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Recent questions in 2006
Questions
>>
JEEMAIN and NEET
>>
JEEMAIN PAST PAPERS
>>
2006
If
0
<
x
<
π
and
cos
x
+
sin
x
=
1
2
, then
tan
x
is:
jeemain
math
past papers
2006
150
asked
Nov 13, 2018
by
pady_1
0
answers
If
z
2
+
z
+
1
=
0
, where
z
is complex number, then the value of
(
z
+
1
z
)
2
+
(
z
2
+
1
z
2
)
2
+
(
z
3
+
1
z
3
)
2
+
.
.
.
+
(
z
6
+
1
z
6
)
2
is :
jeemain
math
past papers
2006
149
asked
Nov 13, 2018
by
pady_1
0
answers
If
a
1
,
a
2
,
.
.
.
.
,
a
n
are in HP, then the expression
a
1
a
2
+
a
2
a
3
+
.
.
.
.
+
a
n
−
1
a
n
is equal to :
jeemain
math
past papers
2006
148
asked
Nov 13, 2018
by
pady_1
0
answers
Let C be the circle with centre
(
0
,
0
)
and radius
3
units. The equation of the locus of the mid points of the chords of the circle
C
that subtend an angle of
2
π
3
at its centre, is :
jeemain
math
past papers
2006
147
asked
Nov 13, 2018
by
pady_1
0
answers
The value of
∫
a
1
[
x
]
f
′
(
x
)
d
x
,
a
>
1
, where
[
x
]
denotes the greatest integer not exceeding
x
, is :
jeemain
math
past papers
2006
146
asked
Nov 13, 2018
by
pady_1
0
answers
The differential equation whose solution is
A
x
2
+
B
y
2
=
1
, where
A
and
B
are arbitrary constant, is of :
jeemain
math
past papers
2006
145
asked
Nov 13, 2018
by
pady_1
0
answers
The image of the point
(
−
1
,
3
,
4
)
in the plane
x
−
2
y
=
0
is :
jeemain
math
past papers
2006
144
asked
Nov 13, 2018
by
pady_1
0
answers
If the lines
3
x
−
4
y
−
7
=
0
and
2
x
−
3
y
−
5
=
0
are two diameters of a circle of area
49
π
s
q
u
a
r
e
units, the equation of the circle is :
jeemain
math
past papers
2006
143
asked
Nov 13, 2018
by
pady_1
0
answers
If
x
m
y
n
=
(
x
+
y
)
m
+
n
, then
d
y
d
x
is :
jeemain
math
past papers
2006
142
asked
Nov 13, 2018
by
pady_1
0
answers
If
(
a
,
a
2
)
falls inside the angle made by the lines
y
=
x
2
,
x
>
0
and
y
=
3
x
,
x
>
0
, then
a
belongs to :
jeemain
math
past papers
2006
141
asked
Nov 13, 2018
by
pady_1
1
answer
A triangular park is enclosed on two sides by a fence and on the third side by a straight river bank. The two sides having fence are of same length
x
. The maximum area enclosed by the park is :
jeemain
math
past papers
2006
140
asked
Nov 13, 2018
by
pady_1
0
answers
If
x
is real, the maximum value of
3
x
2
+
9
x
+
17
3
x
2
+
9
x
+
7
is :
jeemain
math
past papers
2006
139
asked
Nov 13, 2018
by
pady_1
0
answers
Angle between the tangents to the curve
y
=
x
2
−
5
x
+
6
at the points
(
2
,
0
)
and
(
3
,
0
)
is :
jeemain
math
past papers
2006
138
asked
Nov 13, 2018
by
pady_1
0
answers
The function
f
(
x
)
=
x
2
+
2
x
has a local minimum at :
jeemain
math
past papers
2006
137
asked
Nov 13, 2018
by
pady_1
0
answers
Let
a
1
,
a
2
,
a
3
,
.
.
.
.
cannot be terms of an AP. If
a
1
+
a
2
+
.
.
.
.
+
a
p
a
1
+
a
2
+
.
.
.
.
