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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Which shows maximum catenation property?
Choose an answer
S
Se
Te
O
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Question # 2
Which of the following d-block elements can show the highest oxidation number in its compounds
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Chromium
Copper
Nickel
Manganese
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Question # 3
The raw material to form nylon is
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Adipic acid
Butadiene
Isoprene
Ethylene
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Question # 4
How many isomeric disubtituted products are obtained by the introducing of second group in the ring
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Two
Three
Four
None
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Question # 5
Nitrogen in NH
3
is sp
3
hybridized but the bond angle in NH
3
is 107° and not 109.5° due to
Choose an answer
sp
3
orbital planar
sp
3
orbital trigonal
Repulsion between lone pair and bonded pairs
None of them
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Question # 6
Which is an essential constituent of chlorophyll
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Be
Fe
Mg
Ca
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Question # 7
The bond order of individual C - C bond is benzene is
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One
Two
Between one and two
One and two alternately
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Question # 8
Which of the following decolorized Br
2
-water
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Methane
Ethane
Ethene
Propane
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Question # 9
Water pollution is mainly due to
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Sulphure dioxide
Carbon dioxide
Oxygen
Industrial discharges
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Question # 10
Which one of the following elements occurs free in nature?
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N
P
As
Sb
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Question # 11
Which the increase in carbon number of solubility of an alcohol
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Increases
Decreases
Remains unaffected
None of these
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Question # 12
Which of the following is present in the stings of bees and wasps
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Formic acid
Citric acid
Carbolic acid
Formalin
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Question # 13
Compounds X, Y and Z, all react with PCI
5
to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z
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Question # 14
Photons of yellow colour are ______ energetic than violet colour
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More
Less
Equal
None
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Question # 15
On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives
Choose an answer
Methyl alcohol
Ethyl alcohol
Ethyl hydrogen sulphate
Methyl hydrogen sulphate
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Question # 16
Internal energy of a system is equal to
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Kinetic energy of particles
Potential energy due to binding forces between particles
Sum of kinetic energy plus potential energy of the particles
Heat contents
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Question # 17
Lattice energy of NaCI
Choose an answer
+5000 KJ
-344 KJ
-776 KJ
-411 KJ
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Question # 18
CuSO
4
. 5H
2
O is used to prepare
Choose an answer
Transition complex
Fehling's 'A' sol
Fehling's 'B' sol
Fehling's sol
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Question # 19
Choose an answer
Elimination Esterification
Elimination Isomerisation
Oxidation Exterification
Oxidation Oxidation
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Question # 20
Ecology is a science of environment and deals specially with
Choose an answer
Stratosphere
Biosphere
Lithosphere
Hydrosphere
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Question # 21
Cracking done at low pressure and with a catalyst is called _______ cracking
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Thermal
Catalytic
Steam
None of them
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Question # 22
Lower carboxylic acids are soluble in water due to
Choose an answer
Low molecular weight
Hydrogen bonding
Dissociation into ions
Easy hydrolysis
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Question # 23
Hydrolysis of potassium acetate produces
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Acidic solution
Neutral solution
Basic solution
None of these
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Question # 24
f-Block elements are also called
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Non typical transition elements
Outer transition elements
Normal transition elements
Inner transition elements
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Question # 25
Charge to mass ratio of electron was discovered by:
Choose an answer
Millika.
Rutherford.
J.J. Thomson.
Chadwick.
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Question # 26
Which is the chain isomer of n-pentane
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Isopentane
Neopentene
N-pentene
Isopentene
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Question # 27
The two half cells of a galvanic cell are connected by
Choose an answer
Ammeter
Salt bridge
Hydrogen electrode
Copper electrode
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Question # 28
The formula of secondary alcohol is
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R - OH
R - CH
2
OH
R
2
CHOH
R
3
COH
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Question # 29
The range of visible spectrum is
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300 - 600 nm
600 - 900 nm
400 - 750 nm
100 - 300 nm
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Question # 30
Acetone reacts with HCN to form a cyanohydrin. It is an example of:
Choose an answer
Electrophilic addition
Electrophilic substitution
Nucleophilic addition
Nucleophilic substitution
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Question # 31
The molal depression constant depends upon
Choose an answer
Nature of solute
Nature of solvent
Δ H
solution
Vapour pressure of solution
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