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MDCAT Chemistry Online Test MCQs With Answers
Question # 1
Which of the following is exact relationship between °F and C°
Choose an answer
°F= 5/9[°C-32]
°C = 5/9 [°F]+32
°F = 9/5°C+32
All
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Question # 2
Equal masses of methane and oxygen are mixed in an empty container at 25°C The fraction of total pressure exerted by oxygen is
Choose an answer
1/3
1/9
8/9
16/17
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Question # 3
Evaporation of liquid takes place at every temperature. What when temperature becomes constant?
Choose an answer
the rate of condensation is greater than teh rate of condensation
it depends upon the nature of the liquid
rate of evaporation is greater than the rate of condensation
the rate of condensation and evaporation become equal
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Question # 4
Crystals can be classified into
Choose an answer
7 crystal systems
4 crystal systems
3 crystal systems
14 crystal systems
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Question # 5
In the reaction A+B→ Products, if B is taken in excess, then it is an example of
Choose an answer
Second order reaction
zero order reaction
Pseudo first order reaction
first order reaction
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Question # 6
In which molecule. all atoms are coplanar?
Choose an answer
CH4
BF3
NH3
PH3
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Question # 7
Variable Oxidation state of is related to transition elements
Choose an answer
empty d-subshells
Completely filled
Partially filled d-subshell
d-d transition
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Question # 8
All of the following substances are crystalline except:
Choose an answer
carbon
ice
plastic
sucrose
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Question # 9
Which one among the following is not a good leaving group
Choose an answer
HSO4-
CI-
OH-
Br-
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Question # 10
The value of van der Waal s constant a for gases CO
2
, N
2
, and SO
2
, are 3.59 ,1.39, 1.36, and 6.17 atm dm
6
mol
-2
respectively the gas which can be most easily liquefied is
Choose an answer
CO
2
O
2
N
2
SO
2
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Question # 11
The molecular speed Crms of gas is
Choose an answer
Independent of temperature
Proportional to the absolute temperature
Proportional to the square root of absolute temperature
Proportional to the square of absolute temperature
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Question # 12
Slight oxidation of primary alcohol eives
Choose an answer
Ketone
Aldehyde
-Organic acid
An ester
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Question # 13
The temperature below which a gas does not exist is called its
Choose an answer
Inversion temperature
Critical temperature
Neutral temperature
Curie point
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Question # 14
The value of R in term of dm
3
torr k
-1
mol
-1
Choose an answer
62400
62.4
8.313
0.0821
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Question # 15
2-propanol on oxidation yield
Choose an answer
Propionaldehyde
Propanone
Propanal
Butanal
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Question # 16
Zn has
Choose an answer
Zero unpaired electrons
Three unpaired electrons
Five unpaired electrons
One paired electrons
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Question # 17
The B.P. of compound is mostly raised by
Choose an answer
dipole-induced dipole interactions
london dispersion forces
intramolecular H-bonding
intermolecular H-bonding
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Question # 18
At higher temperature isotherm moves away from y-axis because of increase in
Choose an answer
Pressure
Number of moles
Volume
Mass
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Question # 19
One of the following metals is the most reactive and form super oxide. Indicate that
Choose an answer
Mg
K
Be
Li
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Question # 20
Which one of the following is not a form of chemical bonding?
Choose an answer
covalent bonding
hydrogen bonding
ionic bonding
metallic bonding
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Question # 21
The existence of an element in more than one form is called
Choose an answer
allotropy
isomorphism
polymorphism
isotropy
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Question # 22
The largest number of molecules are present in
Choose an answer
3.6 g of H2O
4.6 g of C2H5OH
2.8 g of CO
5.4 g of N2O5
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Question # 23
Which of the following compound is least reactive
Choose an answer
HCHO
CH3CHO
CH3COCH3
C6H5CHO
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Question # 24
The attractive forces which exist between ionic compounds and water molecules are
Choose an answer
dipole-dipole forces
ion diopole forces
istantaneous dipole-induced dipole forces
dipole-induced dipole forces
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Question # 25
If the distance between Na
+
and CI
-
ions in sodium chloride crystal is X pm,the length of the edge of the unit cell is
Choose an answer
4X om
X/4 pm
X/2 pm
2X pm
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Question # 26
Hydrogen bonding is extensively present in proteins which form the spiral. The hydrogen bond being produced is between
Choose an answer
nitrogen and hydrogen atom
oxygen and hydrogen atom
carbon and hydrogen atom
oxygen and carbon atom
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Question # 27
What is the formula of magnesite?
Choose an answer
MgSO4. 7H2O
MgCO3
CaCO3
PbS
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Question # 28
Which of the following statements is not correct about galvanic cell?
