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Recent questions tagged q50
Questions
The smog is essentially caused by presence of
jeemain
chemistry
class11
environmental-chemistry
unit14
q50
medium
asked
Jan 21, 2014
by
sreemathi.v
1
answer
Probability of getting positive integral roots of the equation $ x^2-n=0$ for the integer $ n \: \: \: 1 \leq n \leq 40$ is
jeemain
math
cbse
class12
ch13
probability
events
easy
q50
asked
Jan 16, 2014
by
thanvigandhi_1
1
answer
The quantum number that does not describe the distance and the angular disposition of the electron
sat
atomic-structure
jeemain
chemistry
physical-chemistry
class11
unit2
quantum-mechanical-model
q50
easy
asked
Jan 13, 2014
by
sreemathi.v
1
answer
An ore contains 2.0% by weight of the mineral argentive $(Ag_2S)$.How much of ore should be taken to produce 1.0g pure Ag?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
laws-of-chemical-combinations
q50
easy
asked
Jan 9, 2014
by
sreemathi.v
1
answer
The sum of three numbers in GP is 26. If 2,2,-6 are added to them respectively they form as.n AP . Find the number
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q50
asked
Jan 3, 2014
by
yamini.v
1
answer
The distance of the point $(-1,2,6)$ from the line through the point $(2,3,-4)$ along the vector $6\hat i+3\hat j-4\hat k$ is ?
jeemain
math
class12
ch11
3d-geometry
equations-of-lines
easy
q50
asked
Jan 3, 2014
by
rvidyagovindarajan_1
1
answer
$\lim\limits_{n\to \infty}\sum\limits_{r=1}^n\large\frac{\pi}{n}$$\sin\large\frac{\pi r}{n}$ is
jeemain
math
class12
ch7
integrals
definite integrals
easy
q50
asked
Dec 24, 2013
by
sreemathi.v
1
answer
Integrate: $Un =\int \limits_0^{\large\frac{\pi}{4}} \tan ^n x dx$, find $U_n+U_{n-2}$
jeemain
math
class12
ch7
integral-calculus
integration-by-parts
medium
q50
asked
Dec 16, 2013
by
meena.p
1
answer
A p-n photodiode is made of a material with a band gap of 2.0eV. The minimum frequency of the radiation that can be absorbed by the material is nearly :
aipmt
modelpaper
physics
2008
q50
asked
Dec 16, 2013
by
thanvigandhi_1
0
answers
The EMF of cell $Ag,AgCl$ in 0.1M $KCl\parallel sat\;NH_4NO_3\parallel 0.1M\;AgNO_3,Ag$ is $0.45\;volt$ at $25^oC$.Calculate solubility product & solubility of $AgCl(0.1M\; KCl$ is $85\% $dissociated & $0.1M$ $AgNO_3$ is $82\%$ dissociated)
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q50
difficult
asked
Dec 12, 2013
by
sreemathi.v
1
answer
Kryotype means a :
jeemain
eamcet
biology
2002
q50
asked
Dec 9, 2013
by
thanvigandhi_1
0
answers
The part of the chromosome beyond the secondary constriction is known as
jeemain
eamcet
biology
2001
q50
asked
Dec 2, 2013
by
thanvigandhi_1
1
answer
Hydrolysis of chloroform with aqueous KOH gives
jeemain
chemistry
unit15
p-block-elements
q50
medium
asked
Nov 28, 2013
by
sreemathi.v
1
answer
If $K_1$ and $K_2$ are respective equilibrium constants of two reactions: $XeF_6 (g) + H_2O(g) \rightleftharpoons XeOF_4 (g) + 2HF(g)$ and $XeO_4 (g) + XeF_6(g) \rightleftharpoons XeOF_4 (g) + 2XeO_3F_2(g)$ Then equilibrium constant for the reaction $XeO_4(g) + 2HF(g) \rightleftharpoons XeO_3F_2(g) + H_2O(g)$ will be
jeemain
aipmt
chemistry
equilibrium
difficult
q50
biology
asked
Nov 27, 2013
by
mosymeow_1
1
answer
The sderenchymatous part of the pericycd which gives mechanical support is called : "
jeemain
eamcet
biology
2000
q50
asked
Nov 26, 2013
by
thanvigandhi_1
0
answers
The following is a constituent of nitrogenase
jeemain
eamcet
biology
1999
q50
asked
Nov 23, 2013
by
thanvigandhi_1
0
answers
Inverse of $\begin{bmatrix}1&2&3\\2&3&4\\3&4&6\end{bmatrix}$ is
