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Recent questions tagged q34
Questions
According to the Lewis acid-base concept
sat
chemistry
chemical-equilibrium
jeemain
aipmt
equilibrium
easy
q34
biology
asked
Nov 23, 2013
by
mosymeow_1
1
answer
The wheat variety introduced from Australia
jeemain
eamcet
biology
1999
q34
asked
Nov 23, 2013
by
thanvigandhi_1
0
answers
If the adjoint of a $3\times 3$ matrix P is $\begin{bmatrix}1 &4&4\\2&1&7\\1&1&3\end{bmatrix}$ then the possible value(s) of the determinant of P is
jeemain
math
class12
ch4
determinants
q34
adjoint-and-inverse
easy
asked
Nov 21, 2013
by
sreemathi.v
1
answer
If $x>1,y>1,z>1$ are in G.P then $\large\frac{1}{1+ln\; x},\frac{1}{1+ln\; y},\frac{1}{1+ln \;z}$ are in
jeemain
math
class11
ch3
trigonometric-functions
q34
trignometric-equations
difficult
asked
Nov 19, 2013
by
sreemathi.v
1
answer
A tower, of x meters high, has a flagstaff at its top. The tower and the flagstaff subtend equal angles at a point distant y meters from the foot of the tower. Then the length of the flagstaff(in meters), is :
jeemain
eamcet
math
2005
q34
asked
Nov 12, 2013
by
meena.p
1
answer
Study the following lists
jeemain
eamcet
biology
2010
q34
asked
Nov 11, 2013
by
thanvigandhi_1
0
answers
In which of the following reactions, $MgO$ is not formed?
jeemain
eamcet
chemistry
2005
q34
p-block-elements
asked
Nov 11, 2013
by
meena.p
1
answer
If $\overrightarrow a,\overrightarrow b\:\:and\:\:\overrightarrow c$ are non coplanar vectors, then for real $\lambda$, $[\lambda(\overrightarrow a+\overrightarrow b)\:\lambda^2\overrightarrow b\:\lambda\overrightarrow c]=[\overrightarrow a\:\overrightarrow b+\overrightarrow c\:\overrightarrow c]$, for:
jeemain
math
class12
ch10
vector-algebra
medium
scalar-product
q34
asked
Nov 10, 2013
by
rvidyagovindarajan_1
1
answer
An inductance 1 H is connected in series with an AC source of 220 V and 50Hz. The inductive reactance (in ohms) is :
jeemain
eamcet
physics
2005
q34
asked
Nov 8, 2013
by
meena.p
1
answer
If $\overrightarrow {a} + \overrightarrow {b}+ \overrightarrow c=\overrightarrow {0}$ and $| \overrightarrow {a} |=3, | \overrightarrow {b}|=4$ and $|\overrightarrow {c}|=\sqrt {37},$ then the angle between $\overrightarrow{a}$ and $\overrightarrow {b}$ is :
jeemain
eamcet
math
2006
q34
asked
Nov 6, 2013
by
meena.p
1
answer
When compound X is oxidised by acidified potassium dichromate, compound Y id formed. Compound Y on reduction with $LiA | H_4$ gives X.X and Y respectively are :
jeemain
eamcet
chemistry
2006
q34
asked
Oct 30, 2013
by
meena.p
1
answer
When positively charged particle enters a uniform magnetic field with uniform velocity, its trajectory can be :
jeemain
eamcet
physics
2006
q34
asked
Oct 29, 2013
by
meena.p
1
answer
A student observed a plant with stellate hairs on vegetative parts and the fruit dehiseing into many seeded mericarps. Which one of the following characters is also associated with that plant?
