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Recent questions tagged q31
ASK
Refer to the below equation :
jeemain
chemistry
unit21
organic-chemistry
q31
difficult
basic-organic-chemistry
class11
ch12
asked
Dec 5, 2013
by
sreemathi.v
1
answer
Salicornia is an example of :
jeemain
eamcet
biology
2001
q31
asked
Dec 1, 2013
by
thanvigandhi_1
0
answers
$NCl_3+H_2O\rightarrow NH_3+x,PCl_3+3H_2O\rightarrow H_3PO_3+y$.The $x$ and $y$ are :-
jeemain
chemistry
unit15
p-block-elements
q31
medium
asked
Nov 27, 2013
by
sreemathi.v
1
answer
The book 'Historia Plantarum' was written by :
jeemain
eamcet
biology
2000
q31
asked
Nov 25, 2013
by
thanvigandhi_1
0
answers
When ammonia is added to pure water, the concentration of which of the following species already present, will decrease
jeemain
chemistry
aipmt
equilibrium
medium
q31
biology
asked
Nov 23, 2013
by
mosymeow_1
1
answer
In Agaricus, during its development stages, the cells of the following, contains one nucleus
jeemain
eamcet
biology
1999
q31
asked
Nov 23, 2013
by
thanvigandhi_1
0
answers
The determinant $\begin{vmatrix}a&b&a\alpha+b\\b&c&b\alpha+c\\a\alpha+b&b\alpha+c&0\end{vmatrix}$ is equal to zero if
jeemain
math
ch4
class12
determinants
q31
properties-of-determinants
easy
asked
Nov 20, 2013
by
sreemathi.v
1
answer
$ABC$ is a $\Delta$le.Its area is 12sqcm and base is 6cm.The difference of base angle is $60^{\large\circ}$.If $A$ be the angle opposite to the base,then the value of $8\sin A-6\cos A$ is
jeemain
math
class11
ch3
trigonometric-functions
q31
angles
difficult
asked
Nov 18, 2013
by
sreemathi.v
1
answer
In a $\Delta ABC, a (\cos ^2 B+\cos^2 C)+ \cos A(c \cos C+b \cos B)$ is equal to :
jeemain
eamcet
math
2005
q31
asked
Nov 12, 2013
by
meena.p
1
answer
Arrange the following respiratory substrates in decreasing order of $ CO_2 $ molecules released when one molecule of each of them is oxidized.
jeemain
eamcet
biology
2010
q31
asked
Nov 11, 2013
by
thanvigandhi_1
0
answers
Which of the following is not correct ?
jeemain
eamcet
chemistry
2005
q31
asked
Nov 11, 2013
by
meena.p
0
answers
If $\overrightarrow a, \:\overrightarrow b,\: \overrightarrow c$ are position vectors of the points $A,B,C$ respectively, then under what condition the three points $A,B,C$ are collinear?
jeemain
math
class12
ch10
vector-algebra
easy
vector-product
q31
asked
Nov 10, 2013
by
rvidyagovindarajan_1
1
answer
A 6 V cell with $0.5 \Omega$ internal resistance, a 10 V cell with $1 \Omega$ internal resistance and a $12 \Omega$ external resistance are connected in parallel. The current (in ampere) through the 10 V cell is :
jeemain
eamcet
physics
2005
q31
asked
Nov 8, 2013
by
meena.p
1
answer
The angles of a triangle are in the ratio $3:5:10$.Then the ratio of the smallest side to the greatest side is :
jeemain
eamcet
math
2006
q31
asked
Nov 6, 2013
by
meena.p
1
answer
Identify the reaction for which $\Delta H= \Delta E$
jeemain
eamcet
chemistry
2006
q31
asked
Oct 30, 2013
by
meena.p
1
answer
One end of each of a resistance r capacitor C and resistance 2r are connected together. The other ends are respectively connected to the positive terminals of batteries, P, Q, R having respectively emf's E,E and 2E. The negative terminals of the batteries are then connected together. In this circuit, with steady current the potential drop across the capacitor is :
jeemain
eamcet
physics
2006
q31
asked
Oct 29, 2013
by
meena.p
1
answer
From among the following, identify the correct order of plants which exhibit hypogynous, perigynous and epigynous flowers respectively
jeemain
eamcet
biology
2011
q31
asked
Oct 27, 2013
by
thanvigandhi_1
1
answer
If two angles of $\Delta ABC$ are $45^{\circ}$ and $60^{\circ}$, then the ratio of the smallest and the greatest sides are
jeemain
eamcet
math
2007
q31
asked
Oct 25, 2013
by
meena.p
0
answers
Two oxides of a metal contain 50% and 40% of metal M respectively.If the formula of first oxide is MO,+ve formula of $2^{nd}$ oxide will be
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q31
medium
asked
Oct 24, 2013
by
sreemathi.v
1
answer
Which of the following biomolecules acts as specific catalysts in biological reaction ?
