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MDCAT Chemistry Online Test MCQs With Answers
Question # 1
coordination number of N
a
+ in NaC is:
Choose an answer
1
2
4
6
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Question # 2
Which of the following does not give yellow precipitate with I2+ NaOH
Choose an answer
Acetone
Benzaldehyde
Acetildehyde
Acetophenone
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Question # 3
Air can be distilled fractionally because the constiltuents of the air:
Choose an answer
have different densities
can be liquefied
are gases at room temperature
have different boiling points
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Question # 4
Which is correct?
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1 mm Hg = 1 torr = 1 atm
1 mm Hg = 760 torr = 1 atm
760 mm Hg = 760 torr = 1 atm
760 mm Hg = 1 torr = 1 atm
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Question # 5
Lind's ,method for liquefaction of gases is based on the principle of:
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Graham's law of diffusion
Joule Thomson effect
Avogadro's hypothesis
Dalton's law of partial pressure
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Question # 6
In voltaic cell a saht bridge is used in order to
Choose an answer
Pass the electric current
Prevent the flow of ions
Mix solutions of two half cells
Allow movement of' ions between two cells
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Question # 7
Collagen is a fibrous protein present most abundantly in
Choose an answer
heart
nucleus
connective tissues
Arteries
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Question # 8
The enzymes that catalyse the addition or removal of ammonia are:
Choose an answer
Lyases
Ligases
Transferases
Kinses
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Question # 9
Which of the following is not a correct postulate of the kinetic theory of gases
Choose an answer
the gas molecules are in random motion
the collision between the molecules are perfectly elastic
the average kinetic energies of different gases are equal at a particular temperature
the pressure exerted on the walls of the container is due to intermolecular forces
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Question # 10
For a chemical reaction in which one of the reactant also act as solvent, the order will be
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First order
Third order
Second order
pseudo-first order
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Question # 11
Polarizability is responsible for intermolecular forces and it
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increases down the group
decreases down the group
almost remains the same
increased along a period
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Question # 12
The synthesis of ethene from ethyl alcohol is a reaction
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Dehydration
Polymerization
Addition
Substitution
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Question # 13
Which of the following is not a postulate of the kinetic theory of gases?
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when gas particles collide, their total kinetic energy increases
gases consist of molecules in a constant state of random motion
when gas particles collide their total kinetic energy does not change at all
The gas particles travel in straight lines unit they collide with one another or with the walls of the container
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Question # 14
At different temperature, the vapour pressure of water is
Choose an answer
different
same
low
high
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Question # 15
Which of the following alcohol cannot be produced by treatment of aldehydes or ketones with NaBH4
Choose an answer
I-propanol
2-Methyl-2-propanol
2-propanol
Ethanol
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Question # 16
The gas which obeys the gas laws at all conditions of temperature and pressure is
Choose an answer
ideal gas
perfect gas
real gas
noble gas
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Question # 17
The kinetic energy of three moles of gas is:
Choose an answer
3/2 RT
3 RT
1/2 RT
2 RT
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Question # 18
In the equation PV = nRT which one cannot be numerically equal to R
Choose an answer
8.31 x 10
7
erg
7
K
-1
mol
-1
8.31 x 10
7
dynes Cm K
-1
mol
-1
8.31 JK
-1
mol
-1
8.31 L atm K
-1
mol
-1
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Question # 19
State of hybridization of carbon in the carbocation is
Choose an answer
sp3
sp
sp2
dsp2
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Question # 20
Equal masses of methane and oxygen are mixed in an empty container at 25∘C.
Choose an answer
1/3
8/9
1/9
16/17
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Question # 21
A graph between P and PV constant temperature and number of moles is parallel to:
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Y-axis
X-axis
Z-axis
Pressure axis
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Question # 22
Compressibility factor for an ideal gas is
Choose an answer
1.5
1.0
2.0
0.5
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Question # 23
SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode
Choose an answer
Zn has less reduction potential than hydrogen and Cu
Zn has high reductionl potential than hydrogen
and Cu
Zn is below electrochemical series than hydrogen and Cu
Zn has least tendency to lose electron
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Question # 24
The B.P of glycerine at 760 torr pressure is
Choose an answer
200°C
290C°
250C°
262C°
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Question # 25
The structure normally associated with ionic bonding is:
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a giant lattice
a simple molecule
a giant molecule
a regular arrangement of ions surrounded by a sea , or cloud, of electrons
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Question # 26
Zine does not show variable oxidation state, because
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Its d-subshell is incomplete
Its d-subshell is complete
It is relatively soft metal
It has two electrons in outermost shell
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Question # 27
Furan is a compound
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Acyclic
Alicyclic
Heterocyclic
non-aromatic
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Question # 28
In nucleophilie substitution bimolecular reaction the order of reaction with respect to substrate
Choose an answer
2 order
3 order
1st order
Zero order
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Question # 29
The most abundant protein in the human body is
Choose an answer
Collagen
Keratin
Myosin
Albumin
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Question # 30
The volume of a gas that is occupied by its one mole at STP is called
Choose an answer
total volume
normal volume
molar volume
atomic volume
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Question # 31
Dehydrohalogenation of secondary butyI bromide will give
Choose an answer
Propene
1-Butene
Butene
2-Butene
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Question # 32
A crystal system in which the unit cell has different all cell lengths but all angles equal to 90
° it is called as
Choose an answer
orthorhombic
triclinic
monoclinic
cubic
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Question # 33
In a closed vessel a gas is heated from 300 K to 600K The kinetic energy becomes remains
Choose an answer
Double
Same
Half
Four times
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Question # 34
The highest oxidation state of manganese is
Choose an answer
+7
-7
+6
+4
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Question # 35
The cause of deviation form ideal behaviour is because
Choose an answer
the actual volume of gas molecules is not negligible
there is force of attraction between molecules of a gas
both a and b
none of these
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Question # 36
At compromise distance the forces dominating between atoms are
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repulsive forces
attractive forces
Dipole induced dipole force
H-bonding
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Question # 37
In aldehydes and ketones carbon of carbonyl group is;
Choose an answer
sp³ hyhridized
sp² hybridized
sp hybridized
un hybridized
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Question # 38
Steam causes more seers burns than boiling water. It is due to
Choose an answer
Latent heat of fusion
Latent heat of vaporization
Latent heat of sublimation
All of above
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Question # 39
The intramolecular forces in gases are:
Choose an answer
Weak.