jeemain
eamcet
biology
2011
q34
asked
Oct 27, 2013
by
thanvigandhi_1
1
answer
The angle of elevation of an object from a point P on the level ground is $\alpha$. Moving d meters on the ground towards the object. the angle of elevation is found to be $\beta$. Then the height (in meters) of the object is
jeemain
eamcet
math
2007
q34
asked
Oct 25, 2013
by
meena.p
2
answers
224 ml of triatomic gas weights 1g at 173k and 1atm .The mass of one atom of this gas is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q34
medium
asked
Oct 24, 2013
by
sreemathi.v
1
answer
Aqueous solution of an organic compound. $'A'$ on electrolysis liberates acetylene and $CO_2$ at anode. $'A'$ is
jeemain
eamcet
chemistry
2007
q34
asked
Oct 24, 2013
by
meena.p
1
answer
Two wires A and B are of lengths 40 cm and 30 cm. A is bent into a circle of radius r and B into an arc of radius r. A current $t_1$ is passed through A and $t_2$ through B. To have the same magnetic induction at the center, the ratio of $t_1:t_2$ is
jeemain
eamcet
physics
2007
q34
asked
Oct 23, 2013
by
meena.p
1
answer
From the top of a hill the angles of depression of the top and the bottom of a pillar are $\alpha$ and $\beta$ respectively. The height (in meters) of the pillar is
jeemain
eamcet
math
2008
q34
asked
Oct 17, 2013
by
meena.p
1
answer
Identify the correct pair of characters with reference to Pteris
jeemain
eamcet
biology
2012
q34
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
The value of $\cot\sum\limits_{n=1}^{23}\cot^{-1}\big(1+\sum\limits_{k=1}^n 2k\big)$ is
jeemain
math
class12
ch2
inverse-trigonometric-functions
q34
inverse-trignometric-properties
medium
asked
Oct 16, 2013
by
sreemathi.v
1
answer
If $m_1,m_2,m_3$ and $m_4$ are respectively the magnitudes of the vectors $\overrightarrow{a_1}=2 \overrightarrow{i}-\overrightarrow{j}+\overrightarrow{k},\;\;\overrightarrow{a_2}=3 \overrightarrow{i}-4\overrightarrow{j}-4\overrightarrow{k},\;\;\overrightarrow{a_3}=\overrightarrow{i}+\overrightarrow{j}-\overrightarrow{k}$ and $\overrightarrow{a_4}=-\overrightarrow{i}+3 \overrightarrow{j}+\overrightarrow{k}$ then the correct order of $m_1,m_2,m_3,m_4$ is :
jeemain
eamcet
math
2009
q34
asked
Oct 9, 2013
by
meena.p
1
answer
If $\sin\theta+cosec\theta=2$ then $\sin^2\theta+cosec^2\theta$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q34
trignometric-functions
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
Study the following lists
jeemain
eamcet
biology
2013
q34
asked
Oct 4, 2013
by
thanvigandhi_1
1
answer
A wooden cube is floating in water when a mass $m= 0.2\;kg$ is kept on its top, When the mass is removed the cube rises by $2 \;cm$. The side of the cube is [density of water $=10^3 kg/m^3$]
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q34
medium
asked
Oct 4, 2013
by
meena.p
1
answer
$\overrightarrow {u}=\overrightarrow {a}-\overrightarrow {b},\overrightarrow {v}=\overrightarrow {a}+\overrightarrow {b},| \overrightarrow {a} | =| \overrightarrow {b} |=2 => | \overrightarrow {u} \times \overrightarrow {v} |=$
jeemain
eamcet
math
2010
q34
asked
Sep 26, 2013
by
meena.p
1
answer
If A is a matrix such that $\begin{bmatrix} 2 & 1 \\ 3 & 2 \end{bmatrix} A\begin{bmatrix} 1 & 1 \end{bmatrix} =\begin{bmatrix} 1 & 0 \\ 0 & 0 \end{bmatrix}$ then A=
jeemain
eamcet
math
2011
q34
asked
Sep 20, 2013
by
meena.p
1
answer
The shortest distance between the lines $ \overrightarrow {r}=3\overrightarrow {i}+5 \overrightarrow {j}+ 7 \overrightarrow {k}+ \lambda (\overrightarrow {i}+2 \overrightarrow {j}+\overrightarrow {k})$ and $\overrightarrow {r}=- \overrightarrow {i} -\overrightarrow {j} -\overrightarrow {k}+ \mu (7\overrightarrow {i}-6 \overrightarrow {j}+\overrightarrow {k}) $ is
jeemain
eamcet
math
2013
q34
asked
Sep 16, 2013
by
meena.p
1
answer
The mass number of a nuclide is 125. Its nuclear radius is .................. fermi.