jeemain
eamcet
chemistry
2007
q31
asked
Oct 24, 2013
by
meena.p
1
answer
In a metre bridge experiment, the ratio of the left gap resistance to right gap resistance is $2:3$, the balance point from left is
jeemain
eamcet
physics
2007
q31
asked
Oct 23, 2013
by
meena.p
1
answer
If $\Delta ABC$ if $\large\frac{1}{b+c}+\frac{1}{c+a}=\frac{3}{a+b+c}$ then $C=$
jeemain
eamcet
math
2008
q31
asked
Oct 17, 2013
by
meena.p
1
answer
Study the following lists
jeemain
eamcet
biology
2012
q31
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
If $A$ and $B$ are positive acute angles and $\cos A=\large\frac{1}{7},$$\cos B=\large\frac{13}{14}$ then find $A-B$
jeemain
math
class11
ch3
trigonometric-functions
q31
trignometric-identities
medium
asked
Oct 16, 2013
by
sreemathi.v
1
answer
In a quadrilateral $ABCD,$ the point P divides DC in the ratio $1:2$ and Q is the mid point of AC.If $\overrightarrow {AB}+2 \overrightarrow {AD}+\overrightarrow {BC}-2 \overrightarrow {DC}=k \overrightarrow {PQ}$, then $k= $
jeemain
eamcet
math
2009
q31
asked
Oct 9, 2013
by
meena.p
1
answer
If $\sin\alpha=\sin\beta$ and $\cos\alpha=\cos\beta$ then
jeemain
math
class11
ch3
trigonometric-functions
trignometric-identities
q31
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
The number of stomata and epidermal cells in $ 1\: mm^2$ area of abaxial surface of the leaves of A, B, C and D plants are given below
jeemain
eamcet
biology
2013
q31
asked
Oct 4, 2013
by
thanvigandhi_1
0
answers
Two liquids which do not react chemically are placed in a bent tube as shown. The heights of liquids above their surface of separation (Common surface) are
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q31
easy
asked
Oct 4, 2013
by
meena.p
1
answer
Let $\overrightarrow {a}=\overrightarrow {i}- 2 \overrightarrow {j}+ 3 \overrightarrow {k},\; \overrightarrow {b}=2 \overrightarrow {i}+3 \overrightarrow {j}-\overrightarrow {k}$ and $\overrightarrow {c}= \lambda \overrightarrow {i}+\overrightarrow {j}+(2 \lambda -1) \overrightarrow {k}.$ If $\overrightarrow {c}$ is parallel to the plane containing $\overrightarrow {a},\overrightarrow {b} $ then $\lambda=$
jeemain
eamcet
math
2010
q31
asked
Sep 26, 2013
by
meena.p
1
answer
The value of $'\alpha'$ for which the equation $x^3+ax+1=0$ and $x^4+ax^2+1=0$ have a common root is
jeemain
eamcet
math
2011
q31
asked
Sep 20, 2013
by
meena.p
1
answer
The points whose position vectors are $2 \overrightarrow {i}+3 \overrightarrow {j}+4 \overrightarrow {k},\; 3 \overrightarrow {i}+4\overrightarrow {j}+2 \overrightarrow {k}$ and $4 \overrightarrow {i}+2 \overrightarrow {j}+3 \overrightarrow {k}$ are the verticies of
jeemain
eamcet
math
2013
q31
asked
Sep 16, 2013
by
meena.p
1
answer
Among the $SO_2,H_2SO_4$ and sodium thiosuphate, sulphur has the highest oxidation state in .............. .
jeemain
eamcet
chemistry
1991
fitb
q31
asked
Sep 12, 2013
by
meena.p
0
answers
The feasible region for an LPP is shown in the figure below ( fig 12.13 in textbook ).Let $F=3x-4y$ be the objective function.Minimum value of $F$ is
cbse
class12
ch12
q31
p255
objective
exemplar
sec-a
easy
math
asked
Aug 21, 2013
by
sreemathi.v
1
answer
By what percent the energy of satallite has to be increased to shift it from an orbit of radius r to $\large\frac{3}{2}$$r$
jeemain
physics
class11
unit6
gravitation
q31
medium
asked
Aug 20, 2013
by
meena.p
1
answer
Ball 1 collides with an another identical ball 2 at rest For what values of coefficient of restitution e the velocity of 2nd ball becomes two times of ball 1 after collision?
