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questions
List of practice Questions
What is the IUPAC name of the following compound ?
JEE Main - 2019
JEE Main
Chemistry
Organic Chemistry
What is the molar solubility of
$Al(OH)_3$
in
$0.2\, M\, NaOH$
solution ? Given that, solubility product of
$Al(OH)_3 = 2.4 \times 10^{-24}$
:
JEE Main - 2019
JEE Main
Chemistry
Equilibrium
What is the position and nature of image formed by lens combination shown in figure?
$(f_1, f_2$
are focal lengths)
JEE Main - 2019
JEE Main
Physics
Ray optics and optical instruments
What would be the molality of
$20\%$
(mass / mass) aqueous solution of
$KI$
? (molar mass of
$KI = 166\, g\, mol^{-1}$
)
JEE Main - 2019
JEE Main
Chemistry
Solutions
When the first electron gain enthalpy
$( \Delta_{eg}H) $
of oxygen is
$-141\, kJ/mol$
, its second electron gain enthalpy is :
JEE Main - 2019
JEE Main
Chemistry
Classification
When the switch
$S$
, in the circuit shown, is closed, then the value of current
$i$
will be :
JEE Main - 2019
JEE Main
Physics
Current electricity
Which amongst the following is the strongest acid ?
JEE Main - 2019
JEE Main
Chemistry
Equilibrium
Which is wrong with respect to our responsibility as a human being to protect our environment ?
JEE Main - 2019
JEE Main
Chemistry
Environmental Chemistry
Which of the following compounds will show the maximum enol content?
JEE Main - 2019
JEE Main
Chemistry
Organic Chemistry
With respect to an ore, Ellingham diagram helps to predict the feasibility of its -
JEE Main - 2019
JEE Main
Chemistry
General Principles and Processes of Isolation of Elements
Wilkinson catalyst is :
JEE Main - 2019
JEE Main
Chemistry
coordination compounds
Which of the following statements is not true about RNA?
JEE Main - 2019
JEE Main
Chemistry
Biomolecules
Which of the following is a thermosetting polymer?
JEE Main - 2019
JEE Main
Chemistry
Polymers
Which of the following is a condensation polymer?
JEE Main - 2019
JEE Main
Chemistry
Polymers
The major product of the following reaction is
JEE Main - 2019
JEE Main
Chemistry
Chemical Reactions
The IUPAC name of the following compound is:
JEE Main - 2019
JEE Main
Chemistry
Organic Chemistry
$5$
moles of an ideal gas at
$100\, K$
are allowed to undergo reversible compression till its temperature becomes
$200\, K$
. If
$C_{V} =28 JK^{-1}mol^{-1} , caculate \Delta\, U$
and
$\Delta \,pV $
for this process. (
$R = 8.0 \, JK^{-1}mol^{-1}$
]
JEE Main - 2019
JEE Main
Chemistry
Thermodynamics
Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero)
JEE Main - 2019
JEE Main
Chemistry
Thermodynamics
Enthalpy of sublimation of iodine is
$ {24 \; cal \; g^{-1}}$
at
$200^{\circ}C$
. If specific heat of
$I_2(s)$
and
$I_2(vap)$
are
$0.055$
and
$0.031\, cal\, g^{-1}K^{-1}$
respectively, then enthalpy of sublimation of iodine at
$250^{\circ}C$
in
$cal\, g^{-1}$
is :
JEE Main - 2019
JEE Main
Chemistry
Thermodynamics
For diatomic ideal gas in a closed system, which of the following plots does not correctly describe the relation between various thermodynamic quantities ?
JEE Main - 2019
JEE Main
Chemistry
Thermodynamics
For silver,
$ {C_{p}(JK^{-1} mol^{-1}) = 23 + 0.01T}$
. If the temperature (T) of
$3$
moles of silver is raised from
$300\,K$
to
$1000\, K$
at
$1\, atm$
pressure, the value of
$\Delta H$
will be close to
JEE Main - 2019
JEE Main
Chemistry
Thermodynamics
A rigid square loop of side 'a' and carrying current I
$_2$
is lying on a horizontal surface near a long current I
$_1$
carrying wire in the same plane as shown in figure. The net force on the loop due to wire will be :
JEE Main - 2019
JEE Main
Physics
Electric Current
In a
\(\Delta ABC\)
. with usual notation, match the items in List - I with the items in List - II and choose the correct option.
List I
List II
(A)
\(r_1r_2\sqrt{\bigg(\frac{4R-r_1-r_2}{r_1+r_2}\bigg)}\)
1
\(b\)
(B)
\(\frac{r_2(r_3+r_1)}{\sqrt{r_1r_2+r_2r_3+r_3r_1}}\)
2
\(a^2,b^2,c^2 are \;in \;AP\)
(C)
\(\frac{a}{c}=\frac{sin(A-B)}{sin(B-C)}\)
3
\(\triangle\)
(D)
\(bc\;cos^2\frac{A}{2}\)
4
\(R\; r_1r_2r_3\)
5
\(s(s-a)\)
JEE Main - 2019
JEE Main
Mathematics
Trigonometric Identities
Molal depression constant for a solvent is
$4.0\, kg\, mol^{-1}$
. The depression in the freezing point of the solvent for
$0.03\, mol\, kg^{-1}$
solution of
$ {K2SO4}$
is : (Assume complete dissociation of the electrolyte)
JEE Main - 2019
JEE Main
Chemistry
Colligative Properties
NaH is an example of :
JEE Main - 2019
JEE Main
Chemistry
Hydrides
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