jeemain
eamcet
chemistry
1991
fitb
q34
asked
Sep 12, 2013
by
meena.p
0
answers
A particle is projected from the surface of earth with an initial speed of 4 km/s . Find the maximum height attained by the particle.Radius of earth =6400 km and $g= 9.8 m/s^2$
jeemain
physics
class11
unit6
gravitation
q34
medium
asked
Aug 20, 2013
by
meena.p
1
answer
A bullet fired from rifle. The ratio of kinetic energy of rifle to that of bullet after firing is
jeemain
physics
class11
unit4
work-power-energy
q34
medium
asked
Jul 19, 2013
by
meena.p
1
answer
Of the following quantities which one has dimensions different from the remaining three ?
jeemain
physics
class11
ch2
units-and-measurement
q34
easy
dimensional-formulae-and-analysis
asked
Jun 18, 2013
by
meena.p
1
answer
Which of the following function is increasing in $(0 , \infty)$
tnstate
class12
bookproblem
p232
objective
q34
modelpaper
oct-2006
asked
May 18, 2013
by
poojasapani_1
1
answer
If a line makes $45^{\circ},60^{\circ}$ with positive direction of axes $x$ and $y$ then the angle it makes with the $z$ axis is
tnstate
class12
bookproblem
p267
objective
q34
asked
May 10, 2013
by
poojasapani_1
1
answer
A tells lie is 30% cases, and B in 35% cases find the probability that both state same fact.
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q34
p42
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate:\[\int \sin^2\bigg(2\tan^{-1}\sqrt {\frac{1+x}{1-x}}\bigg)dx.\qquad -1\leq x \leq1\]
cbse
class12
additionalproblem
kvquestionbank2012
ch7
q34
p26
math
asked
Feb 2, 2013
by
meena.p
0
answers
Find the point on the curve $ y=x^3-11x+5 $ at which the tangent has equation $y=x-11$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q34
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Prove that $ \Large\frac{d}{dx}\bigg[\Large\frac{1}{4 \sqrt 2} \normalsize log\bigg|\Large\frac{x^2+\sqrt 2 x+1}{x^2- \sqrt 2 x+1} \bigg|+\Large\frac {1}{2 \sqrt 2} \normalsize \tan^{-1} \Large\frac{\sqrt 2 x}{1-x^2}\bigg]=\Large\frac{1}{1+x^4}$
cbse
class12
kvquestionbank2012
ch5
q34
p13
difficult
math
sec-a
asked
Jan 25, 2013
by
meena.p
1
answer
Find the values of a and b such that $ A^2+aI=bA\;where\; A=\begin{bmatrix} 3 & 1 \\ 7 & 5 \end{bmatrix}$
cbse
class12
additionalproblem
kvquestionbank2012
ch3
q34
p9
math
sec-b
asked
Jan 24, 2013
by
meena.p
0
answers
The degree of the differential equation $\large\bigg(\frac{d^2y}{dx^2}\bigg)^2+\bigg(\frac{dy}{dx}\bigg)^2$$=x\sin \bigg(\large\frac{dy}{dx}\bigg)$ is:\[(A)\;1\quad(B)\;2\quad(C)\;3\quad(D)\;not\;defined\]
cbse
class12
ch9
sec-a
q34
p195
objective
exemplar
easy
math
asked
Jan 18, 2013
by
sreemathi.v
1
answer
The vector $\overrightarrow{a}+\overrightarrow{b}$ bisects the angle between the non-collinear vectors $\overrightarrow{a}$ and $\overrightarrow{b}$ if__________.
