Recent questions tagged q58

The bromination of acetone that occurs in acid solution is represented by this equation $ CH_3COCH_3(aq)+Br_2(aq) \rightarrow CH_3COCH_2Br(aq) +H^+(aq)+Br^-(aq)$

asked Dec 16, 2013 by thanvigandhi_1

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Reptilian feature of Archaeopteryx ?

asked Dec 9, 2013 by thanvigandhi_1

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Hypo parathyroidism leads to

asked Dec 2, 2013 by thanvigandhi_1

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Silicon belongs to which category?

asked Nov 28, 2013 by sreemathi.v

1 answer

A solution was prepared by dissolving 0.0005 mol of $Ba(OH)_2$ in 100 mL of the solution. If the base is assumed to ionise completely, the $pOH$ of the solution will be

asked Nov 27, 2013 by mosymeow_1

1 answer

In frog astragulus is a part of :

asked Nov 26, 2013 by thanvigandhi_1

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If $\overrightarrow a,\overrightarrow b,\overrightarrow c$ are three non coplanar vectors then $(\overrightarrow a+\overrightarrow b+\overrightarrow c).(\overrightarrow b+\overrightarrow c)\times (\overrightarrow c+\overrightarrow a)=?$

asked Nov 21, 2013 by rvidyagovindarajan_1

1 answer

If $\cot^{-1}(\sqrt{\cos\alpha})-\tan^{-1}(\sqrt{\cos\alpha})=x$ then $\sin x$ is equal to

asked Nov 18, 2013 by sreemathi.v

1 answer

The scientific name of Kashmiri stag is :

asked Nov 13, 2013 by thanvigandhi_1

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The cartesian from of the polar equation $\theta=\tan^{-1} 2$ is :

asked Nov 12, 2013 by meena.p

1 answer

If the eccentricity of a hyperbola is $\sqrt 3$; then the eccentricity of its conjugate hyperbola is :

asked Nov 6, 2013 by meena.p

1 answer

In the blood circulation of Pheretima, the blood collected by lateral Oesophageal blood vessel flows into supra oesophageal blood vessels through :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

25ml of a solution of barium hydroxide titration with 0.1molar solution of hydro-chloric acid gave a titre value of 35ml.The molarity of barium hydroxide is

asked Oct 28, 2013 by sreemathi.v

1 answer

If the line $lx+my=1$ is normal to the hyperbola

asked Oct 26, 2013 by meena.p

1 answer

The distance between the foci of the hyperbola $x^2-3y^2-4x-6y-11=0$ is

asked Oct 17, 2013 by meena.p

1 answer

The selection in a population subject to rapidly changing environments with highly fluctuating food sources is called

asked Oct 17, 2013 by thanvigandhi_1

1 answer

The eccentricity of the conic $\large\frac{5}{r}$$=2 + 3 \cos \theta+ 4 \sin \theta$ is :

asked Oct 10, 2013 by meena.p

1 answer

A minute hand of a clock is 20cm long.How far does the tip of the hand move in 20 minutes.

asked Oct 9, 2013 by sreemathi.v

1 answer

Arrange the following in the ascending order of their number per cubic millimeter present in the blood

asked Oct 6, 2013 by thanvigandhi_1

1 answer

The length of the latus rectum of the conic $\large\frac{5}{r}$$=2+3 \;\cos \theta +4 \sin \theta$ is :

asked Sep 27, 2013 by meena.p

1 answer

The probability distribution of a random variable $X$ is given below :X=x 0 1 2 3 P(X=x) $\frac{1}{10}$ $\frac{2}{10}$ $\frac{3}{10}$ $\frac{4}{10}$ Then the variance of $X$ is

asked Sep 23, 2013 by meena.p

1 answer

The perpendicular distance from the point $(1,\pi)$ to the line joining $(1,0^{\circ})$ and $(1, \large\frac{\pi}{2}),$ (in polar coordinates) is

asked Sep 16, 2013 by meena.p

1 answer

At what height from the ground will the value of 'g' be the same as that in 10 km deep mine below the surface of earth

asked Aug 23, 2013 by meena.p

1 answer

A particle has initial velocity $\bar v =3 \hat i+4 \hat j$ and a constant force $F=4 \hat i-3 \hat j$ acts on the particle. The path of the particle is

asked Jul 11, 2013 by meena.p

1 answer

The curve $9y^{2}=x^{2}(4-x^{2})$ is symmetrical about

asked May 21, 2013 by poojasapani_1

1 answer

If $x^{2}+y^{2}=1$ then the value of $\large\frac{1+x+iy}{1+x-iy}$ is

asked May 11, 2013 by poojasapani_1

1 answer

Evaluate:\[\int \frac {dx}{(sin x-2\cos x)(2 \sin x+\cos x)}\]

asked Feb 3, 2013 by meena.p

0 answers

A man 160 cm tall walks away from a source of light situated at the top of the pole 6m high at the rate of 1.1 m/sec. How fast is the length of the shadow increasing when he is 1m away from the pole.

asked Jan 29, 2013 by meena.p

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The solution of $x \large\frac{dy}{dx}$$+y=e^x$ is:\[(A)\;y=\frac{e^x}{x}+\frac{k}{x} \quad (B)\;y=xe^x+cx \quad (C)\;y=xe^x+k \quad (D)\;x=\frac{e^y}{y}-\frac{k}{y}\]

asked Jan 19, 2013 by sreemathi.v

1 answer

$\Large \int\limits_0^\frac{\pi}{2}\normalsize \sqrt {1-\sin2x}\;dx$ is equal to $(A)\;0\quad(B)\;2\quad(C)\;1\quad(D)\;-1$

asked Jan 15, 2013 by sreemathi.v

1 answer

$f(x)=x^x$ has a stationary point at

asked Jan 12, 2013 by sreemathi.v

1 answer

If $P(A)=\Large\frac{3}{10},\normalsize P(B)=\Large\frac{2}{5}$ and $P(A\cap B)=\Large\frac{3}{5},$then $P(B|A)+P(A|B)$ equals

asked Jan 10, 2013 by sreemathi.v

1 answer

If $ax^2+2hxy+by^2+2gx+2fy+c=0$,then show that $\large \frac{dy}{dx}.\frac{dx}{dy}\normalsize =1$

asked Jan 2, 2013 by sreemathi.v

1 answer

True or False: The maximum value of $\begin{vmatrix}1 & 1 & 1\\1 &(1-\sin x) & 1\\1 & 1 & 1-cos x\end{vmatrix}\;is\;\Large \frac{1}{2}$.

asked Dec 28, 2012 by sreemathi.v

1 answer

If $A=\begin{bmatrix}0 & 1\\1 & 0\end{bmatrix},$then $A^2$ is equal to

asked Dec 23, 2012 by sreemathi.v

1 answer

True or False: The relation R on the set A={1,2,3} defined as R={(1,1),(1,2),(2,1),(3,3)} is reflexive,symmetric and transitive.

asked Dec 20, 2012 by sreemathi.v

1 answer

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