Recent questions tagged q82

A proton has spin and magnetic moment just like an electron . Why then its effect is neglected in magnetism of materials?

asked Aug 3, 2015 by meena.p

1 answer

Give two examples of magnetic dipole

asked Jul 21, 2015 by meena.p

1 answer

Given n resistance R, how will you combine them to get the minimum effective resistance ?

asked Jul 3, 2015 by meena.p

1 answer

Consider an arbitrary electrostatic field configuration . A small test charge is placed at a null point . ( i.e where $E=0$)of the configuration . Show that the equilibrium of the test charge is necessarily unstable .

asked Apr 29, 2015 by meena.p

1 answer

Which of the following statements is not correct ?

asked Aug 1, 2014 by thanvigandhi_1

1 answer

Which one of the following base is not present in DNA?

asked Apr 7, 2014 by sreemathi.v

1 answer

The pyrimidine bases present in DNA are

asked Mar 30, 2014 by thanvigandhi_1

1 answer

The value of $ \Delta E$ for reversible isothermal evaporation of $90g$ of water at $100^{\circ}C$. Assume that water vapor behaves as ideal gas and $ \Delta H_{vap}$ of water is $540\: cal/g(R = 2\: cal/molK)$

asked Mar 20, 2014 by thanvigandhi_1

1 answer

The pulverization of ores is done during

asked Mar 20, 2014 by meena.p

1 answer

The number average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40,000. The poly dispersity index of the polymer is

asked Mar 12, 2014 by thanvigandhi_1

1 answer

Among the ions $SC^{3+},V^{3+}$ and $Cr^{3+}$ the ion that gives colorless compound is :

asked Mar 12, 2014 by meena.p

1 answer

Pick out among the following species is/are iso structural with $XeO_3$

asked Mar 7, 2014 by sreemathi.v

1 answer

Which of the following alkenes will react fastest with $H_2$ under catalytic hydrogenation conditions ?

asked Feb 26, 2014 by meena.p

1 answer

In CsCl with cubic structure $Cl^-$ ions are located at each corner and $Cs^+$ ions at the centre of the unit cell. If $r_{Cs^+}$ and $r_{Cl^-}$ are $1.69A^{\large\circ}$ and $1.81A^{\large\circ}$ respectively . Find the value of edge length of cube.

asked Feb 25, 2014 by sharmaaparna1

1 answer

The formation of peroxide linkage in either due to the exposure in air can be detected by treating in with

asked Feb 25, 2014 by sreemathi.v

1 answer

From following molar conductivities at infinite dilution $\Lambda_m^{\large\circ}$ for $Ba(OH)_2=457.6\Omega^{-1}cm^2mol^{-1}$,$\Lambda_m^{\large\circ}$ for $BaCl_2=240.6\Omega^{-1}cm^2mol^{-1}$,$\Lambda_m^{\large\circ}$ for $NH_4Cl=129.8\Omega^{-1}cm^2mol^{-1}$.The $\Lambda_m^{\large\circ}$ for $NH_4OH$ is

asked Feb 18, 2014 by sreemathi.v

1 answer

At room temperature $25^{\large\circ}C$,the vapour pressure of pure methyl alcohol is 90 torr.Mol fraction of $CH_3OH$ in a solution in which vapour pressure of $CH_3OH$ is 20 torr at $25^{\large\circ}$ is ?

asked Feb 14, 2014 by sreemathi.v

1 answer

Find the condition of tangency for a line $y=mx+c$ touches the ellipse

asked Feb 7, 2014 by sreemathi.v

1 answer

The largest internal for which solution of differential equation $\large\frac{dy}{dx}=\sqrt {\large\frac{1-y^2}{(1+x^2)^2}}$ where $y(0)= \large\frac{1}{\sqrt 2}$ holds good is

asked Feb 7, 2014 by meena.p

1 answer

which of the following represents the system of logic gates given below.