+
a
q
=
p
2
q
2
,
p
≠
q
, then
a
6
a
21
equals :
jeemain
math
past papers
2006
136
asked
Nov 13, 2018
by
pady_1
0
answers
Let
A
=
[
1
2
3
4
]
and
B
=
[
a
0
0
b
]
,
a
,
b
,
∈
N
. Then :
jeemain
math
past papers
2006
135
asked
Nov 13, 2018
by
pady_1
0
answers
The set of points, where
f
(
x
)
=
x
1
+
|
x
|
is differentiable, is :
jeemain
math
past papers
2006
134
asked
Nov 13, 2018
by
pady_1
0
answers
A body falling from rest under gravity passes a certain point P. It was at a distance of 400 m from P, 4 seconds prior to passing through P. If
g
=
10
m
/
s
2
, then the height above the point P from where the body began to fall is :
jeemain
math
past papers
2006
133
asked
Nov 13, 2018
by
pady_1
0
answers
At a telephone enquiry system the number of phone calls regarding relevant enquiry follow Poisson distribution with an average of 5 phone calls during 10 minute time intervals. The probability that there is at the most one phone call during a 10 minute time period, is :
jeemain
math
past papers
2006
132
asked
Nov 13, 2018
by
pady_1
0
answers
A particle has two velocities of equal magnitude inclined to each other at an angle
θ
. If one of them is halved, the angle between the other and the original resultant velocity is bisected by the new resultant. The
θ
is :
jeemain
math
past papers
2006
131
asked
Nov 13, 2018
by
pady_1
0
answers
For natural numbers
m
,
n
if
(
1
−
y
)
m
(
1
+
y
)
n
=
1
+
a
1
y
+
a
2
y
2
+
.
.
.
and
a
1
=
a
2
=
10
, then
(
m
,
n
)
is :
jeemain
math
past papers
2006
130
asked
Nov 13, 2018
by
pady_1
0
answers
If the expansion in power of
x
of the function
1
(
1
−
a
x
)
(
1
−
b
x
)
<br>
a
0
+
a
1
x
+
a
2
x
2
+
a
3
x
3
+
.
.
.
.
,
then
a
n
is :
jeemain
math
past papers
2006
129
asked
Nov 13, 2018
by
pady_1
0
answers
At an election, a voter may vote for any number of candidates not greater than the number to be elected. There are 10 candidates and 4 are to be elected. If a voter votes for at least one candidate, then the number of ways in which he can vote, is :
jeemain
math
past papers
2006
128
asked
Nov 13, 2018
by
pady_1
0
answers
The two lines
x
=
a
y
+
b
,
z
=
c
y
+
d
and
x
=
a
′
y
+
b
′
,
z
=
c
′
y
+
d
′
are perpendicular to each other, if :
jeemain
math
past papers
2006
127
asked
Nov 13, 2018
by
pady_1
0
answers
∫
π
0
x
f
(
sin
x
)
d
x
is equal to :
jeemain
math
past papers
2006
126
asked
Nov 13, 2018
by
pady_1
0
answers
The value of
a
, for which the points A, B, C with position vectors
2
ˆ
i
−
ˆ
j
+
ˆ
k
,
ˆ
i
−
3
ˆ
j
−
5
ˆ
k
and
a
ˆ
i
−
3
ˆ
j
−
ˆ
k
respectively are the vertices of a right angled triangle with
C
=
π
2
are :
jeemain
math
past papers
2006
125
asked
Nov 13, 2018
by
pady_1
0
answers
A straight line through the point
A
(
3
,
4
)
is such that its intercept between the axes is bisected at
A
. Its equation is :
jeemain
math
past papers
2006
124
asked
Nov 13, 2018
by
pady_1
0
answers
The locus of the vertices of the family of parabolas
y
=
a
3
x
2
3
+
a
2
x
2
−
2
a
is :
jeemain
math
past papers
2006
123
asked
Nov 13, 2018
by
pady_1
0
answers
In an ellipse, the distances between its foci is 6 and minor axis is 8. Then its eccentricity is :
jeemain
math
past papers
2006
122
asked
Nov 13, 2018
by
pady_1
1
answer
∫
−
π
/
2
−
3
π
/
2
[
(
x
+
π
)
3
+
cos
2
(
x
+
3
π
)
]
d
x
is equal to :
jeemain
math
past papers
2006
121
asked
Nov 13, 2018
by
pady_1
0
answers
Suppose a population a has 100 observations 101, 102, ..., 200 and another population
B
has 100 observations 151, 152, ...., 250. If
V
A
and
V
B
represent the variances of the two population respectively, then
V
A
V
B
is :
jeemain
math
past papers
2006
120
asked
Nov 13, 2018
by
pady_1
0
answers
ABC is triangle, right angled at A. The resultant of the force acting along
→
A
B
,
→
A
C
with magnitudes
1
A
B
and
1
A
C
respectively is the force along
→
A
D
, where
D
is the foot of the perpendicular from
A
onto
B
C
. The magnitude of the resultant is :
jeemain
math
past papers
2006
119
asked
Nov 13, 2018
by
pady_1
0
answers
All the values of m for which both roots of the equation
x
2
−
2
m
x
+
m
2
−
1
=
0
are greater than
−
2
but less than 4 lie in the interval :
jeemain
math
past papers
2006
118
asked
Nov 13, 2018
by
pady_1
0
answers
Any three vectors such that
→
a
.
→
b
≠
0
,
→
b
.
