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Recent questions tagged q25
Questions
If $5 \cos x +12 \cos y=13$, then the maximum value of $5 \sin x +12 \sin y$ is :
jeemain
eamcet
math
2006
q25
asked
Nov 6, 2013
by
meena.p
1
answer
Calculate the normality of the resulting solution made by adding 2drops(0.1ml) of 0.1N $H_2SO_4$ in 1litre of distilled water.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q25
easy
asked
Oct 31, 2013
by
sreemathi.v
1
answer
when acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that?
jeemain
eamcet
chemistry
2006
q25
asked
Oct 30, 2013
by
meena.p
1
answer
Match the appropriate pairs from List I and List II
jeemain
eamcet
physics
2006
q25
asked
Oct 29, 2013
by
meena.p
1
answer
A male branch of Funaria has ten antheridia and produced a sum total of 1400 spermatozoids. What is the number of androcyte mother cells in each antheridium assuming each of the antheridia has the same number of androcytes?
jeemain
eamcet
biology
2011
q25
asked
Oct 26, 2013
by
thanvigandhi_1
1
answer
If $\cos (A-B)=3/5$ and $\tan A \tan B=2$. then which one of the following is true?
jeemain
eamcet
math
2007
q25
asked
Oct 24, 2013
by
meena.p
1
answer
A compound of carbon ,hydrogen and nitrogen contains these elements in the ratio 9 : 1 : 3.5.Calculate the empirical formula.If its molecular mass is 108,what is the molecular formula ?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q25
medium
asked
Oct 24, 2013
by
sreemathi.v
1
answer
Which of the following is an example of interstitial hydride?
jeemain
eamcet
chemistry
2007
q25
asked
Oct 23, 2013
by
meena.p
1
answer
In Ramsden eyepiece , the planoconvex lenses each of focal length f are separated by a distance 12 cm. the equivalent focal length (in cm) of the eyepiece is
jeemain
eamcet
physics
2007
q25
asked
Oct 22, 2013
by
meena.p
1
answer
If $A=35^{\circ},B=15^{\circ}$ and $C=40^{\circ}$, then $tan A. \tan B+\tan B. \tan C+\tan C. \tan A=$
jeemain
eamcet
math
2008
q25
asked
Oct 17, 2013
by
meena.p
1
answer
The number of water molecules formed when ten electrons move from mitochondrial NADH molecules through the components of electron transport system to molecular oxygen is
jeemain
eamcet
biology
2012
q25
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
If in a $\Delta$ le $ABC,A=\large\frac{\pi}{4}$ and $\tan B\tan C=\alpha$ then the value of $\alpha$ lies in
jeemain
math
class11
ch3
trigonometric-functions
q25
trignometric-identities
medium
asked
Oct 15, 2013
by
sreemathi.v
1
answer
If $3 \cos x \neq 2 \sin x,$ then the general solution of $\sin ^2 x -\cos 2x=2 -\sin 2x$ is $x=$
jeemain
eamcet
math
2009
q25
asked
Oct 9, 2013
by
meena.p
1
answer
$\sin\large\frac{9\pi}{14}$$\sin\large\frac{11\pi}{14}$$\sin\large\frac{13\pi}{14}$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q25
trignometric-identities
easy
asked
Oct 7, 2013
by
sreemathi.v
1
answer
For a given material , The young's modulus is 2.4 times that of rigidity modulus. It's Poisson's ratio is ::
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q25
easy
asked
Oct 4, 2013
by
meena.p
1
answer
What is the ratio of ATP requirement for the fixation of 6 molecules of $CO_2$ in sugarcane and 5 molecules of $N_2$ in bean?
jeemain
eamcet
biology
2013
q25
asked
Oct 3, 2013
by
thanvigandhi_1
1
answer
The set of solution of the equation $(\sqrt 3-1) \sin \theta+(\sqrt 3+1) \cos \theta=2$ is :
jeemain
eamcet
math
2010
q25
asked
Sep 26, 2013
by
meena.p
1
answer
If $^{(n-1)} C_3+^{n-1} C_4 \;>\;^n C_3$, then the minimum value of $n$ is
jeemain
eamcet
math
2011
q25
asked
Sep 20, 2013
by
meena.p
1
answer
The set of solution of the system of equations: $x+y=\large\frac{2 \pi}{3}$ and $\cos x +\cos y=\large\frac{3}{2},$ where $x,y$ are real, is
jeemain
eamcet
math
2013
q25
asked
Sep 14, 2013
by
meena.p
1
answer
The condition for $ax^2+2cxy+by^2+2bx+2ay+c$ is resolvable into two linear factors, is ................
jeemain
eamcet
math
1991
fitb
q25
asked
Sep 13, 2013
by
meena.p
1
answer
If the pressure and the absolute temperature of a given mass of gas are doubled, the new volume will be ................ the initial volume.