cbse
class12
ch10
q34
p218
exemplar
difficult
sec-b
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
The area of the region bounded by the curve $x=2y+3$ and the y-lines $y=1$ and $y=-1$ is \[(A)\;4 sq.units\quad(B)\;\frac{3}{2} sq. units\quad(C)\;6 sq.units\quad(D)8 sq.units\]
cbse
class12
ch8
q34
p178
objective
exemplar
sec-b
easy
math
asked
Jan 16, 2013
by
sreemathi.v
1
answer
Evaluate the following: $\int\limits_0^{\Large \frac{1}{2}}\frac{dx}{(1+x^2)\sqrt {1-x^2}}$$(Hint:let\;x=\sin\theta)$
cbse
class12
ch7
q34
p165
exemplar
sec-b
difficult
math
asked
Jan 14, 2013
by
sreemathi.v
1
answer
The sum of the surface area of a rectangular parallelepiped with sides x,2x and $\Large\frac{x}{3}$ and a sphere is given to be constant.Prove that the sum of their volume is minimum,if x is equal to three times the radius of the sphere.Also find the minimum value of the sum of their volumes.
cbse
class12
ch6
q34
p138
exemplar
math
sec-c
asked
Jan 11, 2013
by
sreemathi.v
0
answers
Two natural numbers r,s are drawn one at a time,without replacement from the set S=1,2,3,......,n.Find $P[r\leq p|s\leq p],where \;p\in S$
cbse
class12
ch13
q34
p275
short-answer
exemplar
sec-a
easy
math
asked
Jan 9, 2013
by
sreemathi.v
1
answer
Corner points of the feasible region determined by the system of linear constraints are $(0,3),(1,1)$ and $(3,0).$
cbse
class12
ch12
q34
p256
objective
exemplar
sec-a
easy
math
asked
Jan 8, 2013
by
sreemathi.v
1
answer
The area of the quadilateral $ABCD$ where $A(0,4,1),B(2,3,-1),C(4,5,0)$ and $D(2,6,2)$ is equal to
cbse
class12
ch11
sec-c
q34
p238
objective
exemplar
medium
math
asked
Jan 4, 2013
by
sreemathi.v
1
answer
Differentiate the following w.r.t x: $(\sin x)^{\large\cos x}$.
cbse
class12
ch5
q34
p109
short-answer
exemplar
sec-a
easy
math
asked
Dec 31, 2012
by
sreemathi.v
1
answer
Prove that the curves \( y^2 = 4x\) and \( x^2 = 4y\) divide the area of the square bounded by \( x = 0, x = 4, y = 4\) and \(y = 0\) into three equal parts.
cbse
class12
modelpaper
2012
sec-c
q34
math
asked
Dec 29, 2012
by
thanvigandhi_1
0
answers
If A and B are invertible matrices,then which of the following is not correct?\[\begin{array}{1 1}(A)\quad adjA=|A|.A^{-1} & (B)\quad det(A)^{-1}=[det(A)]^{-1}\\(C)\quad (AB)^{-1}=B^{-1}A^{-1} & (D)\quad (A+B)^{-1}=B^{-1}+A^{-1}\end{array}\]
cbse
class12
ch4
sec-a
q34
p82
objective
exemplar
easy
math
asked
Dec 27, 2012
by
sreemathi.v
1
answer
If $A=\begin{bmatrix}0 & x\\x & 0\end{bmatrix},B=\begin{bmatrix}0 & 1\\1 & 0\end{bmatrix}\;and\;x^2=-1,then\;show\;that\;(A+B)^2=A^2+B^2.$
cbse
class12
ch3
q34
p57
short-answer
exemplar
sec-b
easy
math
asked
Dec 23, 2012
by
sreemathi.v
1
answer
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