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Recent questions tagged q107
ASK
The density of a gas at STP is 2.68g/L . The gas may be
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
medium
q107
asked
Mar 1, 2014
by
sharmaaparna1
1
answer
Which of the following statement are true for the organoborance ? (i) It can be thermally rearranged (ii) It can be oxidised to 3-pentanol (iii) It can be converted to pentane (iv) None of these.
jeemain
chemistry
class11
organic-chemistry
q107
difficult
basic-organic-chemistry
ch12
asked
Feb 28, 2014
by
meena.p
1
answer
In the below reaction the products A and B are
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
phenols
q107
easy
asked
Feb 26, 2014
by
sreemathi.v
1
answer
A hyperbola whose asymptotes includes a right angle is said to be
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q107
easy
asked
Feb 10, 2014
by
sreemathi.v
1
answer
If $\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+$......upto $\infty$ = $\frac{\phi^2}{g}$, then $\frac{1}{1^2}+\frac{1}{3^2}+\frac{1}{5^2}+$.....upto $\infty$ will be
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q107
asked
Jan 20, 2014
by
yamini.v
1
answer
When a certain metal was irradiated with light of frequency $1.6\times 10^{16}Hz$,the photoelectrons emitted had twice the kinetic energy as did photoelectrons emitted when the same metal was irradiated with light of frequency $1.0\times 10^{16}$Hz.Calculate $V_0$(threshold frequency) for the metal.
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
quantum-mechanical-model
q107
difficult
asked
Jan 16, 2014
by
sreemathi.v
1
answer
If $\overrightarrow a,\overrightarrow b,\overrightarrow c$ are three coplanar vectors then, $[(2\overrightarrow a-\overrightarrow b)\:(2\overrightarrow b-\overrightarrow c)\:(2\overrightarrow c-\overrightarrow a)]=?$
jeemain
math
class12
ch10
vector-algebra
medium
vector-product
q107
asked
Jan 5, 2014
by
rvidyagovindarajan_1
1
answer
Let $f:R\rightarrow R$ be such that $f(1)=3$ and $f'(1)=6$. Then $\lim\limits_{x\to 0}\big[\large\frac{f(1+x)}{f(1)}\big]^{\Large\frac{1}{x}}$ equals
jeemain
math
unit8
limits-continuity-and-differentiability
medium
q107
asked
Dec 31, 2013
by
sreemathi.v
1
answer
Integrate : $\int \large\frac{3 \tan ^2 [1+\log(x^2)]}{x}$$dx$
jeemain
math
class12
ch7
integral-calculus
integration-by-subsitution
easy
q107
asked
Dec 19, 2013
by
meena.p
1
answer
Which one of the following in birds, indicates their reptilian ancestry ?
aipmt
modelpaper
biology
2008
q107
asked
Dec 18, 2013
by
thanvigandhi_1
1
answer
A short magnet oscillating in vibration magnetometer with a frequency 10 Hz . A downward current of 15 A is established in a long vertical wire placed 20 cm to the west of the magnet. The new frequency of the short magnet is : ( The horizontal component of earth's magnetic field is 12 $ \mu$ T)
jeemain
eamcet
physics
2010
q107
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
P-V diagram of an ideal gas is shown in figure. Work done by the gas in the process ABCD is :
jeemain
eamcet
physics
2011
q107
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
Image of an object at infinity is formed by a convex lens of focal length 30 cm such that the size of the image is 2 cm. If a concave lens of focal length 20 cm is placed in between the convex lens and the image, at a distance 26 cm, from the convex lens size of the new image is
jeemain
eamcet
physics
2012
q107
asked
Oct 20, 2013
by
thanvigandhi_1
1
answer
With a standard rectangular bar magnet the time period of a vibration magnetometer is 4 seconds. The bar magnet is cut parallel to its length into four equal pieces. The time period of vibration magnetometer when one piece is used (in seconds) (bar magnet breadth is small ) is
jeemain
eamcet
physics
2008
q107
asked
Oct 20, 2013
by
meena.p
1
answer
Two point charges $-q$ and $+q$ are located at points $(0,0,-a)$ and $(0,0,a)$ respectively.The electric potential at a point $(0,0,z)$ where $ z > a$ is :
jeemain
eamcet
physics
2009
q107
asked
Oct 14, 2013
by
meena.p
1
answer
A horizontal uniform tube, open at both ends is containing a liquid of certain length at some temperature. When the temperature is changed, the length of the liquid in the tube is not changed. If '$ \alpha$' is the coefficient of linear expansion of the material of the tube and '$ \gamma$' is the coefficient of volume expansion of the liquid, then
jeemain
eamcet
physics
2013
q107
asked
Oct 12, 2013
by
thanvigandhi_1
1
answer
The frequency of vibration magnetometer of the combination of two bar magnets of magnetic moments $M_1$ and $M_2$ is 6 Hz When like poles are tied and it is 2 Hz when the unlike poles are tied together , then the ratio $M_1 : M_2 $ is :
jeemain
eamcet
physics
2010
q107
asked
Sep 30, 2013
by
meena.p
1
answer
The focal length of a lens of dispersive power $0.45$ which should be placed in contact with a convex lens of focal length $84\;cm$ and dispersive power $0.21$ to make the achromatic combination from the two lenses, in cm is :
jeemain
eamcet
physics
2011
q107
asked
Sep 24, 2013
by
meena.p
2
answers
Two short bar magnets have their magnetic moments $1.2\;Am^2$ and $1.0\;Am^2$. They are placed on a horizontal table parallel to each other at a distance of $20\;cm$ between their centers, such that their north poles pointing towards geographic south. They have common magnetic equatorial line. Horizontal component of earth's field is $3.6 \times 10^{-5}$ T. Then, the resultant horizontal magnetic induction at mid point of the line joining their centers is $\bigg(\large\frac{\mu _0}{4 \pi}$$=10 ^{-7} 11/m\bigg)$
jeemain
eamcet
physics
2013
q107
asked
Sep 18, 2013
by
meena.p
0
answers
If $\;p\;$ is $T$ and $\;q$ is $F$, then which of the following have the truth value$T$? \[\begin{array}{1 1}(1)p \vee q&(2)\sim p\vee q\\(3)p \vee \sim q&(4)p \wedge\sim q\end{array}\]
tnstate
class12
bookproblem
p240
objective
q107
modelpaper
oct-2007
mar-2010
asked
May 24, 2013
by
poojasapani_1
1
answer
The directrices of the hyperbola $x^{2}-4(y-3)^{2}=16$ are
tnstate
class12
bookproblem
p275
objective
q107
modelpaper
mar-2006
jun-2009
asked
May 14, 2013
by
poojasapani_1
1
answer
Let X be a random variable taking values $x_1,x_2,.....,x_n$ with probabilities $p_1,p_2,......,p_n$,respectively.Then var(X)=________.
cbse
class12
ch13
q107
p286
fitb
exemplar
sec-a
easy
math
asked
Jan 10, 2013
by
sreemathi.v
0
answers
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