements is the strongest reducing agent?
Choose an answer
Chlorine
Sodium
Magnesium
Aluminium
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Question # 41
Metallic bonds have been explained by many theories. Luis Pauling has proposed a theory called
Choose an answer
molecular orbital theory
electron gas theory
band theory
valence bond theory
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Question # 42
All gases liquefly before reaching at
Choose an answer
273
°K
373
°K
0 K
73
°C
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Question # 43
Molar mass of formic acid in benzene comes out to be
Choose an answer
64
46
32
92
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Question # 44
The highest temperature at which gas can be liquefied and above which liquefaction is impossible is called
Choose an answer
Boiling temperature
Upper consulate temperature
Transition temperature
Critical temperature
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Question # 45
The concentration of product is increasing from 30 mole/dm3 to 40mol/dm3 in 0.5 sec then rate of reaction will be------moledm-3sec-1
Choose an answer
0
20
15
25
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Question # 46
The distribution of energies among the molecules of gases was studied by:
Choose an answer
Maxwell
Coulomb
Newton
Boltzmann
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Question # 47
Diamond and silicon carbide are insoluble in all solvents because
Choose an answer
they have high melting and boiling points
absence of three electrons
they are huge giant three dimensional molecules (macromolecules)
their unit cells have tetrahedral geometry
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Question # 48
Pressure remaining constant at which temperature the volume of a gas will become twince of what it is at 0
∘C
.
Choose an answer
546
∘C
200
∘C
546
K
273K
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Question # 49
Which ion has maximum number of unpaired electrons in 3d subshell and shows maximum paramagnetic behavior?
Choose an answer
Cr+3
Ni+2
Co+2
Fe+3
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Question # 50
Which of the following are not known to form compounds in more than one oxidation state?
Choose an answer
Transition metals
Halogens
Alkali metals
Noble gases
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Question # 51
Which of the following is a strong acid
Choose an answer
CH3COOH
C2H5OH
HCOOH
Phenol
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Question # 52
what is the exact value of angle in BF3
Choose an answer
90
104.51
119.5
120°
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Question # 53
Crystal lattice with alternate +ve and -ve ions has radius ratio of 0.524.Its coordination number is
Choose an answer
4
3
6
12
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Question # 54
NH
3
shows a maximum boiling point among the hydrides of Vth group elements due to
Choose an answer
very small size of nitrogen
hydrogen bonding between its molecules
enhanced electronegative character of nitrogen
pyramidal structure of NH
3
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Question # 55
Van der Waal's forces exist in
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Polar compounds
Non-polar
Covalent
All types of atoms and molecules
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Question # 56
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
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Question # 57
A semiconductor of Ge can be made p-type by adding
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Trivalent impurity
Tetravalent
Pentavalent impurity
Divalent impurity
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Question # 58
Evaporation causes
Choose an answer
High temperature
High pressure
Cooling
Vapour
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Question # 59
Joule is a unit of energy which is defied as
Choose an answer
Kgm
-2
s
-2
Kgm
2
s
-1
Kgms
-2
Kgm
2
s
-2
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Question # 60
Substance that does not show the process of sublimation is
Choose an answer
K2Cr2O7
iodine
naphthalene
NH4CI
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Question # 61
Haemoglobin molecule is how many times heavier than helium atom
Choose an answer
68000 times
17000 times
,34000 times
, 1700 times
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