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ECAT Chemistry Online Test MCQs With Answers
Question # 1
On adding sodium nitroprusside ketones give
Choose an answer
Red
Wine red
White
Orange
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Question # 2
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-778.9 KJ
788.0 KJ
-1.9 KJ
+1.9 KJ
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Question # 3
In a lime kiln, to get higher yield of CO
2
, the measure that can be taken is
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To main high temperature
To pump out CO
2
To remove Cao
To add more CaCO
3
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Question # 4
In physical and chemical properties, transition elements show
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Similarities
Dissimilarities
Both of these
Somestimes similarities, sometimes dissimilarities
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Question # 5
______ reacts with alkalis to give hydrogen
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Be
Mg
Ca
None
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Question # 6
Carboxyl compounds have functional group:
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R-C-X
R-CH=O
RCOR
All
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Question # 7
The colour of the transition metal compounds is due to
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p-d transition
d-d transition
s-p transition
None of these
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Question # 8
If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be
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1
4
9
12
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Question # 9
Grignad reagent is reactive due to
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The presence of halogen atom
The presence of Mg atom
The polarity of C - Mg bond
None of above
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Question # 10
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N
2
O
4
is limiting reactant
N
2
H
4
is the limiting reactant
Reactants are completely converted to the products
Reactions is reversible
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Question # 11
The orbital in Rutherford's model is
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Spiral
Circular
Both
None
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Question # 12
Aspirin is
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Acetyl salicylic acid
Phenyl salicylic acid
Salicylic acid
Benzoic acid
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Question # 13
Analytical chemistry is the science of
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Chemical characterization
Physical characterization
Biological characterization
Biochemical characterization
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Question # 14
The colour of transition metal complexes is due to:
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d-d transitions of electorns
Paramagnetic nature of transition
Ionization
Loss of s-electrons
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Question # 15
Which of the following cannot conduct electricity :
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NaCl fused.
NaCl
(aq)
NaCl
(Solid)
Both (b) and (c)
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Question # 16
With the increase in carbon no. the solubility of carboxylic acids
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Increases
Decreases
Remains same
None of these
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Question # 17
During nitration of benzene, the active nitrating agent is
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NO3
NO2+
NO2-
HNO3
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Question # 18
Which of the following equations represents the action of heat on NaHCO
3
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Question # 19
Which one of the following correctly describes the acid properties of phenol
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Stronger than HCI
Stronger than carboxylic acid
An acid stronger than carbonic acid
An acid weaker than carboxylic acid
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Question # 20
The change in concentration of reactant or product per unit time is called :
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Rate constant.
Rate of reaction.
Rate equation.
Rate law.
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Question # 21
Each of the following compounds is effective as a refrigerant. The release of which one of these causes the greatest depletion of the ozone layer
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CCl
2
F
2
CH
3
OCH
3
CH
3
CHF
2
CH
3
CH
2
CH
3
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Question # 22
During electrolysis of KNO
3
, H
2
is evolved
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Anode
Cathode
Both a and b
None
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Question # 23
When phenol is reduced in the presence of Zn dust, we get
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Cyclohexene
Cyclohexane
Benzene
Benzyne
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Question # 24
If the ionic product of a solution is less than the solubility product, the solution is
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Supersaturated
Unsaturated
Ideal
Saturated
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Question # 25
The ionic strength of a solution containing 0.1 mole/kg of KCl and 0.2 mole/kg of CuSO
4
is
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0.3
0.6
0.9
0.2
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Question # 26
pH of water is 7, if 0.01 M NaOH is added, than its pH is
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12
14
zero
10
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Question # 27
When potassium metal is exposed to violet light
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Ejection of electrons takes place
Ejection of some potassium atoms occurs
There is no effect
The absorption of electrons takes place
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Question # 28
Complete combustion of alkane yields
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CO
2
+ H
2
O
CO
2
+ heat
CO + H
2
O heat
CO
2
+ H
2
O + heat
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Question # 29
Hydrolysis of potassium acetate produces
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Acidic solution
Neutral solution
Basic solution
None of these
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Question # 30
Macromolecules are
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organic molecules
High molecular mass molecules
Natural compounds
Rarely occurring molecules
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Question # 31
The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with
Choose an answer
Hund's rule
Markownikov's rule
Pauli's Exclusion principle
Auf ban principle
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