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
ECAT Chemistry Online Test MCQs With Answers
Question # 1
Choose an answer
2-chlorobutanal
alfa-chlorobutanal
2-chlorobutyraldehyde
alfa- chlorobutyraldehyde
Previous
Skip
Next
Question # 2
Choose an answer
2-bromonitrobenzene
2-nitrobromobenzene
1-bromonitrobenzene
1-nitrobromobenzene
Previous
Skip
Next
Question # 3
Which inorganic precipitate acts as semipermeable membrane?
Choose an answer
Calcium sulphate
Barium oxalate
Nickel phosphate
Copper ferrocyanide
Previous
Skip
Next
Question # 4
In the reaction K
2
Cr
2
O
7
+ HCl + CrCl
3
+ Cl
2
+ H
2
O the element which is reduced is
Choose an answer
K
Cl
Cr
H
Previous
Skip
Next
Question # 5
Which of the following statements is no correct regarding bonding molecular orbitals?
Choose an answer
Bonding molecular orbitals possess ls energy than atomic orbitals from which they are formed.
Bonding molecular orbitals have low electron density between the two nuclei.
Every electron in bonding molecular orbitals contributes to the attraction b.w atoms.
Bonding molecular orbitals are formed when the electron waves undergo constructive interference.
Previous
Skip
Next
Question # 6
Major food factors are:
Choose an answer
Fats and oils
Carbohydrates
Protiens
All of these
Previous
Skip
Next
Question # 7
Activation energy is the difference of energy between the energy of the reactant and
Choose an answer
The product
The activated complex
Both a and b
None of these
Previous
Skip
Next
Question # 8
Which one of the following is a colligative property?
Choose an answer
Surface tension
Osmotic pressure
Viscosity
Refractive index
Previous
Skip
Next
Question # 9
Which of the following is not isoelectronic?
Choose an answer
Na
+
Mg
2+
O
2-
Cl
-
Previous
Skip
Next
Question # 10
The unit of rate constant k is the same as that of the rate of reaction in
Choose an answer
First order reaction
Second order reaction
Third order reaction
Zero order reaction
Previous
Skip
Next
Question # 11
The bond order in No is 2.5 while that in NO
+
is 3.Which of the following statements is true for these two species?
Choose an answer
Bond length in NO
+
is greater than in NO
Bond length in unpredictable
Bond length in NO
+
is equal to that in NO
Bond length in NO is greater than in NO
+
Previous
Skip
Next
Question # 12
Choose an answer
A strong reducing agent
A strong oxidising agent
Better oxidising agent than hydrogen
Less reducing agent than hydrogen
Previous
Skip
Next
Question # 13
During dehydration of alcohols to alkenes by heating with conc. H
2
SO
4
, the initial step is
Choose an answer
Formation of an ester
Protonation of alcohol molecule
Formation of carbocation
Elimination of water
Previous
Skip
Next
Question # 14
Which of the following is not fatty acid?
Choose an answer
Propanoic acid
Acetic acid
Phthalic acid
Butanoic acid
Previous
Skip
Next
Question # 15
Hydrolysis of ethyl-acetate (ester) has order of reaction :
Choose an answer
3
2
1
1
Previous
Skip
Next
Question # 16
What is the packet of energy called?
Choose an answer
Electron
Photon
Positron
Proton
Previous
Skip
Next
Question # 17
Which is liquid among the following alkenes?
Choose an answer
Ethane
Propene
Butene
Pentene
Previous
Skip
Next
Question # 18
Number of elements present in 5th period is
Choose an answer
8
18
32
24
Previous
Skip
Next
Question # 19
The order of reactivity for a given halogen in Grignard's reagent is:
Choose an answer
CH
3
X > C
2
H
5
X > C
3
H
4
X > C
4
H
4
X
C
2
H
5
X > C
3
H
7
X > C
4
H
5
X > CH
4
X
C
3
H
7
X > C
4
H
7
X > CH
3
X > C
2
H
5
X
C
4
H
4
X > C
3
H
7
X > C
2
H
5
X > CH
4
X
Previous
Skip
Next
Question # 20
Subsidiary quantum number specifies
Choose an answer
size of orbital
shape of orbital
orientations of orbitals
Nuclear stability
Previous
Skip
Next
Question # 21
The rate of reaction b/w two specific time intervals is called :
Choose an answer
Instantaneous rate of reaction.
Average rate of reaction.
Rate of a reaction.
Minimum rate of a reaction.
Previous
Skip
Next
Question # 22
Which substances have
Δ
H =
Δ
E
Choose an answer
Solids
Liquids
Gases
Liquids and solids
Previous
Skip
Next
Question # 23
One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks
Choose an answer
Blow air
Add Na
2
CO
3
Use a specially made sorbent having flouring trapped in it
Use a sorbent having Al
2
O
3
trapped in it
Previous
Skip
Next
Question # 24
The number of electrons in the M shell of the element with atomic number 24 is
Choose an answer
24
12
13
8
Previous
Skip
Next
Question # 25
The experimental evidences for the existence of atomic nucleus comes from:
Choose an answer
Line spectrum of hydrogen.
Magnetic bonding of cathode rays.
Millikan oil drop experiment.
Scattering of alpha particles by thin metal foil.
Previous
Skip
Next
Question # 26
Given date
(i) heat of neutralization of HCl and NaOH is -57.3 KJ mole
-1
(ii) heat of neutralization of CH
3
COOH with NaOH is 55.2 KJ mole
-1
The enthalpy of ionization of CH
3
COOH is a determined according to Hess's law by
Choose an answer
Adding i and ii
Dividing i by ii
Subtracting i from ii
Subtracting ii from i
Previous
Skip
Next
Question # 27
The tip of funnel should be 1 or 2cm larger than the circle of the
Choose an answer
Beaker
Solid
Filter paper
Liquid
Previous
Skip
Next
Question # 28
The electrolysis of CuSO
4
aqueous solution using copper as cathode as well an anode the substance which deposits at cathode is
Choose an answer
H
2
SO
4
Oxygen
Copper
Hydrogen
Previous
Skip
Next
Question # 29
Zn does not displace Mg from MgSO
4
solution because
Choose an answer
Zn is more electropositive than Mg
Zn is below Mg in electropositive series
Zn is above Mg in electrochemical series
Zn is trivalent Mg is divalent
Previous
Skip
Next
Question # 30
Thre rate of S
N
2 reaction depends upon the
Choose an answer
Concentration of alkyl halides
Concentration of nucleophile
Concentration of alkyl halides and nucleophile
None of the above
Previous
Skip
Next
Question # 31
Which is a reagent for Lucas test
Choose an answer
ZnCl
2
+ Conc. HCl
Zn
Na
Br
Previous
Skip
Next
Back