Choose an answer
Anode is negatively charged
Cathode is positively charged
Reduction occurs at anode
Reduction occurs at cathode
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Question # 29
Final product of hydrolysis of nitrile is
Choose an answer
Ketone
Alcohol
Aldehyde
Carboxylic acid
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Question # 30
Neutralization of acid-base is
Choose an answer
Spontaneous
Exothermic
Non spontaneous
Both "a" and "c
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Question # 31
.The number of moles in 2.24 dm3 of H2 gas at STP is:
Choose an answer
1
0.1
10
0.01
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Question # 32
When light is exposed to a typical transition element, then electrons jumps from low orbitals to higher orbitals in
Choose an answer
f-orbitals
s-orbitals
p-orbitals
d-orbitals
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Question # 33
Evaporation occurs at all temperatures and is effected by
Choose an answer
surface area
temperature
intermolecular forces
all of these
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Question # 34
Molten lead and iead (II) bromide both conduct electricity. Which one of the following statements relating to this is true?
Choose an answer
Both undergo chemical change when they conduct
Both conduct by the movement of charge particles
Both will also conduct in the solid state
Both contain mobile electrons
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Question # 35
The rate of diffusion of a gas of molar mass 72 as compared to H
2
will be:
Choose an answer
Same
6 times
1.4 times
1/6 times
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Question # 36
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
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Question # 37
Dipole-induced dipole forces are also called
Choose an answer
dipole-dipole forces
ion-dipole forces
Debye forces
London-dispersion forces
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Question # 38
One of the following is a ionic solid. Which is that?
Choose an answer
Fe
KBr
Diamond
Cr
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Question # 39
Amorphous means
Choose an answer
arranged
ordered
shaped
shapeles (no arrangements)
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Question # 40
The molecule of CO
2
in dry ice form are the:
Choose an answer
ionic crystals
covalent crystals
molecular crystals
any type of crystals
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Question # 41
Geometry of simple molecule with sp2 hybridization
Choose an answer
Triangular planar
Trigonal
Square planner
Pyramidal
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Question # 42
Which is not true in case of an ideal gas?
Choose an answer
It cannot be converted into a liquid
There is no interaction between the molecules
All molecules of the gas move with same speed
At a given temperature P'V is proportional to the amount of the gas
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Question # 43
d-d transition cannot be observed in
Choose an answer
Cr
Cu
Mn
Zn
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Question # 44
During space flights, astronauts ohlained water from
Choose an answer
Nickel cadmium cells
Lead accumulator
Fuel Cell
Alkaline battery
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Question # 45
The highest temperature above which a gas cannot be liquified no matter how much pressure is applied, is called as
Choose an answer
critical temperature
absolute zero
liquefaction temperature
boiling point
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Question # 46
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
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Question # 47
Elements of II-A group are called alkaline earth metals due to the reason that
Choose an answer
they occur in earth only
they form divalent cations only
they have ns2 electronic configuration
their oxides and hydroxides are alkaline in nature and metals are present in earth crust
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Question # 48
What is the weight of 10 dm
3
of CO
2
at 27
°C and 2 atm?
Choose an answer
89.3 g
56.1 g
125 g
127 g
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Question # 49
Which of the following is not an electrophilic substitutional reaction of benzene?
Choose an answer
Free radical chlorination of benzene
Friedel Craft alkylation
Sulphonation
Nitration
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Question # 50
Oils and fats belong to the class of
Choose an answer
Alcohols
Hydrocarbons
Acids
Esters
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Question # 51
Which of the following reactions are usually slow?
Choose an answer
Neutralization of acids and bases
Displacement Reactions
Organic substitution reaction
Free radical reactions
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Question # 52
Alcohol is less acidie than phenol due to
Choose an answer
higher ka value
Instability of alkoxide ion
stability of carbocation
Stability of phenol
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Question # 53
The reaction C2H5CI + aqueous KOH---------C2H5OH+ KCI is
Choose an answer
Electrophilic addition
Nucleophilic addition
Electrophilic substitution
Nucleophilic substitution
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Question # 54
A basic buffer solution can be prepared by mixing?
Choose an answer
Weak acid and its salt with strong base
Weak base and its salt with strong acid
Strong acid and its salt with weak base
Strong base and its salt with strong acid
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Question # 55
Enthalpy of a reaction can be measured by
Choose an answer
Glass calorimeter
Barometer
Manometer
Thermometer
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Question # 56
Which gas diffuses more rapidly?
Choose an answer
O
2
SO
3
NH
3
H
2
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Question # 57
The bonding which occurs among polar covalent molecules containing H and one of the small electronegative element such as O, F or N is called
Choose an answer
bridge bonding
metallic bonding
hydrogen bonding
Ionic bonding
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Question # 58
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 # 59
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
reduced to 1/4
be double
increases four times
remains unchanged
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Question # 60
Catalyst used for ammonia synthesis is
Choose an answer
Cu
Co
Zn
Fe
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Question # 61
All the Hydrolytic reactions are
Choose an answer
First order
Second order
Third order
pseudo-first order
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