jeemain
eamcet
chemistry
1991
fitb
q25
asked
Sep 12, 2013
by
meena.p
0
answers
Siemen is the SI unit for ............... .
jeemain
eamcet
physics
1991
fitb
q25
asked
Sep 11, 2013
by
meena.p
0
answers
Which of the following is best choice of reagents for the electrophilic iodination of an aromatic ring?
jeemain
chemistry
unit22
organic-chemistry
halogens
q25
medium
asked
Sep 4, 2013
by
sreemathi.v
1
answer
At what velocity in (km/s) should a body be projected horizontally at a height of 30 km from the ground so that it becomes the satellite of the earth? neglect air friction. (radius of earth is $6370 \;Km$)
jeemain
physics
class11
unit6
gravitation
q25
medium
asked
Aug 12, 2013
by
meena.p
1
answer
A pigeon in flight experiences a force of air resistance given by $F=bv^2$, where v is the flight speed and b is constant. What is maximum speed of pigeon if its power output is P
jeemain
physics
class11
unit4
work-power-energy
q25
medium
asked
Jul 18, 2013
by
meena.p
1
answer
An inclined plane is inclined at an angle $\theta$ when the block placed on it is just at the point of moving down the plane. What can be the minimum acceleration with which the block can be moved up the inclined plane.
jeemain
physics
class11
unit3
laws-of-motion
q25
medium
asked
Jul 8, 2013
by
meena.p
1
answer
Dimensionless quantity
jeemain
physics
class11
ch2
units-and-measurement
q25
easy
dimensional-formulae-and-analysis
asked
Jun 17, 2013
by
meena.p
1
answer
If $s=r^{3}-4t^{2}+7,$ the velocity when the acceleration is zero is
tnstate
class12
bookproblem
p231
objective
q25
sec-a
easy
modelpaper
oct-2006
mar-2007
oct-2009
asked
May 16, 2013
by
poojasapani_1
1
answer
The vectors $\overrightarrow{2i}+\overrightarrow{3j}+\overrightarrow{4k} $ and $\overrightarrow{ai}+\overrightarrow{bj}+\overrightarrow{ck}$ are perpendicular when
tnstate
class12
bookproblem
p266
objective
q25
modelpaper
jun-2007
asked
May 9, 2013
by
poojasapani_1
1
answer
The management committee of a residential colony decided to award some of its members (say x) for honesty,some (say y) for helping others and some others (say z) for supervising the workers to keep the colony neat and clean . The sum of all the awardees is 12. Three times the sum of awardees for cooperation and supervision added in two times the number of awardees for honesty is 33. If the sum of the number of awardees for honesty and supervision is twice the number of awardees for helping others, using matrix method, find the number of awardees of each category. Apart from these values, namely, honesty, cooperation and supervision, suggest one more value which the management of the colony must include for awards.
cbse
class12
modelpaper
2013
sec-c
q29
65-1
q27
65-2
q25
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
A manufacturer considers that man and women workers are equally efficient and so he pays them at the same rate.He has 30 and 17 units of workers(male and female) and capital respectively,which he uses to produce two types of goods A and B.To produce 1 unit of A,2 workers and 3 units of capital are required while 3 workers and 1 unit of capital is required to produce 1 unit of B.If A and B are priced at Rs100 and 120 per unit respectively,how should he use his resources to maximize the total revenue?Form the above as an LPP and solve graphically.Do you agree with this view of the manufacturer that men and women workers are equally efficient and so should be paid at the same rate?
cbse
class12
modelpaper
2013
sec-c
q28
65-1
q25
65-2
q24
65-3
math
asked
Mar 20, 2013
by
sreemathi.v
0
answers
Find the particular solution of the differential equation $(\tan^{-1}y-x)dy=(1+y^2)dx$,given that when x=0,y=0.
cbse
class12
modelpaper
2013
sec-c
q25
65-1
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
Three bags contain balls as shown in the table below. A bag is chosen at random and two balls are drawn from it. They happen to be white and red. What is the probability that they came from the III bag?
cbse
class12
modelpaper
2012
sec-c
q25
math
asked
Feb 15, 2013
by
thanvigandhi_1
0
answers
Find the area of the part of the circle $ x^2+y^2=16$ which is exterior to the parabola $y^2=6x$.
cbse
class12
modelpaper
2012
sec-c
q25
medium
ch8
math
asked
Feb 11, 2013
by
thanvigandhi_1
1
answer
Using integration, find the area of the region bounded by the parabola \( y^2=4x\) and the circle \( 4x^2+4y^2=9\)
cbse
class12
modelpaper
2012
sec-c
q25
medium
math
asked
Feb 10, 2013
by
thanvigandhi_1
1
answer
The slope of the tangent of any point on a curve is \( \lambda \) times the slope of the line joining the point of contact to the origin. Formulate the differential equation and hence find the equation of the curve.