asked Jan 31, 2014 by meena.p

1 answer

The variance of 6, 8, 10, 12, 14 is

asked Jan 29, 2014 by thanvigandhi_1

1 answer

Pearl ash is

asked Jan 28, 2014 by sreemathi.v

1 answer

$2Na+H_2\quad\underrightarrow{heat}\quad 2NaH$,$Ca+H_2\rightarrow CaH_2$,$2Li+H_2\rightarrow x$.Then $x$ is

asked Jan 24, 2014 by sreemathi.v

1 answer

Catalytic converters are used in

asked Jan 21, 2014 by sreemathi.v

1 answer

If arithmetic, geometric and harmonic means between two positive real numbers is A, G and H respectively, then, which of the following is true?

asked Jan 17, 2014 by yamini.v

1 answer

The number of radial nodes of 3s and 2p orbitals are respectively

asked Jan 15, 2014 by sreemathi.v

1 answer

The direction cosine of a line which is $\perp$ to two perpendicular lines whose direction cosines are $(l_1,m_1,n_1)\:\:and\:\:(l_2,m_2,n_2)$ is ?

asked Jan 8, 2014 by rvidyagovindarajan_1

1 answer

If $\lim\limits_{x\to \infty}\big(\large\frac{x^3+1}{x^2+1}$$-(ax+b)\big)=2$ then

asked Dec 30, 2013 by sreemathi.v

1 answer

Integrate : $\int \large\frac{2^x+3^x}{6^x}$$dx$

asked Dec 18, 2013 by meena.p

1 answer

The correct order of increasing bond angles in the following triatomic species is :

asked Dec 17, 2013 by thanvigandhi_1

0 answers

Plasmodium falciparum causes which type of malaria ?

asked Dec 10, 2013 by thanvigandhi_1

0 answers

If $\overrightarrow a$ is any vector such that $\overrightarrow a\times \hat i+2\overrightarrow a-5\hat k=\overrightarrow 0$, then $\overrightarrow a=?$

asked Dec 6, 2013 by rvidyagovindarajan_1

1 answer

The nature of the cyst wall of Euglena is

asked Dec 5, 2013 by thanvigandhi_1

0 answers

Carbogen is _____________

asked Nov 29, 2013 by sreemathi.v

1 answer

Percentage ionisation of a weak monobasic acid can be calculated by using the formula

asked Nov 27, 2013 by mosymeow_1

2 answers

The number of merozoites at the end of a erythorocytic cycle in plasmodium malariae is :

asked Nov 27, 2013 by thanvigandhi_1

0 answers

A man moves 20 m North, then 10 m east and then $ 10\sqrt2$m south-west, his displacement is :

asked Nov 15, 2013 by thanvigandhi_1

0 answers

The temperature of a perfect black body is $727^{\circ}C$ and its area is $0.1\: m^2$. If Stefan's constant is $ 5.67 \times 10^{-8} W/m^2K^4$, then heat radiated by it in $0.3$ minutes is :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

If $\large\frac{1}{6}$, in place of $\large\frac{1}{12}$ mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will :

asked Oct 30, 2013 by sreemathi.v

1 answer

A non conducting ring of radius 0.5 m has charge of $ 1.11 \times 10^{-10}C$ distributed non-uniformly on its circumference. An electrical field is spread everywhere in space. The value of the potential at the center of the ring is ( approximately )

asked Oct 19, 2013 by thanvigandhi_1

1 answer

The component of vector $\bar {A}= a_x \hat i + a _y \hat j + a _z \hat k$ along the direction of $\hat i- \hat j$ is

asked Oct 18, 2013 by meena.p

1 answer

If $\sin^{-1}x+\sin^{-1}y=\large\frac{\pi}{2}$ then $\cos^{-1}x+\cos^{-1}y$ is equal to

asked Oct 11, 2013 by sreemathi.v

1 answer

A body is projected vertically upwards at time $t=0$ and it is seen at a height $'H'$ at time $t_1$ and $t_2$ seconds during its flight. The maximum height attained is : (g is acceleration due to gravity)

asked Oct 11, 2013 by meena.p

1 answer

A pipe closed at one end and open at the other end resonates with a sound of frequency 135 Hz and also with 165 Hz, but not at any other frequency intermediate between these two. Then, the frequency of the fundamental note of the pipe is

asked Oct 8, 2013 by thanvigandhi_1

1 answer

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