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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Number of neutrons in heavy hydrogen atom is
Choose an answer
0
1
2
3
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Question # 2
Chloroflurocarbon releases a chemical harmful to ozone
Choose an answer
Fluorine
Chlorine
Nitrogen peroxide
Sulphure dioxdie
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Question # 3
Elements in the same family have
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Same atomic number
Molecular wt same
Same chemical properties
Same electronic configuration
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Question # 4
The reference electrode is made by using
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ZnCl
2
CuSO
4
HgCl
2
Hg
2
Cl
2
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Question # 5
Lithium reacts with air to form
Choose an answer
Peroxide
Normal oxide
Superoxide
None of these
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Question # 6
Enzymes are catalysts which contain other than carbon and hydrogen one other element
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Oxygen
Sulphur
Phosphorus
Iodine
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Question # 7
Which one of the following has continuous solubility curve
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NH
4
NO
3
CaCI
CaCI
2
. 6H
2
O
Na
2
SO
4
. 10H
2
O
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Question # 8
Red P can be obtained form white P by
Choose an answer
Heating it with a catalyst in an inert atmosphere
Distilling it in an inert atmosphere
Dissolving it in CS
2
and crysllizing
Melting it ad pouring the liquid into water
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Question # 9
How many g of dibasic acid (mol. wt. 200) should be present in 100 ml of the aqueous solution to give 0.1 Normality?
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1 g
2 g
10 g
20 g
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Question # 10
During oxidation in k
2
Cr
2
O
7, Cr VI changes to :
Choose an answer
I
II
III
IV
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Question # 11
The reaction between fat and NaOH is called
Choose an answer
Esterification
Hydrogenolysis
Fermentation
Saponification
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Question # 12
In alkynes the bonds between carbon atoms are
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All sigma bonds
All pi(
π
) bonds
One is sigma and two are
π
(pi) bonds
One is
π
(pi) and two are sigma bonds
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Question # 13
For the representative elements from left to right across a period in the periodic table, the electron effinity of the atom generally
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Increases
Remains constant
Decreases
Not clear
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Question # 14
The classify the elements, Newland gave the idea of
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Octaves
Triads
Atomic volume
Atomic mass
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Question # 15
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 # 16
Grignard's reagent is
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Alkyl halide
Magnesium halide
Alkyl magnesium halide
Ethereal solution of an alkyl halide
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Question # 17
When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product
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Na
2
CO
3
NaHCO
3
Ca(OH)
2
CaCO
3
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Question # 18
Electrons in degenerate orbitals are placed in separate orbitals with same spin according to
Choose an answer
Hund's rule
Pauli exclusion principle
Aufbau principle
Mosley's law
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Question # 19
Pb has inert pair of electrons:
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One
Two
Three
Four
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Question # 20
The sum of mole percent of all the components of solution is always equal to :
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Less than 100
One
100
10
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Question # 21
The formation of compounds like PF
5
, BCI
3
, SF
6
indicates that
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These halides are ionic
These halides are covalent
They are Lewis acids
Octet rule not obeyed so the rule is not universal
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Question # 22
C
6
H
12
O
6
is molecualr formula of:
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Glucose
Dextrose
Fructose
All of these
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Question # 23
Which of the following pair of atomic numbers represents s-block elements?
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7, 15
6, 12
9, 17
3, 20
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Question # 24
The boiling point of heavy water is
Choose an answer
108
°C
101.4
°C
99
°C
110
°C
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Question # 25
Soil salinity can be measured by
Choose an answer
Calorimeter
Potometer
Porometer
Conducitvity meter
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Question # 26
Hydrolytic coversion of sucrose into glucose and fructose is known as
Choose an answer
Induction
Inversion
Insertion
Inhibition
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Question # 27
When a nitrogeneous base combine with a sugar it is called
Choose an answer
Ribose
Nucleotides
Nucleoside
None
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Question # 28
Octane number is zero for
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n-Heptane
Isooctane
n-Hexane
Isoheptane
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Question # 29
In the periodic table, the element with atomic number 16 will be placed in the group
Choose an answer
Fourteen
Sixteen
Thirteen
Fifteen
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Question # 30
The free spaces between the metal atoms and its crystal lattice are called
Choose an answer
Valance spaces
Empty spaces
Interstices
None
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Question # 31
Azeotropic mixture of HCl and water has
Choose an answer
48% HCl
22.2% HCl
36% HCl
20.2% HCl
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