jeemain
math
class12
ch4
matrices-and-determinants
q50
adjoint-and-inverse
easy
asked
Nov 21, 2013
by
sreemathi.v
1
answer
If $\overrightarrow a\:and\:\overrightarrow c$ are unit and collinear vectors and $|\overrightarrow b|=6$, then $\overrightarrow b-3\overrightarrow c=\lambda \overrightarrow a,$ if $\lambda=?$
jeemain
math
class12
ch10
vector-algebra
difficult
scalar-product
q50
asked
Nov 19, 2013
by
rvidyagovindarajan_1
1
answer
If $x\sin^3\theta+y\cos^3\theta=\sin\theta\cos\theta$ and $x\sin\theta=y\cos\theta$ then $x^2+y^2$ is
jeemain
math
class11
ch3
trigonometric-functions
q50
trignometric-equations
medium
asked
Nov 15, 2013
by
sreemathi.v
1
answer
Match the following
jeemain
eamcet
biology
2010
q50
asked
Nov 13, 2013
by
thanvigandhi_1
0
answers
The product of the perpendicular distances from the origin on the pair of straight lines $12x^2+25xy+12y^2+10x+11y+z=0$ is :
jeemain
eamcet
math
2005
q50
asked
Nov 12, 2013
by
meena.p
1
answer
If OA is equally inclined to OX,OY and OZ and if A is $\sqrt 3 $ units from the origin . then A is :
jeemain
eamcet
math
2006
q50
asked
Nov 6, 2013
by
meena.p
1
answer
If the lines $x^2+2xy-35y^2-4x+44y-12=0$ and $5x+\lambda y-8=0$ are concurrent, then the value of $\lambda$ is
jeemain
eamcet
math
2007
q50
asked
Oct 25, 2013
by
meena.p
1
answer
If half mole of oxygen combine with Al to form $Al_2O_3$,the weight of Al used in the reaction is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q50
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
What type of practice is applied for culture of ' cat fish '?
jeemain
eamcet
biology
2012
q50
asked
Oct 18, 2013
by
thanvigandhi_1
1
answer
A pair of perpendicular straight lines passes through the origin and also through the point of intersection of the curve $x^2+y^2=4$ with $x+y=a$. The set containing the value of 'a' is
jeemain
eamcet
math
2008
q50
asked
Oct 17, 2013
by
meena.p
1
answer
The locus of center of a circle which passes through the origin and cuts off a length of 4 units from the line $x=3$ is :
jeemain
eamcet
math
2009
q50
asked
Oct 10, 2013
by
meena.p
1
answer
The value of the expression $(\sqrt 3\sin 75^{\large\circ}-\cos 75^{\large\circ})$ is
jeemain
math
class11
ch3
trigonometric-functions
q50
angles
easy
asked
Oct 9, 2013
by
sreemathi.v
1
answer
A cylindrical vessel filled upto a height at the bottom of the vessel. Area of hole is $\bigg(\large\frac{1}{100}\bigg)$ that of the area of vessel is maintained at 2 m . What is the time required to empty water equal to volume of water initially present in the vessel.
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q50
medium
asked
Oct 8, 2013
by
meena.p
1
answer
Identify the typical dental formula of a Metatherian
jeemain
eamcet
biology
2013
q50
asked
Oct 5, 2013
by
thanvigandhi_1
1
answer
If the lengths of tangents drawn to the circles :$x^2+y^2-8x+40=0; 5x^2+5y^2-25x+80=0;x^2+y^2-8x+16y+160=0$ from the point P are equal, then P=
jeemain
eamcet
math
2010
q50
asked
Sep 27, 2013
by
meena.p
1
answer
If the vector $\bar {i}-2x \bar {j}-3 y \bar{k}$ and $\bar {i}+3 x \bar{ j}+2 y \bar {k}$ are orthogonal to each other, then the locus of the point $(x,y)$ is
jeemain
eamcet
math
2011
q50
asked
Sep 23, 2013
by
meena.p
1
answer
For the given circle $C$ with the equation $x^2+y^2-16x -12y +64=0$ match the list -I with the list II given below:
jeemain
eamcet
math
2013
q50
asked
Sep 16, 2013
by
meena.p
1
answer
Nucleides having different mass number and different atomic number, but the same number of neutrons are called ...................... .