jeemain
physics
class11
ch6
work-power-energy
q31
easy
collisions
coefficient-of-restitution
asked
Jul 19, 2013
by
meena.p
1
answer
A man is standing stationary with respect to a horizontal conveyor belt that is accelerating with $1 m/s^2$. What is the net force on the man if the coefficient of static friction between man's shoes and belt is 0.2, upto what acceleration of belt can the man continue to be stationary relative to the belt? Mass of man$=65 kg; g=9.8 m/s^2$
jeemain
physics
class11
unit3
laws-of-motion
q31
difficult
asked
Jul 8, 2013
by
meena.p
1
answer
If $m$ is mass, $'Q'$ is charge and $B$ is magnetic induction $\large\frac{m}{BQ}$ has same dimension as
jeemain
physics
class11
ch2
units-and-measurement
q31
easy
dimensional-formulae-and-analysis
asked
Jun 18, 2013
by
meena.p
1
answer
$\;\lim \limits_{x \to \infty}\large\frac{x^{2}}{e^{x}}$ is
tnstate
class12
bookproblem
p232
objective
q31
modelpaper
oct-2007
oct-2008
asked
May 18, 2013
by
poojasapani_1
1
answer
The projection of $\overrightarrow{OP}$ on a unit vector $\overrightarrow{OQ}$ equals thrice the area of parallelogram $OPRQ$. Then $\angle{POQ}$ is
tnstate
class12
bookproblem
p267
objective
q31
asked
May 10, 2013
by
poojasapani_1
0
answers
A man is known to speak truth 3 times out of 4. He throws a dice and reports that it is a six. Find the probability that it is actually a six.
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q31
p42
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate:\[\int 3^{-2x}e^{-2x}dx\]
cbse
class12
additionalproblem
kvquestionbank2012
ch7
q31
p26
math
asked
Feb 2, 2013
by
meena.p
0
answers
A cone is circumscribed about a sphere of radius r. Show that the volume of the cone is maximum when its semi vertical angle is $\sin^{-1}\bigg(\Large\frac{1}{3}\bigg)$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q31
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Given that $ \cos \frac{x}{2}.\cos \frac{x}{4}.\cos \frac{x}{8}.......=\Large\frac {\sin x}{x},$ \[Prove\;that\;\frac{1}{2^2}\sec^2\frac{x}{2}+\frac{1}{2^4}\sec^2\frac{x}{4}+.......=cosec^2x-\frac{1}{x^2}\]
cbse
class12
additionalproblem
kvquestionbank2012
ch5
q31
p13
difficult
math
sec-a
asked
Jan 25, 2013
by
meena.p
1
answer
If $P(a)=\begin{bmatrix} \cos a & -\sin a & 0 \\ \sin a & \cos a & 0 \\ 0 & 0 & 1 \end{bmatrix}$then show that $[P(x)]^{-1}=[P(-x)]$
cbse
class12
additionalproblem
kvquestionbank2012
ch3
q31
p9
math
sec-b
asked
Jan 24, 2013
by
meena.p
0
answers
Find the equation of a curve passing through origin if the slope of the tangent to the curve at any point $(x,y)$ is equal to the square of the difference of the abscissa and the ordinate of the point.
cbse
class12
ch9
sec-b
q31
p195
exemplar
medium
math
asked
Jan 18, 2013
by
sreemathi.v
1
answer
If $\overrightarrow{a},\overrightarrow{b},\overrightarrow{c}$ are three vectors such that $\mid\overrightarrow{a}+\overrightarrow{b}+\overrightarrow{c}\mid=0$ and $\mid\overrightarrow{a}\mid=.2, \mid\overrightarrow{b}\mid=3,\mid\overrightarrow{c}\mid=5$,then value of $\overrightarrow{a}.\overrightarrow{b}+\overrightarrow{b}.\overrightarrow{c}+\overrightarrow{c}.\overrightarrow{a}$ is
cbse
class12
ch10
q31
p218
exemplar
easy
sec-a
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
The area of the region bounded by the ellipse $\large\frac{x^2}{25}+\frac{y^2}{16}=1$ is \begin{array}{1 1}(A)\;2 \pi sq.units & (B)\;20{\pi}^2 sq.units\\(C)\;16{\pi}^2 sq.units & (D)\;25\pi sq.units \end{array}
cbse
class12
ch8
q31
p178
objective
exemplar
sec-b
medium
math
asked
Jan 16, 2013
by
sreemathi.v
1
answer
Evaluate the following:$\int\limits_1^2\frac{dx}{\sqrt{(x-1)(2-x)}}$
cbse
class12
ch7
q31
p165
short-answer
exemplar
sec-b
medium
math
asked
Jan 14, 2013
by
sreemathi.v
1
answer
If the sum of the surface areas of cube and a sphere is constant.What is the ratio of an edge of the cube to the diameter of the sphere,when the sum of their volumes is minimum?
cbse
class12
ch6
q31
p138
exemplar
difficult
sec-c
math
asked
Jan 11, 2013
by
sreemathi.v
1
answer
A factory produces bulbs,The probability that any one bulb is defective is $\Large \frac{1}{50}$ and they are packed in boxes of 10.From a single box,find the probability that\begin{array}{1 1}(i)\;none\;of\;the\;bulbs\;is \;defective.\\(ii)\;exactly\;two\;bulbs\;are\;defective\\(iii)\;more\;than\;8\;bulbs\;work\;properly\end{array}
cbse
class12
ch13
q31
p275
short-answer
exemplar
sec-a
easy
math
asked
Jan 9, 2013
by
sreemathi.v
1
answer
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