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MDCAT Chemistry Online Test MCQs With Answers
Question # 1
Formamide is formed by the reaction of which acid with ammonia
Choose an answer
Oualic acid
Formic acid
Ethanoic acid
Propanoic acid
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Question # 2
Which of the following is electrophile for alkylation?
Choose an answer
NO+2
SO3
R+
Both a & b
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Question # 3
The structural isomerism arises due to the difference in the
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Number of atoms in the molecule
Arrangements of atoms in the molecule
Number as well as arrangement of atoms in the molecule
Spatial arrangement of atoms
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Question # 4
One molecule of gas is approximately Distance______ times its own diameter from its neighbour at room temperature.
Choose an answer
30
3000
3
300
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Question # 5
The angle between the unhybridized 2pz orbital and the three sp2 hybrid orbitals in ethene is
Choose an answer
180°
120°
90°
60°
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Question # 6
Total number of possible chain and positional isomers of butyl alcohol among alcohols are
Choose an answer
Four
Five
Two
Six
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Question # 7
If temperature is 73K and volume is 146 cm3 then calculate the value of K=V/T
Choose an answer
5
4
3
2
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Question # 8
Ethyl and methyl groups are equidistant in a chain, the preference is given to?
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Ethyl
methyl
both ethyl and methyl
methyl mostly
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Question # 9
Correct relationship b/w Kc and Kp can be written as
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Kp=, Kc(R)∆n
Kc=Kp (RT)∆n
Kp.= Kc.(RT)∆n
Kp=Kc (R/N)∆n
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Question # 10
Molar volume of CO
2
is maximum at
Choose an answer
NTP
0°C and 2.0 atm
127°C and 1 atm
273°C and 2.0 atm
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Question # 11
During space flights, astronauts ohlained water from
Choose an answer
Nickel cadmium cells
Lead accumulator
Fuel Cell
Alkaline battery
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Question # 12
Substance that does not show the process of sublimation is
Choose an answer
K2Cr2O7
iodine
naphthalene
NH4CI
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Question # 13
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 # 14
As gases can adopt the shape of the container. Therefore gases have:
Choose an answer
different shapes
fixed shapes
no fixed shapes
definite shapes
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Question # 15
Nitro alkanes exhibit the:
Choose an answer
Chain isomerism
Positional isomerism
Functional group
Metamerism
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Question # 16
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
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Question # 17
How many allotropic forms are present in carbon?
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Two
Four
Three
Five
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Question # 18
Propanone does not undergo
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Oxime formation
Reduction of Fehling solution
Hydrazone formation with hydrazine
Reaction with HCN
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Question # 19
Temperature at which molecular motion ceases is called
Choose an answer
Absolute zero
Absolute temperature
Critical temperature
Difficult to predict
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Question # 20
Which one of the following is not associated with SN2 mechanism
Choose an answer
100 % inversion of configuration
Tertiar alkyI halides
2nd order kinetics
Change of hy bridization from sp³ to sp² in transition state
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Question # 21
Which one of the following alcohol is indicated by formation of yellow crystals in lodoform tesr?
Choose an answer
Methanol
Ethanol
Butanol
Propanol
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Question # 22
What is the formula of clay?
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Asbestos
Talc
H2Al2(SiO4)2.H2O
Na2SiO3
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Question # 23
Gram atoms of hydrogen in 5.5 g H2
Choose an answer
5.50
2.25
5.45
2.20
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Question # 24
The rate of diffusion of two gases are inverselly proportional to the square roots of their densities or molecular weights, is a statement of
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Charle's Law
Boyle's Law
Graham's Law
Dalton's Law
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Question # 25
Energy required to remove electron from an atom
Choose an answer
Ionization potential
Electronegativity
Electropositivity
Electron affinity
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Question # 26
Which of the following statement about graphite is not true?
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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.
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Question # 27
What is the reason of ionic solids for not conducting electricity?
Choose an answer
free electrons are less
ions don't have translatory mention.
ions don't have translatory mention
the coordination number of the ion is very high.
