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
Tertiary alcohols have alpha bydrogens
Choose an answer
1
Zero
2
3
Previous
Skip
Next
Question # 2
The structure of sodium chloride is
Choose an answer
simple cube
body centered cubic
face centered cubic
depends upon conditions
Previous
Skip
Next
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
Previous
Skip
Next
Question # 4
What forces operate between ethyl group of ethyl alcohol and oxygen of water
Choose an answer
H-bonding
attractive forces
repulsive forces
dipole forces
Previous
Skip
Next
Question # 5
Boiling point of water is higher (100
°C) than that of ethanol (78.5
°C) although both have hydrogen bonding. This is because
Choose an answer
water molecules are closely packed
water is more acidic than ethanol
ethanol is an organic liquid
number of hydrogen bonds are more in H
2
O
Previous
Skip
Next
Question # 6
The partial pressure of gas can be calculated if we know total pressure of mixture and:
Choose an answer
Number of protons
Number of electrons
Number of neutrons
Mole fraction of gases
Previous
Skip
Next
Question # 7
The order of reactivitv of alksI halides towards nucleophile is
Choose an answer
RI>RBr RF>RCI
RF>RCI>RBr>RI
RI>RBr> RCI>RE
RF>RBr>RCI>RI
Previous
Skip
Next
Question # 8
Ethanoic acid reacts with all of these to produce water except
Choose an answer
Ethanol
Sodium
Caustic soda
Sodium hydrogen carbonate
Previous
Skip
Next
Question # 9
The value of the vapour pressure of water at its boiling point at Karachi and Murree is
Choose an answer
same
different
depends upon the environmental conditions in both cities
greater at Murree and less at Karachi
Previous
Skip
Next
Question # 10
K2SO4, and K2Cr2O4, are isomorphous solids and exist in
Choose an answer
cubic form
orthorhombic form
trigonal form
tetragonal
Previous
Skip
Next
Question # 11
choose the temperature among the following at which real gas obeys ideal gas laws when pressure range is appreciable:
Choose an answer
critical temperature
boyle's temperature
inversion temperature
transition temperature
Previous
Skip
Next
Question # 12
Soda lime is often employed to remove both
Choose an answer
H2O and NO2
CO2, and NO2,
H2O and CO2
H2S and CO2
Previous
Skip
Next
Question # 13
The examples of a hexagonal system is
Choose an answer
sugar
graphite(a=b not equal to c) {Alpha =beta. not equal to gamma}
sulphur
diamond
Previous
Skip
Next
Question # 14
Considering the physical properties of the gases, which of the following statements about particles of gas is not true. The particles
Choose an answer
orderly arranged
randomly moving
having wide spaces
causing pressure
Previous
Skip
Next
Question # 15
Which of the following is primary alkyl halide
Choose an answer
IsopropyI halide
Sec-butyl halide
Tert-buryi halide
Neo-pentyl halide
Previous
Skip
Next
Question # 16
Which af the following compound reacts slower than benzene in the electrophilic substitution.
Choose an answer
Phenol
Nitrobenzene
Toluene
Aniline
Previous
Skip
Next
Question # 17
The forces which are present between the ions and the water molecules are known as
Choose an answer
dipole-induced dipole forces
dipole-dipole forces
ion-dipole forces
London dispersion forces
Previous
Skip
Next
Question # 18
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
Previous
Skip
Next
Question # 19
Which compounds is alicyclic in nature?
Choose an answer
Cyclobutane
Iso-bstand
n-Butane
Toluend
Previous
Skip
Next
Question # 20
Which one of following property is not true about alkali metals?
Choose an answer
Strongest bases due to their hydrides
Low ionization energy
Oxidation number more than +1
Form acidic oxides
Previous
Skip
Next
Question # 21
Which of the following alcohols is least reactive with respect to 0-H bond
Choose an answer
CH3OH
CH-CH2-OH
(CH3)2-CH-OH
(CH3)3OH
Previous
Skip
Next
Question # 22
Viscosity of a liquid is measured by
Choose an answer
barometer
thermometer
viscometer
manometer
Previous
Skip
Next
Question # 23
Crystal can be classified in to ......basic crystal habits
Choose an answer
7
4
14
3
Previous
Skip
Next
Question # 24
Vapour pressure of a substance does not depend upon:
Choose an answer
physical state of matter
temperature
intermolecular forces
surface area
Previous
Skip
Next
Question # 25
In the esterification, first attack is due toon carborylic acid
Choose an answer
Hydrogen ion
Alcohols
Water
All
Previous
Skip
Next
Question # 26
The pressure of 5dm
3
gas increase from 250 torr to 500 torr then new volume of gas
Choose an answer
500 cm
3
375 cm
3
2500 cm
3
None of these
Previous
Skip
Next
Question # 27
Which of the following liquid has higher boiling point?
