JEE Main 2020 (Online) 6th September Morning Slot
JEE Main / 25 questions
2026Sun, Sep 6, 2020 3:30 AM25 PYQs
1Aldehydes Ketones And Carboxylic Acids
Consider the following reactions
'A' is :
'A' is :
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2Aldehydes Ketones And Carboxylic Acids
The major products of the following reaction are :
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3Basics Of Organic Chemistry
Which of the following compounds shows
geometrical isomerism?
geometrical isomerism?
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4Chemical Bonding And Molecular Structure
The number of Cl = O bonds in perchloric acid
is, "________".
is, "________".
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5Chemical Equilibrium
For the reaction
Fe2N(s) + \({3 \over 2}\)H2(g) ⇌ 2Fe(s) + NH3(g)
Fe2N(s) + \({3 \over 2}\)H2(g) ⇌ 2Fe(s) + NH3(g)
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6Chemical Equilibrium
The variation of equilibrium constant with
temperature is given below :
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temperature is given below :
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7Chemical Kinetics And Nuclear Chemistry
Consider the following reactions
A \(\to\) P1 ; B \(\to\) P2 ; C \(\to\) P3 ; D \(\to\) P4,
The order of the above reactions are a, b, c,
and d, respectively. The following graph is
obtained when log[rate] vs. log[conc.] are
plotted...
A \(\to\) P1 ; B \(\to\) P2 ; C \(\to\) P3 ; D \(\to\) P4,
The order of the above reactions are a, b, c,
and d, respectively. The following graph is
obtained when log[rate] vs. log[conc.] are
plotted...
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8Compounds Containing Nitrogen
The increasing order of pKb values of the
following compounds is :
following compounds is :
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9Coordination Compounds
The species that has a spin-only magnetic
moment of 5.9 BM, is :
(Td = tetrahedral)
moment of 5.9 BM, is :
(Td = tetrahedral)
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10D And F Block Elements
The lanthanoid that does NOT show +4 oxidation
state is :
state is :
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11D And F Block Elements
The set that contains atomic numbers of only
transition elements, is :
transition elements, is :
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12Electrochemistry
Potassium chlorate is prepared by the
electrolysis of KCl in basic solution
6OH- + Cl- \(\to\) ClO3- + 3H2O + 6e-
If only 60% of the current is utilized in the
reaction, the time (rounded to the nearest hour)
required to produce 10 g of K...
electrolysis of KCl in basic solution
6OH- + Cl- \(\to\) ClO3- + 3H2O + 6e-
If only 60% of the current is utilized in the
reaction, the time (rounded to the nearest hour)
required to produce 10 g of K...
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13Environmental Chemistry
The presence of soluble fluoride ion upto
1 ppm concentration in drinking water, is :
1 ppm concentration in drinking water, is :
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14Gaseous State
A spherical balloon of radius 3 cm containing
helium gas has a pressure of 48 \(\times\) 10–3 bar. At
the same temperature, the pressure, of a
spherical balloon of radius 12 cm containing
the same amount of gas will be ________ $$ \times ...
helium gas has a pressure of 48 \(\times\) 10–3 bar. At
the same temperature, the pressure, of a
spherical balloon of radius 12 cm containing
the same amount of gas will be ________ $$ \times ...
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15Hydrocarbons
The major product obtained from the following
reaction is :
reaction is :
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16Hydrocarbons
The major product of the following reaction is :
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17Ionic Equilibrium
Arrange the following solutions in the
decreasing order of pOH :
(A) 0.01 M HCl
(B) 0.01 M NaOH
(C) 0.01 M CH3COONa
(D) 0.01 M NaCl
decreasing order of pOH :
(A) 0.01 M HCl
(B) 0.01 M NaOH
(C) 0.01 M CH3COONa
(D) 0.01 M NaCl
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18Isolation Of Elements
The incorrect statement is :
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19P Block Elements
The correct statement with respect to
dinitrogen is :
dinitrogen is :
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20Polymers
Consider the Assertion and Reason given
below.
Assertion (A) : Ethene polymerized in the
presence of Ziegler Natta Catalyst at high
temperature and pressure is used to make
buckets and dustbins.
Reason (R) : High density polymers are closel...
below.
Assertion (A) : Ethene polymerized in the
presence of Ziegler Natta Catalyst at high
temperature and pressure is used to make
buckets and dustbins.
Reason (R) : High density polymers are closel...
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21Practical Organic Chemistry
In an estimation of bromine by Carius method,
1.6 g of an organic compound gave 1.88 g of
AgBr. The mass percentage of bromine in the
compound is _______.
(Atomic mass, Ag = 108, Br = 80 g mol–1)
1.6 g of an organic compound gave 1.88 g of
AgBr. The mass percentage of bromine in the
compound is _______.
(Atomic mass, Ag = 108, Br = 80 g mol–1)
INTEGER+4 / -02020
22S Block Elements
Among the sulphates of alkaline earth metals,
the solubilities of BeSO4 and MgSO4 in water,
respectively, are :
the solubilities of BeSO4 and MgSO4 in water,
respectively, are :
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23Solutions
The elevation of boiling point of 0.10 m
aqueous CrCl3.xNH3 solution is two times that
of 0.05 m aqueous CaCl2 solution. The value of
x is ______.
[Assume 100% ionisation of the complex and
CaCl2, coordination number of Cr as 6, and that
al...
aqueous CrCl3.xNH3 solution is two times that
of 0.05 m aqueous CaCl2 solution. The value of
x is ______.
[Assume 100% ionisation of the complex and
CaCl2, coordination number of Cr as 6, and that
al...
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24Some Basic Concepts Of Chemistry
A solution of two components containing
n1 moles of the 1st component and n2 moles of
the 2nd component is prepared. M1 and M2 are
the molecular weights of component 1 and 2
respectively. If d is the density of the solution
in g mL–1, C2 is...
n1 moles of the 1st component and n2 moles of
the 2nd component is prepared. M1 and M2 are
the molecular weights of component 1 and 2
respectively. If d is the density of the solution
in g mL–1, C2 is...
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25Surface Chemistry
Kraft temperature is the temperature :
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