Recent questions tagged q54

If molality of the dilute solution is doubled , the value of molal depression constant $(k_f)$ will be :

asked Nov 6, 2017 by meena.p

0 answers

A galvanometer coil has a resistance of $15 \Omega$ and the meter shows full deflection scale for a current of $4\;mA$ . How will you convert the meter into a voltmeter of range $0\; to\; 6\;A$ ?

asked Jul 29, 2015 by meena.p

1 answer

A bar magnet of magnetic m and moment of inertia I (about center , perpendicular to length ) is cut into two equal pieces, perpendicular to length . Let T be the period of oscillations of the original magnet about an axis . through the mid -point , perpendicular to length , in a magnetic field B. What would be the similar period $T^1$ for each piece?

asked Jul 16, 2015 by meena.p

1 answer

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

asked Jul 16, 2015 by meena.p

1 answer

A silver wire has a resistance of $2.1 \Omega$ at $27.5^{\circ}C$ and a resistance of $2.7\Omega$ at $100^{\circ}$. Determine the temperature coefficient of resistivity of silver.

asked Jun 30, 2015 by meena.p

1 answer

How many electrons must be removed from a ball of mass $3.2 \;g$ so that it may fleat in an electric field of intensity $10^{10}N/C$ directed upwards?

asked Apr 27, 2015 by meena.p

1 answer

The equation of the ellipse whose focus is $(1,-1)$,the directrix the line $x-y-3=0$ and eccentricity $\large\frac{1}{2}$ is

asked Oct 16, 2014 by sreemathi.v

2 answers

Which of the following statements regarding copper salt is not true ?

asked Jul 31, 2014 by thanvigandhi_1

1 answer

True-or-False:In a steamer there are stalls for 12 animals and there are horses,cows and calves (not less than 12 each) ready to be shipped.They can be loaded in $3^{12}$ ways

asked May 16, 2014 by sreemathi.v

1 answer

The value of $\sin\large\frac{\pi}{18}$$+\sin \large\frac{\pi}{9}$$+\sin \large\frac{2\pi}{9}$$+\sin \large\frac{5\pi}{18}$ is given by

asked Apr 21, 2014 by sreemathi.v

1 answer

If $X= \{ 4^n-3n-1:n \in N\}$ and $Y=\{9(n-1):n \in N\}$. Where $N$ is the set of natural numbers , then $X \cup Y $ is equal to

asked Apr 7, 2014 by meena.p

1 answer

Vitamin $B_{12}$ contains

asked Mar 28, 2014 by thanvigandhi_1

1 answer

Cassiterite is concentrated by

asked Mar 18, 2014 by meena.p

1 answer

Starting with same initial conditions an ideal gas expands from volume $V_1$ to volume $V_2$ in three different paths. The work done by the gas is $W_1$ if process is purely isothermal, $W_2$ if process is purely isobaric and $W_3$, if process is purely adiabatic. Which is correct?

asked Mar 17, 2014 by thanvigandhi_1

1 answer

Poly (butylene terephthalate)is a plastic material used in automaitve ignition system and has the structure

asked Mar 11, 2014 by thanvigandhi_1

1 answer

Hydrogen bonding is maximum in

asked Mar 6, 2014 by sreemathi.v

1 answer

The hybridisation of central 'O' atom in $O_3$ molecule is

asked Mar 5, 2014 by sreemathi.v

1 answer

What would be the major product of the following reaction

asked Mar 4, 2014 by sreemathi.v

1 answer

The correct stability order for the following species is

asked Feb 24, 2014 by meena.p

1 answer

In the below reaction,the product X is

asked Feb 21, 2014 by sreemathi.v

1 answer

A solution containing one mole per litre each of $Cu(NO_3)_2,AgNO_3,Hg_2(NO_3)_2,Mg(NO_3)_2$ is being electrolysed by using inert electrodes.The values of standard potentials are $E^0_{Ag^+/Ag}=0.8V$,$E^0_{Hg^{+2}/Hg}=0.79V$,$E^0_{Cu^{+2}/Cu}=0.34V$,$E^0_{Mg^{+2}/Mg}=-2.3V$ with increasing voltage the sequence of deposition of metals on the cathode will be

asked Feb 17, 2014 by sreemathi.v

1 answer

Show that normal to the parabola $y^2=4x$ at the point (1,2) meet it again at some point of parabola, find the point?

asked Feb 6, 2014 by sreemathi.v

1 answer

find value of $K_1$ and $K_2$ for which $y= \large\frac{x}{K_1} $$+K_2$ is a solution of differential equation $y''-2y' -3y=x$

asked Feb 6, 2014 by meena.p

1 answer

Consider the coordination compound,$K_2[Cu(CN)_4]$.A coordinate covalent bond exists between

asked Feb 3, 2014 by sreemathi.v

1 answer

Which of the following statement is not correct.

asked Jan 30, 2014 by sreemathi.v

1 answer

In a p-n function diode a input signal is applied as shown. The output across $R_L$ is

asked Jan 28, 2014 by meena.p

1 answer

The metal carbonate which decomposes easily on heating is

asked Jan 28, 2014 by sreemathi.v

1 answer

The % of by weight of hydrogen $H_2O_2$ is

asked Jan 23, 2014 by sreemathi.v

1 answer

The density of air is maximum in

asked Jan 21, 2014 by sreemathi.v

1 answer

The number of d-electrons retained in $Fe^{2+}$ ion is :

asked Jan 13, 2014 by sreemathi.v

1 answer

Two elements A (atomic weight = 75) and B (atomic weight = 16) combine to yield a compound. The % by weight of A in the compound was found to be 75.08 . The formula of the compound is :

asked Jan 9, 2014 by sreemathi.v

1 answer

If the $3^{rd}$ term of a GP is 18 and the $10^{th}$ term is 39366 , find the $7^{th}$ term of the GP.

asked Jan 3, 2014 by yamini.v

1 answer

If $P(3,2,-4),\:Q(5,4,-6)\:and\:R(9,8,-10)$ are collinear,then $R$ divides $PQ$ in ratio?

asked Jan 3, 2014 by rvidyagovindarajan_1

1 answer

Let $f:R\rightarrow R$ be a differentiable function having $f(2)=6,f'(2)=\large\frac{1}{48}$.Then $\lim\limits_{x\to 2}\int_6^{f(x)}\large\frac{4t^3dt}{x-2}$ equals

asked Dec 24, 2013 by sreemathi.v

1 answer

If 'a' stands for the edge length of the cubic systems : simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively

asked Dec 16, 2013 by thanvigandhi_1

1 answer

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