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Recent questions tagged q44
Questions
Which one of the following has an optical isomer
jeemain
chemistry
class12
coordination-compounds
unit9
q44
sec-a
medium
asked
Feb 3, 2014
by
sreemathi.v
1
answer
$cov (x,y) $ if $ \Sigma x = 55\: \Sigma y = 82\: \Sigma xy = 565\: n=8$ is
jeemain
math
cbse
class11
statistics
analysis-of-frequency-distributions-(coefficient-correlation)
difficult
q44
asked
Feb 1, 2014
by
thanvigandhi_1
1
answer
If $b_{yx}=1.6$ and $b_{xy}=0.4$ and the angle between two regression lines is $ \theta$ then $ \tan \theta$ is
jeemain
math
cbse
class11
statistics
variance-and-standard-deviation
medium
q44
asked
Jan 29, 2014
by
thanvigandhi_1
1
answer
A change of 10 mA in the emitter current produces a change of 7.5 mA in collector current in a transistor . What should be change in base current to produce the same change in collector current.
jeemain
physics
class12
unit19
ch14
q44
easy
transistors
semiconductor-electronics
asked
Jan 28, 2014
by
meena.p
1
answer
Sodium amalgam is used as
jeemain
chemistry
class11
s-block-elements
unit10
q44
medium
asked
Jan 28, 2014
by
sreemathi.v
1
answer
If 1000g of a water sample contains 10g of $CaCO_3$ then the hardness of that water sample is
jeemain
chemistry
class11
hydrogen
unit9
q44
medium
asked
Jan 23, 2014
by
sreemathi.v
1
answer
Due to fluorosis disease
jeemain
chemistry
class11
environmental-chemistry
unit14
q44
medium
asked
Jan 21, 2014
by
sreemathi.v
1
answer
Which atom has as many as s-electron and p-electrons?
sat
atomic-structure
jeemain
chemistry
physical-chemistry
class11
unit2
quantum-mechanical-model
q44
easy
asked
Jan 10, 2014
by
sreemathi.v
1
answer
How much water is to be added to dilute 10ml of 10M HCl to make it decimolar?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q44
easy
asked
Jan 8, 2014
by
sreemathi.v
1
answer
If a, b, c are in GP, find the value of $a^2b^2c^2(\large\frac{1}{a^3}+\large\frac{1}{b^3}+\large\frac{1}{c^3})$
jeemain
math
class11
ch9
sequences-and-series
easy
geometric-progression
q44
asked
Jan 3, 2014
by
yamini.v
1
answer
The distance of the point $(-1,-5,-10)$ from the point of intersection of the line $\overrightarrow r=(2\hat i-\hat j+2\hat k)+\lambda(3\hat i+4\hat j+12\hat k)$ and the plane $\overrightarrow r.(\hat i-\hat j+\hat k)=5$ is ?
jeemain
math
class12
ch11
3d-geometry
intersection-of-lines-and-planes
medium
q44
asked
Jan 2, 2014
by
rvidyagovindarajan_1
1
answer
If $\lim\limits_{x\to 0}(1+ax)^{\Large\frac{b}{x}}=e^2\qquad(a,b\in N)$ then
jeemain
math
class11
ch13
limits-and-derivatives
introduction to limits
easy
q44
asked
Dec 23, 2013
by
sreemathi.v
1
answer
Two radioactive materials $ X_1\: and\: X_2$ have decay constants $ 5\lambda\: and\: \lambda$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of $ X_1$ to that of $ X_2$ will be $ \large\frac{1}{e}$ after a time :
aipmt
modelpaper
physics
2008
q44
asked
Dec 16, 2013
by
thanvigandhi_1
0
answers
Integrate : $I= \int \limits_1^3 \sqrt {3+x^3}.dx$
jeemain
math
class12
unit7
integral-calculus
definite-integrals-as-limit-of-sum
difficult
q44
asked
Dec 16, 2013
by
meena.p
1
answer
At what $[HNO_3]$ thermodynamic tendency or reduction of $NO_3^-$ into NO and $NO_2$ by $Ag$ is same?
