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ECAT Chemistry Online Test MCQs With Answers
Question # 1
CaC
2
on hydrolysis form
Choose an answer
CH
4
C
2
H
4
C
2
H
2
C
6
H
6
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Question # 2
Alkanes may be prepared by the reaction of alkyl halides with
Choose an answer
Alcohol
Carboxylic acid
Grignard reagents
None of these
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Question # 3
1 erg of energy corresponds to
Choose an answer
6.02 x 10
23
J/mol
6.02 x 10
16
J/mol
1 erg/mol
10
-7
J/mol
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Question # 4
A compound used as eye wash:
Choose an answer
Borax
Boric acid
Metabolic acid
Pyroboric acid
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Question # 5
White P when boiled with strong solution of caustic soda produces
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Phosphine
Posh acid
Phosphorous acid
None
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Question # 6
Give IUPAC name fo Acetone
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Ethanal
Propanone
Butanone
Propanal
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Question # 7
An aqueous solution is neutral when its
Choose an answer
pH = 14
pH = zero
pH = 7
Kw = 10
-7
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Question # 8
Which of the following has unchanged valency?
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H
Na
Fe
Oxygen
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Question # 9
The amount of solute present in the given amount of solvent is called
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Molarity
Molality
Concentration
Solubility
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Question # 10
There are 20 amino acids found in protein which is not the property of these amino acids
Choose an answer
They are all
α
-amino acids
They are all optically active
They have high decomposition point
They are water soluble
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Question # 11
Choose an answer
Zero
1
2
1.5
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Question # 12
The percentage of nitrogen in ammonia is
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80%
82%
90%
50%
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Question # 13
When elements of group I react with the elements of group VIA theory form
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Ionic bond
Covalent bond
Polar bond
None
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Question # 14
Whenever a week base is dissolved in water, it give its conjugate acid. similarly a weak acid in water produces its conjugate base. This conjugate acid-base pair concept is stated by
Choose an answer
Law of mass action
Le-charlier's principle
Common ion effect
Lowery Bronsted concept
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Question # 15
Which of the following is not aromatic hydrogencarbon
Choose an answer
Benzene
Naphthalene
Toluene
Cyclohexene
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Question # 16
Which element forms an iron with charge
3+
?
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Berylium
Aluminium
Carbon
Silicon
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Question # 17
Amino acids are buildng blocks of:
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protein
Carbohydrates
Lipids
fats
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Question # 18
Direct conversion of solid into vapors is called :
Choose an answer
Crystallization
Sublimation
Obligation
Vaporization.
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Question # 19
Tincal is a mineral of:
Choose an answer
Al
B
Si
C
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Question # 20
Which of the following is a polar molecules
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Carbon dioxide
Carbon tetrachloride
Methanol
Ethane
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Question # 21
Which of the following molecules have multiple bonds
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CH
4
C
2
H
4
C
2
H
6
CCI
4
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Question # 22
Which one of the following gases is used for artificial ripening of fruits
Choose an answer
Ethene
Ethane
Methane
Propane
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Question # 23
Transition metals mostly are
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Diamagnetic
Paramagnetic
Neither diamagnetic nor paramagnetic
Both diamagnetic and paramagnetic
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Question # 24
Density of aluminium is (g cm
-3
):
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B
Al
Si
Ge
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Question # 25
An alkynes having Carbon count of 20 is
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gas
liquid
Solid
None
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Question # 26
Choose an answer
At equilibrium there is no further change in the concentration of Hl
At equilibrium concentration of l
2
remains constant
At equilibrium concentration of H
2
remains unaltered
At equilibrium the rate of formation of Hl is equal to the rate of decomposition of Hl
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Question # 27
K
a
value of HF acid is 6.7 x 10
-15
the acid is a
Choose an answer
Weak acid
Moderately strong acid
Strong acid
Very weak acid
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Question # 28
Acetic Acid is obtained from:
Choose an answer
Red out
Vinegar
Butter
Milk
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Question # 29
Each molecule of haemoglobin is 68000 times heavier than one atom of
Choose an answer
C
H
N
O
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Question # 30
Choose an answer
Addition Elimination
Addition Reduction
Elimination Reduction
Substitution Elimination
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Question # 31
General formula of alcohol is:
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ROH
Ar-OH
R-O-R
Ph-OH
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