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Recent questions tagged q104
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Volume coefficient according to charle's law is
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
gas-laws
medium
q104
asked
Mar 1, 2014
by
sharmaaparna1
1
answer
When a carbon atom is linked to four different groups it is said to be chiral carbon atom. when alpha hydrogen atom of an alkane is replaced by a functional group we get corresponding compound.An optically active hydrocarbon $(A) C_6H_{10}$ on catalytic reduction gives optically inactive hydrocarbon . structure of $(A )$ is
jeemain
chemistry
class11
organic-chemistry
q104
easy
basic-organic-chemistry
ch12
asked
Feb 27, 2014
by
meena.p
1
answer
An ester (A) with molecular formula $C_9H_{10}O_2$ was treated with excess of $CH_3MgBr$ and the compound so formed was treated with conc.$H_2SO_4$ to form olefin (B).Ozonolysis of B gave ketone with formula $C_8H_8O$ with shows iodoform test positive.The structure of A is
jeemain
chemistry
unit11
unit12
class12
organic-chemistry
oxygen
carboxylic-acids
q104
difficult
asked
Feb 26, 2014
by
sreemathi.v
1
answer
Length of conjugate axis is
jeemain
math
class11
coordinate-geometry-conic -sections
hyperbola
ch11
q104
easy
asked
Feb 10, 2014
by
sreemathi.v
1
answer
If $f\;(xy)=f\;(x+y)\;\forall\;x,y\;\in\;R$ and $\;f\;(2009)=2009$, then $f\;(-2009)$ equals
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q104
asked
Jan 20, 2014
by
yamini.v
1
answer
One quantum is absorbed per molecule of gaseous iodine for converting into iodine atoms.If light absorbed has wavelength of $5000A^{\large\circ}$,calculate energy required in KJ/mol.
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
bhor's-model
q104
medium
asked
Jan 16, 2014
by
sreemathi.v
1
answer
If $\overrightarrow {OA}=\hat i+3\hat j-2\hat k\:\:and\:\:\overrightarrow {OB}=3\hat i+\hat j-2\hat k$ and $C$ is a point of $AB$ so that $\overrightarrow {OC}$ bisects the angle $AOB$, then $\overrightarrow {OC}=?$
jeemain
math
class12
ch10
vector-algebra
easy
addition-of-vectors
q104
asked
Jan 5, 2014
by
rvidyagovindarajan_1
1
answer
Let $f:R\rightarrow R$ be a differentiable function and $f(1)=4$, then the value of $\large \int_4^{f(x)}\large\frac{2t\;dt}{x-1}$ is
jeemain
math
ch5
continuity-and-differentiability
differentiability
medium
q104
asked
Dec 31, 2013
by
sreemathi.v
1
answer
Integrate : $\int \large\frac{3x+1}{(3x^2+2x+1)^2}$$dx$
jeemain
math
class12
ch7
integral-calculus
integration-by-subsitution
easy
q104
asked
Dec 19, 2013
by
meena.p
1
answer
In which of the following male and female gametophytes do not have free living independent existence ?
aipmt
modelpaper
biology
2008
q104
asked
Dec 18, 2013
by
thanvigandhi_1
0
answers
The magnification produced by an astronomical telescope for normal adjustment is 10 and the length of the telescope is 1.1 m. The magnification, when the image is formed at least distance of distinct vision is :
jeemain
eamcet
physics
2010
q104
asked
Nov 17, 2013
by
thanvigandhi_1
1
answer
A liquid flows through two capillary tubes A and B connected in series. The length and radius of B are twice that of A. The ratio of pressure difference across A and across B is :
jeemain
eamcet
physics
2011
q104
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
The successive resonance frequencies in an open organ pipe are 1944 Hz and 2600 Hz. The length of the pipe if the speed of sound in air is 328 m/sec is
jeemain
eamcet
physics
2012
q104
asked
Oct 20, 2013
by
thanvigandhi_1
1
answer
Statement (S) : Using Huygen's eye piece measurement can be taken but are not correct. Reason(R) : The cross wires, scale and final image are not magnified proportionately because the image of the object is magnified by two lenses, whereas the cross wire scale is magnified by one lens only.Identify the correct one of the following :
jeemain
eamcet
physics
2008
q104
asked
Oct 18, 2013
by
meena.p
1
answer
Two bar magnets A,B are placed one over the other and are allowed to vibrate in a vibration magnetometer. They make 20 oscillations per minute when the similar poles of A and B are on the same side, While they make 15 oscillations per minute when their opposite poles lie on the same side. If $M_A$ and $M_B$ are the magnetic moments of A and B and if $M_A > M_B$, the ratio of $M_A$ and $M_B$ is :
jeemain
eamcet
physics
2009
q104
asked
Oct 11, 2013
by
meena.p
0
answers
Water rises in a capillary tube upto a height of 10 cm whereas mercury depresses in it by 3.42 cm. If the angle of contact and density of mercury are $ 135^{\circ}$ and 13.6 gm/cc respectively, then the ratio of the surface tension of water and mercury will be nearly
jeemain
eamcet
physics
2013
q104
asked
Oct 10, 2013
by
thanvigandhi_1
1
answer
A ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and each one is equal to $\large\frac{3}{4}$ th the angle of prism. Then angle of deviation is :
jeemain
eamcet
physics
2010
q104
asked
Sep 30, 2013
by
meena.p
2
answers
Two slabs A and B of different materials but of the same thickness are joined and to end to form a composite slab. The thermal conductivities of A and B are $'k_1'$ and $'k_2$ respectively. A steady temperature distance of $12^{\circ}$ is maintained across the composite slab. If $k_1=\large\frac{k_2}{2}$, the temperature difference across slab A is
jeemain
eamcet
physics
2011
q104
asked
Sep 24, 2013
by
meena.p
1
answer
A microscope consists of an objective of focal length $1.9\;cm$ and eye piece of focal length $5\; cm$. The two lenses are kept at a distance of $10.5 \;cm.$ If the image is to be formed at the least distance of distinct vision, the distance at which the object is to be placed before the objective is (Least distance of distinct vision is 25 cm)
jeemain
eamcet
physics
2013
q104
asked
Sep 18, 2013
by
meena.p
1
answer
The eccentricity of the hyperbola $ 12y^{2}-4x^{2}-24x+48y-127=0$ is
tnstate
class12
bookproblem
p275
objective
q104
modelpaper
oct-2009
mar-2010
asked
May 14, 2013
by
poojasapani_1
1
answer
If A and B are two events such that $P(A|B)=p,P(A)=p,P(B)=\frac{1}{3} \quad$ and $\quad P(A\cup B)= \frac{5}{9},$ then $\; p=\text{_____________}.$?
cbse
class12
ch13
q104
p286
fitb
exemplar
sec-a
easy
math
asked
Jan 10, 2013
by
sreemathi.v
1
answer
True or False: The composition of two continuous functions is a continuous function.
cbse
class12
ch5
q104
p116
true-or-false
exemplar
sec-a
easy
math
asked
Jan 3, 2013
by
sreemathi.v
1
answer
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