→
c
≠
0
, then
→
a
and
→
c
are :
jeemain
math
past papers
2006
117
asked
Nov 13, 2018
by
pady_1
0
answers
The value of
10
∑
k
=
1
(
sin
2
k
π
11
+
i
cos
2
k
π
11
)
is :
jeemain
math
past papers
2006
116
asked
Nov 13, 2018
by
pady_1
0
answers
If A and B are square matrices of size
n
×
n
such that
A
2
−
B
2
=
(
A
−
B
)
(
A
+
B
)
, then which of the following will be always true ?
jeemain
math
past papers
2006
115
asked
Nov 13, 2018
by
pady_1
0
answers
The number of values of
x
in the interval
[
0
,
3
π
]
satisfying the equation
2
sin
2
x
+
5
sin
x
−
3
=
0
is :
jeemain
math
past papers
2006
114
asked
Nov 13, 2018
by
pady_1
0
answers
Let
W
denote the words in the English dictionary. Define the relation R by : <br>
R
=
{
(
x
,
y
)
∈
W
×
W
|
the words
x
and
y
have at least one letter in common
}
. Then
R
is :
jeemain
math
past papers
2006
113
asked
Nov 13, 2018
by
pady_1
0
answers
The value of the integral
∫
6
3
√
x
√
9
−
x
+
√
x
d
x
jeemain
math
past papers
2006
112
asked
Nov 13, 2018
by
pady_1
0
answers
If the roots of the quadratic equation
x
2
+
p
x
+
q
=
0
are tan
tan
30
∘
and
tan
15
∘
respectively, then the value of
2
+
q
−
p
is :
jeemain
math
past papers
2006
111
asked
Nov 13, 2018
by
pady_1
0
answers
(
Δ
H
−
Δ
U
)
for the formation of carbon monoxide (CO) from its elements at 298 K is : <br>
(
R
=
8.314
J
K
−
1
m
o
l
−
1
)
jeemain
chemistry
past papers
2006
110
asked
Nov 13, 2018
by
pady_1
0
answers
18 g of glucose
(
C
6
H
12
O
6
)
is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at
100
∘
C
is :
jeemain
chemistry
past papers
2006
109
asked
Nov 13, 2018
by
pady_1
0
answers
<br> The electrophile involved in the above reaction is :
jeemain
chemistry
past papers
2006
108
asked
Nov 13, 2018
by
pady_1
0
answers
How many EDTA (ethylenediaminetetra acetic acid ) molecules are required to make an octahedral complex with a
C
a
2
+
ion ?
jeemain
chemistry
past papers
2006
107
asked
Nov 13, 2018
by
pady_1
0
answers
The enthalpy changes for the following processes are listed below : <br>
C
l
2
(
g
)
=
2
C
l
(
g
)
,
242.3
k
J
m
o
l
−
1
<br>
I
2
(
g
)
=
2
I
(
g
)
,
151.0
k
J
m
o
l
−
1
<br>
I
C
l
(
g
)
=
I
(
g
)
+
C
l
(
g
)
,
211.3
k
J
m
o
l
−
1
<br>
I
2
(
s
)
=
I
2
(
g
)
,
62.76
k
J
m
o
l
−
1
<br> Given that the standard states for iodine and chlorine are
I
2
(
s
)
and
C
l
2
(
g
)
, the standard enthalpy of formation of
I
C
l
(
g
)
is :
jeemain
chemistry
past papers
2006
106
asked
Nov 13, 2018
by
pady_1
0
answers
Density of a
2.05
M
solution of acetic acid in water is
1.02
g
/
m
L
. The molality of the solution is :
jeemain
chemistry
past papers
2006
105
asked
Nov 13, 2018
by
pady_1
0
answers
The ionic mobility of alkali metal ions in aqueous solution is maximum for :
jeemain
chemistry
past papers
2006
104
asked
Nov 13, 2018
by
pady_1
0
answers
Resistance of a conductivity cell filled with a solution of an electrolyte of concentration
0.1
M
is
100
Ω
. The conductivity of this solution is
1.29
S
m
−
1
. Resistance of the same cell when filled with
0.2
M
of the same solution is
520
Ω
. The molar conductivity of
0.02
M
solution of the electrolyte will be :
jeemain
chemistry
past papers
2006
103
asked
Nov 13, 2018
by
pady_1
0
answers
Lanthanide contraction is caused due to :
jeemain
chemistry
past papers
2006
102
asked
Nov 13, 2018
by
pady_1
0
answers
The following mechanism has been proposed for the reaction of
N
O
with
B
r
2
to form
N
O
B
r
: <br>
N
O
(
g
)
+
B
r
2
(
g
)
⇌
N
O
B
r
2
(
g
)
<br>
N
O
B
r
2
(
g
)
+
N
O
(
g
)
→
2
N
O
B
r
(
g
)
<br> If the second step is the rate determining step, the order of the reaction with respect to
N
O
(
g
)
is :
jeemain
chemistry
past papers
2006
101
asked
Nov 13, 2018
by
pady_1
0
answers
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