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q44
difficult
asked
Dec 12, 2013
by
sreemathi.v
1
answer
In the flowers of Fabaceae, one of the following immediately encloses the essential organs
jeemain
eamcet
biology
2002
q44
asked
Dec 9, 2013
by
thanvigandhi_1
0
answers
Stellate hairs are common in this family
jeemain
eamcet
biology
2001
q44
asked
Dec 2, 2013
by
thanvigandhi_1
0
answers
Quartz is a crystalline variety of
jeemain
chemistry
unit15
p-block-elements
q44
medium
asked
Nov 27, 2013
by
sreemathi.v
1
answer
In one of the following plants, the chromosomes were first observed :
jeemain
eamcet
biology
2000
q44
asked
Nov 26, 2013
by
thanvigandhi_1
2
answers
The pH of pure water at $80^\circ C$ will be
sat
chemistry
chemical-equilibrium
jeemain
aipmt
equilibrium
easy
q44
biology
asked
Nov 23, 2013
by
mosymeow_1
2
answers
In noncyclic photophosphorylation , the site of ATP synthesis taking place between the following electron carriers, is
jeemain
eamcet
biology
1999
q44
asked
Nov 23, 2013
by
thanvigandhi_1
0
answers
Let $A=\begin{bmatrix}1&2\\3&4\end{bmatrix}$ and $B=\begin{bmatrix}a&0\\0&b\end{bmatrix}\;a,b\in N$.Then
jeemain
math
class12
ch3
matrices
q44
equality-of-matrices
easy
asked
Nov 21, 2013
by
sreemathi.v
1
answer
If $\overrightarrow a=2\hat i+3\hat j-\hat k\:\:and\:\:\overrightarrow b=\hat i-2\hat j+3\hat k$, then the value of $\lambda$ for which $\overrightarrow c=\lambda\hat i+\hat j+(2\lambda+1)\hat k$ is parallel to the plane containing $\overrightarrow a\:\:and\:\:\overrightarrow b$ is
jeemain
math
class12
ch10
vector-algebra
medium
vector-product
q44
asked
Nov 15, 2013
by
rvidyagovindarajan_1
1
answer
Which of the following is the correct sequence of cell cycle ?
jeemain
eamcet
biology
2010
q44
asked
Nov 12, 2013
by
thanvigandhi_1
0
answers
For a binomial variate X with $n=6,$ if $P(X=2)=9\;P(X=4),$ then its variance is :
jeemain
eamcet
math
2005
q44
asked
Nov 12, 2013
by
meena.p
1
answer
The transformed equation of $x^2+6xy+8y^2=10$ when the axes are rotated through an angle $\large\frac{\pi}{4}$ is :
jeemain
eamcet
math
2006
q44
asked
Nov 6, 2013
by
meena.p
1
answer
Dense irregular connective tissue is found in :
jeemain
eamcet
biology
2011
q44
asked
Oct 27, 2013
by
thanvigandhi_1
1
answer
The probability distribution of a random variable X is given by
jeemain
eamcet
math
2007
q44
asked
Oct 25, 2013
by
meena.p
1
answer
The solubility of $K_2SO_4$ in water is 16g at $50^{\large \circ}C$.The minimum amount of water required to dissolve $4g\;K_2SO_4$ is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
laws-of-chemical-combinations
q44
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
If X is a Poisson variate such that $P(X-1)-P(X=2),$ then $P(X=4)=$
jeemain
eamcet
math
2008
q44
asked
Oct 17, 2013
by
meena.p
1
answer
Match the following with reference to poultry breeds
jeemain
eamcet
biology
2012
q44
asked
Oct 17, 2013
by
thanvigandhi_1
1
answer
Find the value of $\tan\big[\large\frac{1}{2}$$\big(\sin^{-1}\large\frac{2x}{1+x^2}+$$\cos^{-1}\large\frac{1-y^2}{1+y^2}\big)\big],$$\mid x\mid < 1,y > 0$ and $xy <1$
jeemain
math
class12
ch2
inverse-trigonometric-functions
q44
inverse-trignometric-properties
medium
asked
Oct 17, 2013
by
sreemathi.v
1
answer
The points on the line $3x+4y=5$ which is equidistant from (1,2) and (3,4) is :
jeemain
eamcet
math
2009
q44
asked
Oct 10, 2013
by
meena.p
1
answer
$\large\frac{3\cos\theta+\cos 3\theta}{3\sin \theta-\sin 3\theta}$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q44
trignometric-identities
easy
asked
Oct 9, 2013
by
sreemathi.v
1
answer
A solid blocks whose density is greater then the density of liquid is placed inside the liquid. It begins to float. Now a string attached to the solid holds the solid submerged. Now the tension in the string is $T_1$. If the system is accelerated upward with an acceleration a how will the tension in the string change.