jeemain
eamcet
chemistry
1991
fitb
q50
asked
Sep 12, 2013
by
meena.p
1
answer
A geo stationary satellite orbits around the earth in a circular orbit of radius $36000km$. Then the time period of a spy satellite orbiting a few Kilometers above the earth's surface $(R_{earth}=6400 Km)$ will be approximately
jeemain
physics
class11
unit6
gravitation
q50
medium
asked
Aug 22, 2013
by
meena.p
1
answer
A particle of mass 2 kg moves on a horizontal plane under the action of force $F=(2 \hat i+2 \hat j)N$. The body is displaced from (0,0) to (1m,1m) If the initial speed of the particle is 2m/s find its final speed
jeemain
physics
class11
unit4
work-power-energy
q50
easy
asked
Jul 22, 2013
by
meena.p
1
answer
A system consists of three blocks A,B and C arranged as shown. The system is pushed by a force as shown in figure. All surfaces are smooth except between B and C,where coefficient of friction is $\mu$. Minimum value of F to prevent block B from slipping downward is
jeemain
physics
class11
unit3
laws-of-motion
q50
medium
asked
Jul 10, 2013
by
meena.p
1
answer
Value of acceleration due to gravity is $ 9.8 m/s^2$. Find its value in $km/hr^2$
jeemain
physics
class11
ch2
units-and-measurement
q50
medium
measurement-of-length-mass-time
asked
Jun 19, 2013
by
meena.p
1
answer
Identify the true statements in the following:
tnstate
class12
bookproblem
p234
objective
q50
asked
May 20, 2013
by
poojasapani_1
1
answer
The point of intersection of the lines $\overrightarrow{r}=(-\overrightarrow{i}+\overrightarrow{2j}+\overrightarrow{3k})+\overrightarrow{t}=(-\overrightarrow{2i}+\overrightarrow{j}+\overrightarrow{k}) $ and $\overrightarrow{r}=(\overrightarrow{2i}+\overrightarrow{3j}+\overrightarrow{5k})+\overrightarrow{s}=(\overrightarrow{i}+\overrightarrow{2j}+\overrightarrow{3k}) $ is
tnstate
class12
bookproblem
p270
objective
q50
modelpaper
oct-2006
asked
May 11, 2013
by
poojasapani_1
1
answer
A random variable X has probability distribution P(X) of the following form where K is some number. \[P(X)= \left\{ \begin{array}{1 1} k & \quad if & \quad x=0 \\ 2k & \quad if & \quad x=1 \\3k & \quad if & \quad x=0 \\0 & \qquad otherwise \end{array} \right.\]\[Find\;(1)\;K\qquad(2)\;p(x>2)\]
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q50
p43
sec-a
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate:\[\int \frac {\sin ^{-1}\sqrt x-\cos ^{-1} \sqrt x}{\sin ^{-1}\sqrt x+\cos ^{-1} \sqrt x}dx\]
cbse
class12
additionalproblem
kvquestionbank2012
ch7
q50
p27
math
asked
Feb 3, 2013
by
meena.p
0
answers
Show that the rectangle of maximum area that can be inscribed in a circle of radius 'r' cms is a square of side $\sqrt 2 r$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q50
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Verify the Rolles Theorem for the function $ f(x)=\sin x- \cos x, $in the interval $ \bigg[\Large\frac{\pi}{4},\frac{5\pi}{4}\bigg]$
cbse
class12
additionalproblem
kvquestionbank2012
ch5
q50
p15
easy
math
asked
Jan 28, 2013
by
meena.p
1
answer
For any square matrix verify A(adj A) = |A|I
cbse
class12
additionalproblem
kvquestionbank2012
ch3
q50
p10
math
sec-b
asked
Jan 24, 2013
by
meena.p
0
answers
The general solution of $e^x\cos y\;dx-e^x\sin y\;dy=0$ is:\begin{array}{1 1}(A)\;e^x\cos y=c & (B)\;e^x\sin y=c\\(C)\;e^x=c\;\cos y & (D)\;e^x=c\;\sin y\end{array}
cbse
class12
ch9
sec-a
q50
p197
objective
exemplar
easy
math
asked
Jan 18, 2013
by
sreemathi.v
1
answer
$ \int\tan^{-1}\sqrt x$ is equal to which of the following options:
cbse
class12
ch7
q50
p166
objective
exemplar
sec-b
medium
math
asked
Jan 15, 2013
by
sreemathi.v
1
answer
Which of the following functions is decreasing on $\bigg(0,\frac{1}{2}\bigg)$
cbse
class12
ch6
q50
p140
objective
exemplar
easy
sec-a
math
asked
Jan 11, 2013
by
sreemathi.v
1
answer
The probability distribution of a discrete random variable X is given as under:
cbse
class12
ch13
q50
p278
exemplar
sec-b
medium
math
asked
Jan 9, 2013
by
sreemathi.v
1
answer
If $x=a\sin 2t(1+\cos 2t)\;and\;y=b\cos 2t(1-\cos 2t),show\;that\bigg(\large \frac{dy}{dx}\bigg)_{at\;t=\frac{\pi}{4}}=\frac{-b}{a}$
cbse
class12
ch5
q50
p110
short-answer
exemplar
sec-b
difficult
math
asked
Dec 31, 2012
by
sreemathi.v
1
answer
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