Normal.
Very weak.
Strong.
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Question # 40
Which of the following is the element not present in all proteins?
Choose an answer
Carbon
Hydrogen
Nitrogen
Sulphur
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Question # 41
Which of the following liquid has high vapour pressure?
Choose an answer
H
2
O
ether
CH
3
OH
C
2
H
5
OH
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Question # 42
Polymorphism is shown by AgNO3. Which one of the following options is true for AgNO3?
Choose an answer
Orthorhombic and rhombohedral
Cubic and orthorhombic
Cubic and tetragonal
Monoclinic and hexagonal
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Question # 43
The number of molecules in one dm
3
of water is close to:
Choose an answer
6.02/22.4 x10
23
12.04/22.4 x10
23
18/22.4x 10
23
55.6x6.02x10
23
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Question # 44
Compound X & Y give effervesce with Na2CO3, solution. X gives a white ppt with ammonical AgNO3 while Y gives sweet smell compound on heating with alcohol X &Y are
Choose an answer
Formic acid & acetic acid
Acetone & formic acid
Acetaldehy de & acetic acid
Acetic acid & acetone
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Question # 45
The pressure exerted by the vapours in equilibrium with its pure liquid at given temperature is called the
Choose an answer
equilibrium pressure
atmospheric pressure
vapour pressure
external pressure
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Question # 46
Which of the following is a base according to lowery Bronsted concept?
Choose an answer
I-1
HCl
H3O+
NH4+1
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Question # 47
Diamond is a bad conductor because
Choose an answer
it has light structure
it has a high density
there are no free electron present in the crystal of diamond to conduct electricity
it transparent to light
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Question # 48
The movement of gas molecules from a region of high pressure to vacuum is called:
Choose an answer
Evaporation
Effusion
Conduction
Diffusion
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Question # 49
Which of following is oxidation state of oxygen in peroxides?
Choose an answer
-2
1/2
-1
+2
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Question # 50
All of the following substances are crystalline except:
Choose an answer
carbon
ice
plastic
sucrose
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Question # 51
Which of the following molecules has angel of 120°
Choose an answer
BeCl2
BF3
CH4
NH3
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Question # 52
Which of the following are more temperature senesitive
Choose an answer
Liquid crystals
Solid crystals
Ionic stals
None of above
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Question # 53
Which of the followings has electronic configuration of Ar in +3 oxidation state
Choose an answer
Sc
Mn
Ti
Zn
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Question # 54
Which one of the following reaction of carboxylic acid is reversible?
Choose an answer
Esterification
Salt formation
Reaction with PCI5
Reaction with SOCI2
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Question # 55
Which pair of following pair is metalloid?
Choose an answer
Antimony and bismuth
Phosphorous and arsenic
Nitrogen and phosphorous
Arsenic and antimony
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Question # 56
The pressure exerted by gas molecules is due to their
Choose an answer
collisions
densities
masses
kinetic energy
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Question # 57
One of the best applications of Hess's law to calculate the lattice energy of ionic compound is
Choose an answer
Measurement of enthalpy change in a calorimeter
Studying of first law of thermodynamics
Measurement of a heat of formation of a compound
Born-Haber cycle
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Question # 58
When a metal rod is dipped in its one molar ionie solution
Choose an answer
Electricity is produced
Electricity is consumed
Redox reaction occurs
Potential difference is set up
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Question # 59
What types of bonds are broken when water turns into steam on heating?
Choose an answer
covalent
permanent dipole interactions
hydrogen bonds
induced dipole interactions
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Question # 60
The mass of 8.5 dm
3
of oxygen gas at 0.0821 atm and -1°C is
Choose an answer
100 g
10 g
1 g
0.1 g
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Question # 61
Which is not mineral of AI?
Choose an answer
Diaspore
Corrundam
Bauxite
Galena
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