Recent questions tagged q55

Which one is the most acidic compound?

asked Nov 6, 2017 by meena.p

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Two changed particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field $\overrightarrow{B} =B_0 \hat k$

asked Jul 29, 2015 by meena.p

1 answer

Assume the dipole model for earth's magnetic field B which is given by $B_v$ =Vertical component of magnetic field $=\large\frac{\mu_0}{4 \pi}.\frac{2m \cos \theta}{r}$ $B_H$= Horizontal component of magnetic field $\qquad= \large\frac{\mu_o}{4 \pi} \frac{\sin \theta m}{r^3}$ $\theta= 90^{\circ}$- latitude as measured from magnetic equator . Find loci of points for which $|B|$ is minimum

asked Jul 16, 2015 by meena.p

1 answer

At Room temperature $(27.0^{\circ})$ the resistance of a heating element is $100\;\Omega$ What is the temperature of the element if the resistance is found to be $117\;\Omega$ , given that the temperature coefficient of the material of the resistance is $1.70 \times 10^{-4} .c^{-1}$

asked Jun 30, 2015 by meena.p

1 answer

Two points charges $+Q$ and $+4Q$ are seperated by a distance of $6a$ . find the point on the line joining the two charges where the electric field is zero.

asked Apr 27, 2015 by meena.p

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The length of the latus rectum of the ellipse $3x^2+y^2=12$ is

asked Oct 16, 2014 by sreemathi.v

1 answer

Heating of $Al_2(SO_4)_3$ gives

asked Jul 26, 2014 by thanvigandhi_1

1 answer

State whether the following statement is true or false and justify : The lines $ ax + 2y + 1 = 0, bx + 3y + 1 = 0 $ and $cx + 4y + 1 = 0$ are concurrent if a, b, c are in G.P

asked Jul 9, 2014 by thanvigandhi_1

1 answer

True-or-False:If some or all of n objects are taken at a time,the number of combinations is $2^n-1$

asked May 16, 2014 by sreemathi.v

1 answer

If $A$ lies in the second quadrant and $3\tan A+4=0$,then the value of $2\cot A-5\cos A+\sin A$ is equal to

asked Apr 21, 2014 by sreemathi.v

1 answer

The locus of the foot of perpendicular drawn from the centre of the ellipse $x^2+3y^2=6$ on any tangent to it is:

asked Apr 7, 2014 by meena.p

1 answer

Complete hydrolysis of cellulose gives

asked Mar 29, 2014 by thanvigandhi_1

1 answer

The method is very useful for preparing semiconductors is

asked Mar 18, 2014 by meena.p

1 answer

One mole of non-ideal gas undergoes a change of state $(2\: atm, 3.01\: L,\: 95K) \: to\: (4\: atm,\: 5L,\: 245K)$ with change in internal energy, $ \Delta U = 30\: L-atm$. The change in enthalpy of the process in $ L-atm$ is

asked Mar 17, 2014 by thanvigandhi_1

1 answer

The monomer which has the least bility tto underho cationic polymerisatiomn is

asked Mar 11, 2014 by thanvigandhi_1

1 answer

In the change of $NO^+$ to NO,the electron is added to

asked Mar 6, 2014 by sreemathi.v

1 answer

The number of outer electron in $N_3^-$ are

asked Mar 5, 2014 by sreemathi.v

1 answer

Which of the following will not give coloured dye with benzene diazonium chloride?

asked Mar 4, 2014 by sreemathi.v

1 answer

Among the following , the molecule with the highest dipole moment is :

asked Feb 24, 2014 by meena.p

1 answer

Which is a product X of reaction?

asked Feb 21, 2014 by sreemathi.v

1 answer

If $E^0_{Fe^{+2}/Fe}$ is $X_1$,$E^0_{Fe^{+3}/Fe}$ is $X_2$ then $E^0_{Fe^{+3}/Fe^{+2}}$ will be

asked Feb 17, 2014 by sreemathi.v

1 answer

Find the relation between $'t_1'$ meets the parabola again at $'t_2'$ for the parabola $y^2=4ax$?

asked Feb 6, 2014 by sreemathi.v

1 answer

The growth rates of a bacteria population is proportional to its size. Initially the population is $10,000$ while after 10 days its size is $25,000$ . What will be population after 20 days?

asked Feb 6, 2014 by meena.p

1 answer

Given the list of ligands and their corresponding names, choose the pair that disagree.

asked Feb 3, 2014 by sreemathi.v

1 answer

Which occurs in nature in free state

asked Jan 30, 2014 by sreemathi.v

1 answer

Which of the following is an alkaline earth?

asked Jan 28, 2014 by sreemathi.v

1 answer

Find the median of the data 21, 39, 27, 31, 23, 41, 49, 29.

asked Jan 25, 2014 by thanvigandhi_1

1 answer

One ml of $H_2O_2$ solution gives 50ml of $O_2$ at NTP,so it is

asked Jan 23, 2014 by sreemathi.v

1 answer

The suspected carcinogenic water pollutant is

asked Jan 21, 2014 by sreemathi.v

1 answer

The orbital angular momentum for an electron resolving in an orbit is $\large\frac{h}{2\pi}$$\sqrt{l(l+1)}$.This momentum of a $s$-electron is :

asked Jan 13, 2014 by sreemathi.v

1 answer

Divide 44 into 4 parts following an AP such that the ratio of the product of extremes to the product of the means is 5:14.

asked Jan 3, 2014 by yamini.v

1 answer

If $P$ is a point in space such that $OP=12$ and $\overrightarrow {OP} $ is inclined with angle $45^{\circ} $ with $OX$ and $60^{\circ}$ with $OY$ then the coordinates of $P$ is ?

asked Jan 3, 2014 by rvidyagovindarajan_1

1 answer

$\lim\limits_{x\to 0}\large\frac{\sin x-x}{x^3}$=

asked Dec 24, 2013 by sreemathi.v

1 answer

Integrate: $\int \limits_{0}^{\large\frac{\pi}{2}} \large\frac{\cos x}{(1+\sin x)(2+ \sin x)}$$ dx $

asked Dec 16, 2013 by meena.p

1 answer

Kohlrausch's law states that at :

asked Dec 16, 2013 by thanvigandhi_1

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