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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Mixture of alcohol and water can be separated by
Choose an answer
Solvent extraction techniques
Crystallization
Precipitation and filtration
Fractional distillation
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Question # 2
Ethyl alcohol may be identified by
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Ring test
Iodoform test
Tollen's test
Bazeyer's test
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Question # 3
For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to
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Hydrolysis
Oxidation
Hydrogenation
Electrolysis
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Question # 4
Which of the following synthetic fertilizer do not make soil acidic
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Urea
Thin urea
Ammonium phosphate
Potassium nitrate
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Question # 5
Aromatic carboxylic acids have carboxyl group attached to group :
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Alkyl group
Aryl group
Phenyl group
Benzyl group
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Question # 6
In the chemical combination of hydrogen and fluorine to form HF:
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Sodium atom donates major share of its electrons.
Hydrogen atom donates the major share of its electrons.
Both the atoms share the electrons equally.
None of above.
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Question # 7
How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH
2
OH
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1
2
3
4
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Question # 8
Number of moles of solute dissolved in 1 Kg of solvent is knowns as
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Molarity
Formality
Molality
Mole fraction
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Question # 9
In a reversible reaction, two substances are in equilibrium. If the concentration of each one is reduced to half, the equilibrium constant will be
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Reduced to half of its original value
Doubled
Same
Reduced to one fourth its original value
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Question # 10
BiCl
3
on hydrolysis forms a white precipitate of
Choose an answer
Bismuthio acid
Bismuth oxychloride
Bismuth pentachloride
Bismuth hydroxide
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Question # 11
Almost forward reaction is complete when value of k
c :
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Neither larger nor very small.
Very small.
Very large.
Negligible.
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Question # 12
A solution of two component is called
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Binary solution
Dilute solution
Original solution
Standard solution
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Question # 13
If 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of NaCl is
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0.1
0.01
0.2
0.0196
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Question # 14
Which of the following particles has longest wavelength, if they have same speed:
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Proton.
Neutron.
Electron.
Positron.
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Question # 15
A solution of NaOH has pH = 13, then concentration of NaOH is
Choose an answer
10
-13
M
10
13
M
10
-1
M
10
+1
M
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Question # 16
Dust particles in smoke is a solution of the type
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Liquid is solute and solid is solvent
Solid is solute and liquid is solvent
Solid is solute and gas is solvent
Gas is solute and solid is solvent
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Question # 17
As the nuclear charge increases, the pull on the electrons is increased and size of an atom:
Choose an answer
Decreases.
Remain same.
Increases.
Is negligible.
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Question # 18
Two moles of acetic acid are heated with P
2
O
5
the product formed is
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2 moles of ethyl alcohol
Formic anhydride
Acetic anhydride
2 moles of methyl cyanide
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Question # 19
The solubility product of Ca(OH)
2
is 6.5 x 10
-6
. The concentration of OH
-
ions is
Choose an answer
1.175 x 10
-2
2.35 x 10
-2
3.25 x 10
-3
3.25 x 10
-4
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Question # 20
The gasoline having octane No. 100 has ______
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More knocking
Less knocking
No knocking
Only knocking
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Question # 21
Ozone hole refers to
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Hole in ozone layers
Reduction in thickness of ozone layer in stratosphere
Reduction of thickness of ozone in troposphere
Increase concentration of ozone
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Question # 22
The clotting time of blood is increased due to the deficiency of
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Vitamin A
Vitamin K
Vitamin D
Vitamin C
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Question # 23
Phenol is also known as
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Acetic acid
Carbolic acid
Tararic acid
Trichloroacetic acid
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Question # 24
Which one of the following particles has amass 1/1836 time, that of hydrogen?
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Neutron.
Proton.
Electron.
Positron.
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Question # 25
Which compound shows hydrogen bonding
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C
2
H
6
C
2
H
5
CI
CH
3
- O - CH
3
C
2
H
5
OH
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Question # 26
The increase in size of the anion is due to:
Choose an answer
Increase in electron-electron repulsion
Increase in valence shell electrons.
Decrease in valence shell electrons.
Both (a) and (b).
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Question # 27
NaBH
4
and LialH
4
are
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Ionic hydrides
Covalent hydrides
Interposal hydrides
Complex hydrides
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Question # 28
The fiber which is made from acrylonitrile as monomer:
Choose an answer
PVC
Rayon Fiber
Acrylic fiber
Polyester fiber
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Question # 29
Which is the used as test for the presence of alkenes
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Reaction of cold dilute alkaline KMnO
4
Combustion
Polymerization
Catalytic hydrogenation
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Question # 30
Baking powder has which one of the following formula
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Na
2
CO
3
Na
2
SO
4
NaHCO
3
K
2
CO
3
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Question # 31
Ethylene decolorizes cold dilute solution of KMnO
4
. This test is known as
Choose an answer
Colouration test
Baeyer's test
Silver mirror test
Ring test
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