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ECAT Chemistry Online Test MCQs With Answers
Question # 1
The energy absorbed when an electron is added to a gaseous atom to form a gaseous ion is called
Choose an answer
Electron affinity
Ionization energy
Both of these
None of these
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Question # 2
Refrectrometric method is used when
Choose an answer
Reactions involving absorption of I.R. or U. V
Reactions involving change of refractive index
Reactions involving ions
Change of optical activity
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Question # 3
Ethanol containing some methanol is called
Choose an answer
Absolute spirit
Rectified spirit
Power alcohol
Methylated spirit
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Question # 4
Polythene is a polymer of
Choose an answer
Ethane
Ethene
Acetone
Propylene
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Question # 5
A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:
Choose an answer
If the paper covers the funnel up to its circumstances
If the paper has got small sized pores in
If the stem of funnel is large so that it dips in to filtrate
If the paper fits tightly.
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Question # 6
Which of the following factors will favour the reverse reaction in a chemical equilibrium?
Choose an answer
Increase in concentration of one of the reactants
Increase in concentration of one of the products
Removal of one of the products regularly
None of these
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Question # 7
Peptide bond is a key feature in
Choose an answer
Polysaccharide
Proteins
Nucleotide
Vitamins
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Question # 8
The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as
Choose an answer
Saran fibre
Nylon
Polyester
Acetate fibre
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Question # 9
The substance having highest conductivity at room temperature among the following is
Choose an answer
0.1 N HCl
0.1 N NaCl
Graphite
Glass
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Question # 10
The maximum number of electrons in a subshell for which l = 3 is
Choose an answer
14
10
8
4
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Question # 11
Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called,
Choose an answer
Saturated
Un-saturated
Magnetic
Para-magnetic
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Question # 12
Plastics are pollution problem because many plastics:
Choose an answer
Are made from petroleleum
Are very inflammable
Burn to produce toxic funes
Decompose to produce toxic products
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Question # 13
Among the following polymers, the strongest molecular forces are present in
Choose an answer
Elastomers
Fibres
Thermoplactics
Thermosetting polymers
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Question # 14
Which is not true about acetophenone?
Choose an answer
Reacts to form 2,4-dintrophenyl hydrazine
Reacts with Tollen's reagent to form silver mirror
Reacts with I
2
/NaOH to form iodoform
On oxidation with alkaline KMnO
4
followed by hydrolysis gives benzoic acid
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Question # 15
What is the name of the comlex [Ni(CO)
4
]
Choose an answer
Tetracarbonylnickel (o)
Tetracabonylnickel
Tetracabonylnickel (II)
Tetracabonylnickel (IV)
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Question # 16
Formula of chloroform is:
Choose an answer
CH
3
Cl
CCl
4
CH
2
Cl
2
CHCl
3
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Question # 17
Which of the following is fully fluorinated polymer?
Choose an answer
Neoprene
Teflon
Thiokol
PVC
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Question # 18
The mass of one mole of proton is
Choose an answer
1.008 g
0.184 g
1.673 g
1.008 mg
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Question # 19
Li has the lowest reduction potential while the element with highest reduction potential is
Choose an answer
H
F
O
N
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Question # 20
Vinegar made form cane sugar, now a days synthetically contains
Choose an answer
Citric acid
Lactic acid
Acetic acid
Palmitic acid
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Question # 21
Choose an answer
Three times
Six times
Nine times
Two times
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Question # 22
Williamson's synthesis is used to prepare
Choose an answer
Diethylether
Phenolphthalein
Hydrogenation
Bakelite
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Question # 23
Aspirin is
Choose an answer
Acetyl salicylic acid
Phenyl salicylic acid
Salicylic acid
Benzoic acid
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Question # 24
Which one is the major reason for pollution in high cities?
Choose an answer
Fossil fuel
Acid rain
Heat dispersion
None of the above
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Question # 25
Which of the following (1 M) conducts more electricity?
Choose an answer
Sulphuric acid
Boric acid
Nitric acid
Phosphorus acid
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Question # 26
When nitrogen is 5.6 grams in NO
2
. then number of moles of NO
2
is
Choose an answer
0.5
0.4
0.04
0.05
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Question # 27
Indicate the correct statement
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All lanthanidees are present in the same group
All halogens are present in the same period
All the alkali metals are present in the same group
All the noble gases are present int he same period
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Question # 28
Which of the following decolorized Br
2
-water
Choose an answer
Methane
Ethane
Ethene
Propane
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Question # 29
Molecules of High molecular weight usually greater than 10,000 are called:
Choose an answer
Macro molecules
Mega molecules
Poly molecules
Gega molecules
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Question # 30
Which one is primary alcohol?
Choose an answer
Buten-2-ol
Propan-2-ol
Butaon-1-ol
2,3-Dimethylhexane-4-ol
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Question # 31
Which of the following salt is used as purgative
Choose an answer
CaSO
4
MgSO
4
BeSO
4
NaCl
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