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Recent questions tagged q19
Questions
The purple colour formed in the petioles and veins of tomato plants during nitrogen deficiency is due to :
jeemain
eamcet
biology
2000
q19
asked
Nov 24, 2013
by
thanvigandhi_1
0
answers
The stele in the root of the following is tetrach
jeemain
eamcet
biology
1999
q19
asked
Nov 22, 2013
by
thanvigandhi_1
0
answers
If $A$ and $B$ are square matrices of the same order and $AB=3I$ then $A^{-1}$ is equal to
jeemain
math
class12
ch3
matrices
transpose-of-a-matrix
q19
medium
asked
Nov 22, 2013
by
sreemathi.v
1
answer
If the system of equations :$x-ky-z=0,kx-y-z=0,x+y-z=0$ has a non zero solutions then the possible value of k are
jeemain
math
ch4
class12
determinants
q19
system-of-linear-equations
easy
asked
Nov 20, 2013
by
sreemathi.v
1
answer
If $\beta_1, \beta_2$ and $\beta_3$ are stepwise formation constants of $MCl, MCl_2, MCl_3$ and K is the overall formation constants of $MCl_3$, then (charges ommitted) :
jeemain
aipmt
chemistry
equilibrium
medium
q19
biology
asked
Nov 15, 2013
by
mosymeow_1
1
answer
If 4 moles of an ideal monoatomic gas at temperature $400 \;K$ is mixed with 2 moles of another ideal monoatomic gas at temperature $700\;K$ the temperature of the mixture is :
jeemain
eamcet
physics
2004
q19
asked
Nov 13, 2013
by
meena.p
1
answer
adj $\begin {bmatrix} 1 & 0 & 2 \\ -1 & 1 &-2 \\ 0 & 2 & 1 \end {bmatrix}=\begin {bmatrix} 5 & a & -2 \\ 1 & 1 &0 \\ -2 & -2 & b \end {bmatrix}$ then $[a \quad b]$ is equal to :
jeemain
eamcet
math
2005
q19
asked
Nov 11, 2013
by
meena.p
1
answer
Study the following lists
jeemain
eamcet
biology
2010
q19
asked
Nov 10, 2013
by
thanvigandhi_1
0
answers
x grams of calcium carbonate was completely burnt in air. The weight of the solid residue formed is 28 g. What is the value of x (in grams)?
jeemain
eamcet
chemistry
2005
q19
asked
Nov 8, 2013
by
meena.p
0
answers
The tyre of a motor car contains air at $15^{\circ}C$. If the temperature increases to $35^{\circ}C$ the approximate percentage increase in pressure is (ignore to expansion of tyre):
jeemain
eamcet
physics
2005
q19
asked
Nov 7, 2013
by
meena.p
1
answer
$\begin {bmatrix} \log\;e & \log\;e^2 & \log\;e^3 \\ \log\;e^2 & \log\;e^3 & \log\;e^4 \\ \log \;e^3 & \log\;e^4 & \log \;e^5 \end {bmatrix}$ is equal to:
jeemain
eamcet
math
2006
q19
asked
Nov 5, 2013
by
meena.p
1
answer
If $\overrightarrow a\;and\:\overrightarrow b$ are unit vectors and if vectors $\overrightarrow c=\overrightarrow a+2\overrightarrow b$ and $\overrightarrow d=5\overrightarrow a-4\overrightarrow b$ are $\perp$ to each other, then the angle between $\overrightarrow a\;and\:\overrightarrow b$ is ?
jeemain
math
class12
ch10
vector-algebra
medium
vector-product
q19
asked
Nov 4, 2013
by
rvidyagovindarajan_1
1
answer
The rate constant of a first order reaction at $27^{\circ}$ is $10^{-3} \min ^{-1})$. The temperature coefficient of this reaction is 2. What is the rate constant $ (in min^{-1})$ at $17^{\circ}C$ for this reaction ?