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q44
difficult
asked
Oct 8, 2013
by
meena.p
1
answer
In the life cycle of Wuchereriae, $3^{rd}\: and\: 4^{th}$ moults of microfilaria take place in
jeemain
eamcet
biology
2013
q44
asked
Oct 5, 2013
by
thanvigandhi_1
1
answer
The image of the line $x+y-2=0$ in the $Y-axis$ is :
jeemain
eamcet
math
2010
q44
asked
Sep 27, 2013
by
meena.p
1
answer
$(\tan ^{-1}x)^2+(\cot ^{-1}x)^2=\large\frac{5 \pi^2}{8}$$=>x=$
jeemain
eamcet
math
2011
q44
asked
Sep 20, 2013
by
meena.p
1
answer
If $2x+3y=5$ is the perpendicular bisector of the segment joining the points $A\bigg[1,\large\frac{1}{3}\bigg]$ and $B$ then $B=$
jeemain
eamcet
math
2013
q44
asked
Sep 16, 2013
by
meena.p
1
answer
Aqueous solution of $FeCl_3$ is acidic because of .............. .
jeemain
eamcet
chemistry
1991
fitb
q44
asked
Sep 12, 2013
by
meena.p
0
answers
An object of mass m starts falling towards planet of mass M and Radius R. As it reaches near the surface it passes through a small hole in the planet. The planet is made of two pieces, a sperical shell of negligible thickness and mass $\large\frac{2M}{3}$ and a point mass of $\large\frac{M}{3}$ at center. Change in the force of gravity experienced by the object is
jeemain
physics
class11
unit6
gravitation
q44
medium
asked
Aug 21, 2013
by
meena.p
1
answer
A shell is fired from a canon with a velocity v at an angle $\theta$ with the horizontal. At the highest point of its path it explodes into two pieces of equal masses, one of the pieces retraces its path to point of throw. what is speed of second piece immediately after explosion
jeemain
physics
class11
unit4
work-power-energy
q44
medium
asked
Jul 22, 2013
by
meena.p
1
answer
A box is gently dropped on a conveyor belt in an airport moving of 3m/s. If the coeffiecient of friction between belt and box is 0.5, how far will the box move on the belt (relative to belt) before coming to rest ?
jeemain
physics
class11
unit3
laws-of-motion
q44
medium
asked
Jul 10, 2013
by
meena.p
1
answer
Find the dimension of physical quantity $X$ in the equation $Force=\large\frac{X}{Density}$
jeemain
physics
class11
ch2
units-and-measurement
q44
easy
dimensional-formulae-and-analysis
cbse11
ch1
asked
Jun 19, 2013
by
meena.p
2
answers
The curve $y=ax^{3}+bx^{2}+cx+d$ has a point of inflexion at $x=1$ then
tnstate
class12
bookproblem
p233
objective
q44
modelpaper
jun-2006
asked
May 20, 2013
by
poojasapani_1
1
answer
The equation of the line parallel to $\large\frac{x-3}{1}=\frac{y+3}{5}=\frac{2z-5}{3}$ and passing through the point $(1 , 2 ,5 ) $ in vector form is
tnstate
class12
bookproblem
p269
objective
q44
asked
May 10, 2013
by
poojasapani_1
1
answer
Two cards are drawn from a pack and kept out. Then one card is drawn from remaining 50 cards. Find the prob. that it is an ace.
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q44
p43
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate:\[\int \frac {dx}{\sqrt {\sin ^3x}\sin(x+\alpha)}\]
cbse
class12
additionalproblem
kvquestionbank2012
ch7
q44
p27
math
asked
Feb 3, 2013
by
meena.p
0
answers
A window is in the form of a rectangle above which there is a semicircle. If the perimeter of the window is P cm. Show that the window will allow the maximum possible light only when the radius of the semi circle is $\large\frac{p}{\pi+4}cm$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q44
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
If $ y=\sqrt{x^2-1} - log \bigg(\Large\frac{1}{x}+\sqrt{1+\frac{1}{x^2}}\bigg),\;\normalsize find\;\Large\frac{dy}{dx}$
cbse
class12
additionalproblem
ch5
q44
p14
medium
math
sec-b
asked
Jan 28, 2013
by
meena.p
1
answer
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