cbse
class12
modelpaper
2012
sec-b
q25
medium
math
asked
Feb 9, 2013
by
thanvigandhi_1
1
answer
Evaluate : \( \int_1^3 (2x^2+3)dx\) as the limit of sums.
cbse
class12
modelpaper
2012
sec-c
q25
difficult
math
asked
Feb 8, 2013
by
thanvigandhi_1
1
answer
Evaluate : $\begin{align*} \int \frac{tan \: x+tan^3x}{1+tan^3x} \end{align*}$
cbse
class12
modelpaper
2012
sec-c
q25
difficult
math
asked
Feb 8, 2013
by
thanvigandhi_1
1
answer
Evaluate : $\int_0^{\Large\frac{\pi}{4}} \large\frac{\sin\: x.\cos\: x}{\cos^4x+sin^4x}$$dx $
cbse
class12
modelpaper
2012
sec-c
q25
medium
math
asked
Feb 8, 2013
by
thanvigandhi_1
1
answer
Evaluate : \[ \int_1^4 [ |x-1|+|x-2|+|x-3| ]dx \]
cbse
class12
modelpaper
2012
sec-c
q25
math
asked
Feb 8, 2013
by
thanvigandhi_1
0
answers
Find the area of a minor segment of the circle \( x^2+y^2=a^2\) cut off by the line \( x=\large \frac{a}{2}.\)
cbse
class12
modelpaper
2012
sec-c
q25
difficult
math
asked
Feb 7, 2013
by
thanvigandhi_1
1
answer
Prove that the image of the point (3,-2,1) in the plane \( 3x-y+4z=2\) lies on the plane \( x+y+z+4=0\).
cbse
class12
modelpaper
2012
sec-c
q25
medium
math
asked
Feb 6, 2013
by
thanvigandhi_1
1
answer
Using the method of integration, find the area of the region bounded by the lines : $ 2x+y=4 :3x-2y=6;x-3y+5=0$
cbse
class12
modelpaper
2012
sec-c
q25
math
asked
Feb 5, 2013
by
thanvigandhi_1
0
answers
A fair die is rolled. The probability that the first 1 occurs at even number of trails is?
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q25
p42
math
asked
Feb 5, 2013
by
meena.p
0
answers
A variable plane is at constant distance p from the origin and meet the axes in A, B & C. Show that the locus of the centroid of the tetrahedron $\bigtriangleup ABC\;is\; \Large\frac{1}{x^2}+\frac{1}{y^2}+\frac{1}{z^2}=\frac{16}{p^2}$
cbse
class12
additionalproblem
kvquestionbank2012
ch11
q25
p38
math
asked
Feb 5, 2013
by
meena.p
1
answer
If a, b & c are the lengths of the sides opposite respectively to the angles A, B & C of a $\bigtriangleup ABC,$ using vector method show that \[a)\cos A=\frac{b^2+c^2-a^2}{2bc} \qquad b)\;a=b\cos C+c \cos B.\]
cbse
class12
additionalproblem
kvquestionbank2012
ch10
q25
p36
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate : $ \int_{\Large\frac{\pi}{6}}^{\Large\frac{\pi}{3}}\large \frac{dx}{1+\sqrt{tan \: x}} $
cbse
class12
modelpaper
2012
sec-c
q25
math
asked
Feb 5, 2013
by
thanvigandhi_1
0
answers
Evaluate : $ \int \large\frac{6x+7}{\sqrt{(x-5)(x-4)}}$$dx $
cbse
class12
modelpaper
2012
sec-c
q25
difficult
math
asked
Feb 5, 2013
by
thanvigandhi_1
1
answer
NewtonÂ’s law of cooling states that the rate of change of the temperature T of an object is proportional to the difference between T and the (constant) temperature t of the surrounding medium. We can write it as \[\frac{dT}{dt}=-K(T-t),K>0\; constant.\]A cup of coffee is served at $ 185^\circ F$ in a room where the temperature is $65^\circ F .$ Two minutes later the temperature of the coffee has dropped to $155^\circ F.$(log 3/4=0.144, log3 = 1.09872). Find the time required for coffee to have $105^\circ F$ temperature.
cbse
class12
additionalproblem
kvquestionbank2012
ch9
q25
p34
sec-c
math
asked
Feb 4, 2013
by
meena.p
0
answers
Compute the area bounded by the lines $ x+2y=2,y-x=1\; and\;2x+y=7$
cbse
class12
additionalproblem
kvquestionbank2012
ch8
q25
p32
math
asked
Feb 4, 2013
by
meena.p
0
answers
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