jeemain
eamcet
chemistry
2006
q19
asked
Oct 30, 2013
by
meena.p
1
answer
A plant virus is found to consist of uniform cylindrical particles of 150A in diameter and 5000A long.The specific volume of the virus is $0.75cm^3/g$.If the virus is considered to be a single particle and its molecular weight
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
atomic-and-molecular-masses
q19
easy
asked
Oct 30, 2013
by
sreemathi.v
1
answer
The cyclic process ABCD is shown below in the given P.V diagram. In the following answers the one that represents the same process as in the P-V diagram
jeemain
eamcet
physics
2006
q19
asked
Oct 29, 2013
by
meena.p
1
answer
Identify the following plants with reference to the number of phloem strands in their roots :
jeemain
eamcet
biology
2011
q19
asked
Oct 26, 2013
by
thanvigandhi_1
1
answer
If A is a square matrix such that $A(adj \;A)=\begin {bmatrix} 4 & 0 & 0 \\ 0 & 4 & 0 \\ 0 & 0 & 4 \end {bmatrix}$, then det (adj A) $ is equal to
jeemain
eamcet
math
2007
q19
asked
Oct 24, 2013
by
meena.p
1
answer
Hybridisation of oxygen in diethyl ether is
jeemain
eamcet
chemistry
2007
q19
asked
Oct 23, 2013
by
meena.p
1
answer
Hydrogen and oxygen are combined in the ratio 1 : 16 by mass in hydrogen peroxide.Calculate the percentage of hydrogen and oxygen in hydrogen peroxide.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q19
medium
asked
Oct 23, 2013
by
sreemathi.v
1
answer
Two cylinders A and B fitted with pistons, contain equal number of moles of an ideal monoatomic gas at 400 K. The piston of a is free move while that of B is held fixed. Same amount of heat energy is given to the gas in each cylinder. If the rise in temperature of the gas in A is 42 K. the rise in temperature of the gas in B is $(\gamma=5/3)$
jeemain
eamcet
physics
2007
q19
asked
Oct 22, 2013
by
meena.p
1
answer
The angles $A,B$ and $C$ of a triangle ABC are in arithmetic progression.If $2b^2=3C^2$ determine the angle A
jeemain
math
class11
ch3
trigonometric-functions
q19
angles
difficult
asked
Oct 21, 2013
by
sreemathi.v
1
answer
The inverse of the matrix $\begin {bmatrix} 7 & -3 & -3 \\ -1 & 1 & 0 \\ -1 & 0 & 1 \end{bmatrix} $ is :
jeemain
eamcet
math
2008
q19
asked
Oct 17, 2013
by
meena.p
1
answer
W.L. Johannsen conducted pure line selection experiments on one of the bean varieties. Which of the following characters are associated with this plant?
jeemain
eamcet
biology
2012
q19
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
If $\alpha,\beta,\gamma,\delta$ are the solutions of the equation $\tan\big(\theta+\large\frac{\pi}{4}\big)=$$3\tan 3\theta$,no two of which have equal tangents,then the value of $\tan\alpha+\tan\beta+\tan\gamma+\tan\delta$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q19
trignometric-equations
medium
asked
Oct 15, 2013
by
sreemathi.v
1
answer
If $\alpha$ and $\beta$ are the roots of $x^2-2x+4=0,$ then the value of $\alpha ^6+\beta ^6$ is :
jeemain
eamcet
math
2009
q19
asked
Oct 9, 2013
by
meena.p
1
answer
If $\sin x+\sin^2 x=1$ then the value of $\cos^2x+3\cos^{10}x+3\cos^8 x+\cos^6x$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q19
trignometric-identities
easy
asked
Oct 7, 2013
by
sreemathi.v
1
answer
Excess pressure inside one soap bubble is three times that inside second soap bubble. Find the ratio of volume of first bubble to second.
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q19
medium
asked
Oct 3, 2013
by
meena.p
1
answer
Study the following and identify the correct pair of characters for Physalis
jeemain
eamcet
biology
2013
q19
asked
Oct 3, 2013
by
thanvigandhi_1
1
answer
$z=1+i \sqrt 3=>|Arg z|+|Arg \bar {z}|=$
jeemain
eamcet
math
2010
q19
asked
Sep 26, 2013
by
meena.p
1
answer
If $f:[2, \infty) \to B$ defined by $f(x)=x^2-4x+5$ is a bijection, then B=
jeemain
eamcet
math
2011
q19
asked
Sep 20, 2013
by
meena.p
1
answer
$\bigg(\large\frac{1+i}{1-i}\bigg)^4+\bigg(\frac{1-i}{1+i}\bigg)^4=$
jeemain
eamcet
math
2013
q19
asked
Sep 14, 2013
by
meena.p
1
answer
$^{14}C_4+ \sum \limits_ {j=1}^4\; ^{18-j}C_3$=................ .
jeemain
eamcet
math
1991
fitb
q19
asked
Sep 13, 2013
by
meena.p
0
answers
The vector area of triangle whose two sides are given by $2 \hat {i}-7 \hat {j}+\hat {k} $ and $ 4 \hat j -3 \hat k$ is :
jeemain
eamcet
math
1991
q19
asked
Sep 13, 2013
by
meena.p
1
answer
The reagent that has action on glass is :
jeemain
eamcet
chemistry
1991
q19
asked
Sep 11, 2013
by
meena.p
1
answer
To minimize spherical aberration two lenses of focal length $\mathit{f_1}\;$ and $\mathit{f_2}\;$ are placed with a distance of separation equal to .................. .
