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jee main
| 2018
Solutions for all the questions from jee main
of year 2018
EXAM
board examination
iit jee
jee advanced
jee main
neet
rtb
YEAR
All
2018
SUBJECT
math
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class 12
JEE Main
How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of diborane?
(Atomic weight of B = 10.8 u)
class 12
JEE Main
According to molecular orbital theory, which of the following will not be a viable molecule?
class 12
JEE Main
Which of the following are Lewis acids?
class 12
JEE Main
Which of the following compounds contain(s) no covalent bond(s)?
$KCl,PH_{3},O_{2},B_{2}H_{6},H_{2}SO_{4}$
class 12
JEE Main
An aqueous solution contains an unknown concentration of
$Ba_{2+}$
. When 50 mL of a 1 M solution of
$Na_{2}SO_{4}$
is added,
$BaSO_{4}$
just begins to precipitate. The final volume is 500 mL. The solubility product of
$BaSO_{4}$
is
$1×10_{–10}$
. What is the original concentration of
$Ba_{2+}$
?
class 12
JEE Main
The combustion of benzene (l) gives
$CO_{2}(g)$
and
$H_{2}O(l)$
. Given that heat of combustion of benzene at constant volume is
$–3263.9kJmol_{–1}$
at
$25_{∘}C$
, heat of combustion (in kJ
$mol_{–1}$
) of benzene at constant pressure will be
(R = 8.314 JK–1 mol–1)
class 11
Math
Algebra
Mathematical Reasoning
The Boolean expression
$(p∨q)∨(p∧q)$
is equivalent to
class 12
Math
Algebra
Vector Algebra
Let
$u$
be a vector coplanar with the vectors
$a=2i^+3j^ −k^$
and
$b=j^ +k^$
If
$u$
is perpendicular to
$a$
and
$u.b=24$
then
$∣u∣_{2}$
is equal to
class 12
JEE Main
The major product of the following reaction is:
class 12
JEE Main
When metal ‘M’ is treated with NaOH, a white gelatinous precipitate ‘X’ is obtained, which is soluble in excess of NaOH. Compound ‘X’ when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal ‘M’ is
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jee main
| 2018
Solutions for all the questions from jee main
of year 2018
30
JEE MAINS
Crash Course
●LIVE
Classes starting
15
^{th}
June 2021
30 Students | 90 Days | 24x7 Video Doubt Support
₹16000
₹8000
KNOW MORE
30
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Crash Course
●LIVE
Classes starting
15
^{th}
June 2021
30 Students | 90 Days | 24x7 Video Doubt Support
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₹8000
KNOW MORE
Filter Results
EXAM
board examination
iit jee
jee advanced
jee main
neet
rtb
YEAR
All
2018
SUBJECT
math
class 12
JEE Main
How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of diborane?
(Atomic weight of B = 10.8 u)
class 12
JEE Main
According to molecular orbital theory, which of the following will not be a viable molecule?
class 12
JEE Main
Which of the following are Lewis acids?
class 12
JEE Main
Which of the following compounds contain(s) no covalent bond(s)?
$KCl,PH_{3},O_{2},B_{2}H_{6},H_{2}SO_{4}$
class 12
JEE Main
An aqueous solution contains an unknown concentration of
$Ba_{2+}$
. When 50 mL of a 1 M solution of
$Na_{2}SO_{4}$
is added,
$BaSO_{4}$
just begins to precipitate. The final volume is 500 mL. The solubility product of
$BaSO_{4}$
is
$1×10_{–10}$
. What is the original concentration of
$Ba_{2+}$
?
class 12
JEE Main
The combustion of benzene (l) gives
$CO_{2}(g)$
and
$H_{2}O(l)$
. Given that heat of combustion of benzene at constant volume is
$–3263.9kJmol_{–1}$
at
$25_{∘}C$
, heat of combustion (in kJ
$mol_{–1}$
) of benzene at constant pressure will be
(R = 8.314 JK–1 mol–1)
class 11
Math
Algebra
Mathematical Reasoning
The Boolean expression
$(p∨q)∨(p∧q)$
is equivalent to
class 12
Math
Algebra
Vector Algebra
Let
$u$
be a vector coplanar with the vectors
$a=2i^+3j^ −k^$
and
$b=j^ +k^$
If
$u$
is perpendicular to
$a$
and
$u.b=24$
then
$∣u∣_{2}$
is equal to
class 12
JEE Main
The major product of the following reaction is:
class 12
JEE Main
When metal ‘M’ is treated with NaOH, a white gelatinous precipitate ‘X’ is obtained, which is soluble in excess of NaOH. Compound ‘X’ when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal ‘M’ is
1
2
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4
5
6
7
8
9
10
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page
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