Choose an answer
HCl
HBr
H
2
O
Br
2
Previous
Skip
Next
Question # 28
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
Previous
Skip
Next
Question # 29
The amount of energy released when gaseous ions of opposite charges combine to give one mole of a crystalline ionic compound is called
Choose an answer
bond energy
heat of formation
lattice energy
ionization energy
Previous
Skip
Next
Question # 30
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
Previous
Skip
Next
Question # 31
The elements for which the value of ionization energy is low can
Choose an answer
Gain electrons readily
Lose electron less readily
Gain electrons with difficulty
Lose electron readily
Previous
Skip
Next
Question # 32
The crystal of diamond is
Choose an answer
ionic
molecular
covalent
metallic
Previous
Skip
Next
Question # 33
Which is an intermediate in Svl
Choose an answer
Ethoxide ion
Alkene
Alkyl halide
Carbocation
Previous
Skip
Next
Question # 34
Which of the following are more temperature senesitive
Choose an answer
Liquid crystals
Solid crystals
Ionic stals
None of above
Previous
Skip
Next
Question # 35
Most of the reactions which give stable products are
Choose an answer
Endothermic
Exothermic
Isothermal
Non of these
Previous
Skip
Next
Question # 36
One dm
3
of O
2
at STP has mass
Choose an answer
32 g
16 g
4.438 g
1.4383 g
Previous
Skip
Next
Question # 37
The B.P of H2O at Murree Hills is
Choose an answer
99.8C
98°C
100C°
89°C
Previous
Skip
Next
Question # 38
Stronger the oxidizing agent, higher is
Choose an answer
Redox potential
Standard reduction potential
Reduction potential
Oxidation potemial
Previous
Skip
Next
Question # 39
The elements of group I-A react violently with water and make the solution
Choose an answer
neutral
amphoteric
acidic
alkaline
Previous
Skip
Next
Question # 40
The oxidation of SO2 to SO3 is exothermic reaction. The yield of SO3 will be maximum if
Choose an answer
Temperature is increased and pressure is kept constant
Temperature is reduced and pressure is increased
Both temperature and pressure are increased
Both temperature and pressure are increased
Previous
Skip
Next
Question # 41
Which of the following is more reactive where 0-H bonds break
Choose an answer
P°alcohol
T° alcohol
S°alcohol
Cannot be predicated
Previous
Skip
Next
Question # 42
Which of the following may be called London dispersion forces
Choose an answer
dipole-dipole forces
ion-dipole forces
dipole-induced dipole forces
instantaneous dipole-induced dipole forces
Previous
Skip
Next
Question # 43
The oxidation of 1 - propanol in the presence of H2SO4, +K2Cr207 produces final product
Choose an answer
Acetaldehyde
Propanal
Acetone
Propanoic acic
Previous
Skip
Next
Question # 44
The vapour density of a gas is 11.2.The volume occupied by 11.2 g of this gas at N.T.P is
Choose an answer
22.4 litres
11.2 litres
1 litre
2.24 litres
Previous
Skip
Next
Question # 45
Which order of vapour pressure in the following liquids is correct
Choose an answer
water > ethanol > acetone > ether
ether > acetone > ethanol > water
ether > ethanol > acetone > water
water > ether > acetone > ethanol
Previous
Skip
Next
Question # 46
The crystal system are of
Choose an answer
7 types
10 types
5 types
8 types
Previous
Skip
Next
Question # 47
The highest melting point is observed by
Choose an answer
Butanoic acid
Propanoic acid
Pentanoie acid
HCI
Previous
Skip
Next
Question # 48
Evaporation causes
Choose an answer
High temperature
High pressure
Cooling
Vapour
Previous
Skip
Next
Question # 49
The existing property of an element in to more than are crystalline state is termed as:
Choose an answer
isomorphism
polymorphism
isotropy
allotropy
Previous
Skip
Next
Question # 50
Which will not react with phenol
Choose an answer
NaOH
Br2
KMn04/OH-
Na
Previous
Skip
Next
Question # 51
The hexagonal closed packing is associated with
Choose an answer
Ag, Cu, Au
Zn, Cd, Hg
Li, Na, K
NaCl, KBr
Previous
Skip
Next
Question # 52
Total number of valence electrons in CH4
Choose an answer
8
9
10
12
Previous
Skip
Next
Question # 53
Coinage metals Cu, Ag and Au are the least reactive because they have
Choose an answer
Negative reduction potential
Negative oxidation potential
Positive reduction potential
Positive oxidation potential
Previous
Skip
Next
Question # 54
The specifie substance (metabolite) that fits on the enzyme surface and is converted to products is called
Choose an answer
Co-factor
Isoenzyme
Prosthetic group
Substrate
Previous
Skip
Next
Question # 55
Gases of air, always remain in random motion and do not settle due to:
Choose an answer
Difference of molecules masses of air gases.
Difference in partial pressure of gas molecules.
Unequal number of different gas molecules.
Elastic collision of gas molecules.
Previous
Skip
Next
Question # 56
Which one of the following is an appropriate indication of positive iodoform test?
Choose an answer
Formation of H2O
Brick red precipitate
Release of H2 gas
Yellow precipitate
Previous
Skip
Next
Question # 57
The relationship which describes the variation of vapour pressure with temperature is called
Choose an answer
Hess's law
Arrhenius equation
Kirchhoff's law
Clausius-Clapeyron equation
Previous
Skip
Next
Question # 58
Which element differs from rest of elements of its group?
Choose an answer
Ba
Mg
Ca
Be
Previous
Skip
Next
Question # 59
In which of the following processes the liquids are made to boil at low temperature
Choose an answer
Vacuum distillation
Destructive distillation
Distillation
Vacuum destructive distillation
Previous
Skip
Next
Question # 60
Amorphous solids:
Choose an answer
have sharp melting point
undergo clean cleavage when cut with knife
have prefect arrangement of atoms
can possesses small regions of orderly arrangement
Previous
Skip
Next
Question # 61
The gases law describe the ______ Behaviour of gases
Choose an answer
Variable
Constant
Uniform
Best
Previous
Skip
Next
Back