jeemain
eamcet
physics
1991
fitb
q19
asked
Sep 11, 2013
by
meena.p
0
answers
When a material is placed in magnetic field B but opposite in direction is reduced. The material is:
jeemain
eamcet
physics
1991
q19
asked
Sep 10, 2013
by
meena.p
1
answer
Arrange the following nucleophiles in the order of the nucleophilicity in protic solvents $SH^-,OAC^-,PHO^-,OH^-,H_2O$
jeemain
chemistry
unit22
organic-chemistry
halogens
q19
medium
asked
Sep 3, 2013
by
sreemathi.v
1
answer
A particle of mass 10 g is kept on surface of a uniform sphere of mass 100 kg and radius 10 cm. Find the work done against gravitational force between them, to take the particle for away from sphere $(G=6.67 \times 10^{-11} Nm^2/kg)$
jeemain
physics
class11
unit6
gravitation
q19
medium
asked
Aug 10, 2013
by
meena.p
1
answer
A body of mass 10 kg at rest is acted upon simultaneously by two forces 4N and 3N at right angles to each other. The kinetic energy of body at end of 10sec is
jeemain
physics
class11
ch6
kinetic-energy
work-power-energy
q19
easy
asked
Jul 18, 2013
by
meena.p
1
answer
A boy standing on a weighing machine observe his weight to be $200 N$. when he suddenly jumps upwards, his friend notice that the reading increased to $400 N$. The acceleration with which the boy jumped will be
jeemain
physics
class11
unit3
laws-of-motion
q19
easy
asked
Jul 5, 2013
by
meena.p
1
answer
Pick the odd one out -
jeemain
physics
class11
ch1
units-and-measurement
q19
easy
international-system-of-units
asked
Jun 17, 2013
by
meena.p
1
answer
If the volume of an expanding cube is increasing at the rate of $4cm^{3}/sec $ then the rate of change of surface area when the volume of the cube is $8$ cubic cm is
tnstate
class12
bookproblem
p231
objective
q19
sec-a
medium
asked
May 16, 2013
by
poojasapani_1
1
answer
If the equation $-2x+y+z=i\;;x-2y+z=m\;;x+y-2z=n$ such that $i+m+n=0,$ then the system has
tnstate
class12
bookproblem
p265
objective
q19
modelpaper
mar-2006
jun-2006
asked
May 8, 2013
by
poojasapani_1
1
answer
Prove that $\begin{bmatrix} x+y & x & x \\ 5x+4y & 4x & 2x \\ 10x+8y & 8x & 3x \end{bmatrix}=x^3$
cbse
class12
ch4
b
modelpaper
q19
medium
math
asked
Apr 3, 2013
by
meena.p
1
answer
Using vectors,find the area of triangle ABC,whose vertices are $A(1,2,3),B(2,-1,4),C(4,5,-1).$
cbse
class12
modelpaper
2013
sec-b
q19
65-3
math
asked
Mar 22, 2013
by
sreemathi.v
1
answer
If $x^y=e^{x-y}$,prove that $\Large \frac{dy}{dx}=\frac{log x}{(1+log x)^2}$
cbse
class12
modelpaper
2013
sec-b
q19
65-2
math
asked
Mar 22, 2013
by
sreemathi.v
1
answer
Evaluate :$\int\limits_0^{2{\pi}}\large\frac{1}{1+e^{sin x}}$$dx$
cbse
class12
modelpaper
2013
sec-b
q19
65-1
q14
65-3
medium
math
asked
Mar 20, 2013
by
sreemathi.v
1
answer
Evaluate : \[ \frac{e^x}{\sqrt{5-4e^x-e^{2x}}}dx\]
cbse
class12
modelpaper
2012
sec-b
q19
math
asked
Feb 15, 2013
by
thanvigandhi_1
0
answers
Evaluate : $ \int \large\frac{(x-4)e^x}{(x-2)^3}$$dx $
cbse
class12
modelpaper
2012
sec-b
q19
easy
math
asked
Feb 15, 2013
by
thanvigandhi_1
1
answer
Evaluate : $ \int \large\frac{8\: dx}{(x+2)(x^2+4)}$
cbse
class12
modelpaper
2012
sec-b
q19
difficult
math
asked
Feb 15, 2013
by
thanvigandhi_1
1
answer
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