Recent questions tagged q103

To expel half the mass of air from a large flask at $27^{\large\circ}C$ , it must be heated to

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. IUPAC name for lowest molecular mas optically active alkene is

asked Feb 27, 2014 by meena.p

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Given: $CH_3COCH_3$ $\large\xrightarrow[\quad pyrolysis \quad]{700^{\large\circ}C}$ $A$ $\large\xrightarrow {CH_3COOH}$ $B$ $\large\xrightarrow {RCOOH} C$ based on these reactions. Write the structures of A and C

asked Feb 26, 2014 by sreemathi.v

1 answer

Length of transverse axes is

asked Feb 10, 2014 by sreemathi.v

1 answer

Sum of n terms of series $\;\frac{1}{1^3}\;+\frac{1+2}{1^3+2^3}\;+\frac{1+2+3}{1^3+2^3+3^3}\;+....\;is$

asked Jan 20, 2014 by yamini.v

1 answer

Three isotopes of an element have mass numbers m,m+1 and m+2.If the mean mass number is ( m +0.5) then which of the following ratios may be accepted for m,(m+1) and (m+2) in that order

asked Jan 16, 2014 by sreemathi.v

1 answer

If $f(x)=\left\{\begin{array}{1 1}\large\frac{\sin [x]}{[x]}&[x]\neq 0\\0&[x]=0\end{array}\right.$, where $[x]$ denotes the greatest integer less than or equal to x, then $\lim\limits_{x\to 0}f(x)$ equals

asked Dec 31, 2013 by sreemathi.v

1 answer

If position vector of the points $A,B,C,D$ are given by $7\hat i-4\hat j+7\hat k,\:\hat i-6\hat j+10\hat k,\:-\hat i-3\hat j+4\hat k\:\:and\:\:5\hat i-\hat j+5\hat k$ respectively, then $ABCD$ is ?

asked Dec 30, 2013 by rvidyagovindarajan_1

1 answer

Integrate : $\int \large \frac{e^{\Large a \sin ^{-1} x}}{\sqrt {1-x^2}}$$.dx$

asked Dec 19, 2013 by meena.p

1 answer

Which one of the following is heterosporous ?

asked Dec 18, 2013 by thanvigandhi_1

0 answers

A ray of light travels from an optically denser medium towards rarer medium. The critical angle for the two media is 'C'. The maximum possible angle of deviation of the ray is :

asked Nov 17, 2013 by thanvigandhi_1

1 answer

The surface energy of a liquid drop is E. It is sprayed into 1000 equal droplets. Then their surface energy is

asked Nov 2, 2013 by thanvigandhi_1

1 answer

The room temperature is $ + 20^{\circ}C$ when outside temperature is $- 20^{\circ}C$. Room temperature is $ + 10^{\circ}C$ when outside temperature is $ - 40^{\circ}C$. The temperature of the radiator heating the room is

asked Oct 20, 2013 by thanvigandhi_1

1 answer

The refractive index of a material of a plano concave lens is $\large\frac{5}{3}$, the radius of curvature is $0.3\;m$. The focal length of the lens in air is

asked Oct 18, 2013 by meena.p

1 answer

The two lenses of an achromatic doublet should have :

asked Oct 11, 2013 by meena.p

1 answer

Force constants of two wires A and B of the same material are K and 2K respectively. If the two wires are stretched equally , then the ratio of work done in stretching $ \bigg( \large\frac{W_A}{W_B} \bigg)$ is

asked Oct 10, 2013 by thanvigandhi_1

1 answer

In an optical fibre, core and cladding were made with materials of refractive indices 1.5 and 1.414 respectively . To observe total internal reflection , what will be the range of incident angle with the axis of optical fibre?

asked Sep 30, 2013 by meena.p

1 answer

During an adiabatic process, the pressure of a gas is proportional to the cube of its temperature. The value of $C_p/C_v$ for that gas is :

asked Sep 24, 2013 by meena.p

1 answer

The two surfaces of a concave lens, made of glass of refractive index $1.5 $ have the same radii of curvature R. It is now immersed in a medium of refractive index $1.75$ then the lens,

asked Sep 17, 2013 by meena.p

1 answer

The P.L of $(3D^{2}+D-14)y=13e^{2x}$ is

asked May 24, 2013 by poojasapani_1

1 answer

The locus of foot of perpendicular from the focus to a tangent of the curve $ 16x^{2}+25y^{2}=400$ is

asked May 13, 2013 by poojasapani_1

1 answer

True or False: If A,B and C are three independent events such that P(A)+P(B)=P(C)=p,then\[P(At\;least\;two\;of\;A,B,C\; occur)=3p^2-2p^3\]

asked Jan 10, 2013 by sreemathi.v

1 answer

True or False: If f is continuous on its domain D ,then | f | is also continuous on D.

asked Jan 3, 2013 by sreemathi.v

1 answer

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