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Question # 28
Which of the following is not molecular crystal
Choose an answer
Sugar
Iodine
Ice
Graphite
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Question # 29
At higher temperature what is true for gases
Choose an answer
pressure is decreased
volume is decreased
number of moles are decreased
KE is increased
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Question # 30
Dipole-dipole interaction are present in the
Choose an answer
atoms of the He gas
molecules of CCl4
molecules of solid iodine
molecules of :NH3
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Question # 31
An acid that exists as a cyclic dimer in benzene and shows a molar mass of 120g/mol is
Choose an answer
СН3СOOH
HCOOH
CI2CHCOOH
Сl3CCOOH
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Question # 32
Total number of valence electrons in phosphonium ion (PH4-) is
Choose an answer
8
9
12
10
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Question # 33
Which of the following alcohol is more soluble in H2O
Choose an answer
Propanol
Butanol
Pentanol
Hexanol
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Question # 34
Rte of evaporation of petrol is greater than that of water at room temperature. This is due to the reason that:
Choose an answer
petrol is an organic compound
water molecules have small size
petrol molecules do not have
petrol molecules have greater size
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Question # 35
At which oxidation state Cu achieves electronic configuration of Zn+2
Choose an answer
0
+2
+1
+3
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Question # 36
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 # 37
The common oxidation number of halogens is
Choose an answer
-1
+1
-2
0
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Question # 38
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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Question # 39
Amorphous substance show
(i) Short and long range order
(ii) Short range order
(iii) Long range order
(iv) Have no sharp melting point
Choose an answer
(i) and (ii) are correct
(ii) and (iv) are correct
(ii) (iii) and (iv) are correct
(i) and (iv) are correct
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Question # 40
According to Boyle's law, which parameters give a straight line parallel to x-axis, when we plot a graph between:
Choose an answer
V and T
P and V
P and 1/V
P and PV
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Question # 41
The number of unpaired electrons present in Fe ions is
Choose an answer
1
2
5
0
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Question # 42
Which of the folowing compound is expected to be colored
Choose an answer
Na2SO4
ZnCl2
MgF
2
CuF
2
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Question # 43
What is true for a molecule with standard geometry
Choose an answer
It lacks a Ip
It can't be a donor
It can be an acceptor
All
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Question # 44
2,4,6-Trinitrophenol is commonly called as
Choose an answer
Phthalic acid
Tartaric acid
Malonic acid
Picric acid
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Question # 45
Oils and fats belong to the class of
Choose an answer
Alcohols
Hydrocarbons
Acids
Esters
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Question # 46
The transition temperature of tin is
Choose an answer
95.5 C°
13.2 C°
13.2°C
128.5°
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Question # 47
The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute
Choose an answer
Oxidation
reduction
Redox reaction
electrolysis
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Question # 48
For N2: +3H2<--------> 2NH3, if Kc is 1 than value of Kp at 273K would be
Choose an answer
1/22.414
1/(22.414)2
22.414
11.207
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Question # 49
In which of the following molecules strongest hydrogen bond is shown
Choose an answer
water
ammonia
hydrogen fluoride
hydrogen sulphide
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Question # 50
Which of the following is not the application of plasma
Choose an answer
Fluorescent light bulb
Removal of hazardous chemical
Neon signs
Corrosion effective
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Question # 51
The oxidation state of transition elements is usually
Choose an answer
Variable
Single
Constant
Infinite
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Question # 52
Which of the following element will have strongest van der Waal force of attraction between its molecules?
Choose an answer
nitrogen
hydrogen
oxygen
chlorine
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Question # 53
The polarizabilities of elements mostly increase down the group due to the reason that
Choose an answer
the atomic numbers increase
number of protons increase
number of shells increase along with increase of shielding effect
the behaviour of the elements remain the same
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Question # 54
Slight oxidation of primary alcohol eives
Choose an answer
Ketone
Aldehyde
-Organic acid
An ester
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Question # 55
The measurement of enthalpy change at standard conditions means that we should manage the measurement at
Choose an answer
24°C at 1 atm
25°C at 1 atm
0C° at 1 atm
100C° 1 atm
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Question # 56
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
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Question # 57
Correct order for the reactivity ofalkyl halide in S, reactions
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R-I>R-F>R-CI
R-F>R-CI>R-I
R-I>R-CI>R-F
R-CI>R-I>R-F
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Question # 58
The solubility product of AgCl is
2.0 x 10(-10) mol2 dm(-6). The maximum concentration Ag+ ions in the solution is:
Choose an answer
1.41 × 10(-5) mol. dm(-3)
1.41 × 10(-10) mol. dm(-3)
2.0 × 10(-10) mol. dm(-3)
4.0 × 10(-20) mol. dm(-3)
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Question # 59
Which of the following best describes the shape and polarity of the carbon disulphide molecule?
Choose an answer
Bent and polar
Linear and non-polar
Pyramidal and polar
Bent and non-polar
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Question # 60
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 # 61
A doubly bonded carbon is
Choose an answer
cannot be sp2 hybridized
can be sp hybridized
can attach with three carbons
can attach with three hydrogens
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