Recent questions tagged q72

A charged particle of charge e and mass m is moving in an electric field $\overrightarrow{E}$ and magnetic field $\overrightarrow{B}$. Construct dimension less quantities and quantities of dimension $[T]^{-1}$

asked Jul 30, 2015 by meena.p

1 answer

The vertical component of earth magnetic field at a plane is $\large\frac{1}{\sqrt 3}$ times the horizontal component. What is the value of angle of dip at this place ?

asked Jul 20, 2015 by meena.p

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Explain why aluminium Wires are preferred for overhead power cables?

asked Jul 2, 2015 by meena.p

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Two points charges $q_1$ anb $ q_2$ are located at points $(a,0,0)$ and $(0,b,0)$ respectively . Find the electric field bue to these charges at the point $(0,0,0)$

asked Apr 28, 2015 by meena.p

1 answer

Which of the following statements is not correct ?

asked Aug 1, 2014 by thanvigandhi_1

1 answer

True-or-False :One value of $\theta$ which satisfies the equation $\sin ^4\theta-2\sin ^2\theta-1$ lies between 0 and $2\pi$

asked May 20, 2014 by sreemathi.v

1 answer

For the rection $SO_2(g)+\large\frac{1}{2}$$O_2(g)\leftrightharpoons SO_3(g)$ if $K_P = K_C (RT)^X$ where the symbols have usual meaning then the value of x is: (assuming ideality)

asked Apr 7, 2014 by sreemathi.v

1 answer

Which one of the following statements are true for protein synthesis(Translation)?

asked Mar 30, 2014 by thanvigandhi_1

1 answer

The one that is used automobiles and aeroplanes is.

asked Mar 20, 2014 by meena.p

1 answer

Calculate the bond energy of $ C-H$ bond in methane from the following data: \[\] $C(s) + 2H_2(g) \rightarrow CH_4(g);\: \: \: \Delta H = -74.8\: kJ$ \[\] $ H_2(g)\rightarrow 2H(g);\Delta H = 435.4\: kJ$ \[\] $ C(s) \rightarrow C(g);\Delta H = 718.4 \: kJ$

asked Mar 19, 2014 by thanvigandhi_1

1 answer

How are polymers classified on the basis of source of availability

asked Mar 12, 2014 by thanvigandhi_1

1 answer

Hydrolysis products of $lnC_2$ what is x.

asked Mar 12, 2014 by meena.p

1 answer

Among $KO_2,AlO_2,BaO_2$ and $NO_2^+$,unpaired electron present in

asked Mar 7, 2014 by sreemathi.v

1 answer

How many optically active stereoisomers are possible for butane$-2, 3-$diols?

asked Feb 25, 2014 by meena.p

1 answer

What is the major product in the following reaction:

asked Feb 24, 2014 by sreemathi.v

1 answer

Calculate the percentage of free volume available in 1 mole gaseous water at 1.0atm and $100^{\large\circ}C$. Density of liquid $H_2O$ at $100^{\large\circ}C$ is 0.958 g/mL.

asked Feb 23, 2014 by sharmaaparna1

1 answer

An electric current is passed through two electrolytic cells connected in series.One containing a solution of silver nitrate and the other solution of $H_2SO_4$.What volume of oxygen measured at $25^{\large\circ}C$ and 750mm of Hg would be liberated from $H_2SO_4$ if $8\times 10^{22}$ ions of $Ag^+$ are deposited from the silver nitrate solution?

asked Feb 17, 2014 by sreemathi.v

1 answer

One mole each of the following solutes are taken in 1000g of water

asked Feb 14, 2014 by sreemathi.v

1 answer

Find the vertex and focus of the parabola $\large\frac{x^2}{64}+\frac{y^2}{100}$=1.

asked Feb 6, 2014 by sreemathi.v

1 answer

Solve : $\large\frac{dy}{dx}$$=\sqrt {16 x^2 y -4x^2 y^2}\qquad y(2)=1$

asked Feb 6, 2014 by meena.p

1 answer

Four alkali metals A,B,C and D are having standard electrode potentials as -3.05,-1.66,-0.40 and 0.80v respectively,which one will be the most reducing agent?

asked Jan 28, 2014 by sreemathi.v

1 answer

If in a frequency distribution, the mean and median are 21 and 22 respectively, then its mode is approximately

asked Jan 26, 2014 by thanvigandhi_1

1 answer

The coordination no of Na is solid NaH is

asked Jan 24, 2014 by sreemathi.v

1 answer

Organic matter+$O_2\qquad\underrightarrow{\text{Aerobic organisms}}\qquad x+y$.The $y$ in the equation is

asked Jan 21, 2014 by sreemathi.v

1 answer

For a d electron,the orbital angular momentum is :

asked Jan 15, 2014 by sreemathi.v

1 answer

If $P(0,1,0)\:and\:Q(0,0,1)$ are two points in space, then the projection of $PQ$ on the plane $x+y+z=3$ is ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

Two cars start at a point A at the same time. The first car goes with a uniform speed of 100 Km/hr and the second car starts at 80 for the first hour and increases the speed by 10 km/hr every hour. After how much time does the second car overtake the first car, assuming these are no stops in between.

asked Jan 6, 2014 by yamini.v

1 answer

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

asked Dec 24, 2013 by sreemathi.v

1 answer

Integrate : $ \int \large\frac{1}{(x)^{5/2}}$$dx$

asked Dec 17, 2013 by meena.p

1 answer

How many moles of lead (II) chloride will be formed froma reaction between 6.5 g of PbO and 3.2 g of HCI ?

asked Dec 17, 2013 by thanvigandhi_1

0 answers

Ceratium is a :

asked Dec 9, 2013 by thanvigandhi_1

0 answers

" Red tide " on the surface of the sea is due to which protozoan ?

asked Dec 5, 2013 by thanvigandhi_1

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If sum of two unit vectors is also a unit vector then the magnitude of their difference is ?

asked Dec 3, 2013 by rvidyagovindarajan_1

1 answer

Quartz is form of

asked Nov 28, 2013 by sreemathi.v

1 answer

$pH$ of 0.01 M $(NH_4)_2SO_4$ and 0.02 M $NH_4OH$ buffer ($pK_a$ of $NH_4^+$ = 9.26) is

asked Nov 27, 2013 by mosymeow_1

1 answer

The correct chronological sequence of eras is :

asked Nov 26, 2013 by thanvigandhi_1

0 answers

The macrophages present in the liver are called :

asked Nov 14, 2013 by thanvigandhi_1

0 answers

$\int \large\frac{x^{49} \tan^{-1} (x^{50})}{(1+x^{100})}$$dx=k(\tan^{-1}(x^{50})^2+c$ then k is equal to :

asked Nov 13, 2013 by meena.p

1 answer

If $\int \sqrt {\large\frac{x}{a^3-x^3}}dx=g(x)+c,$ then $g(x) $ is equal to :

asked Nov 7, 2013 by meena.p

1 answer

Statement (S) : Nematodes exhibit 'cutely'. Reason (R) : In nematodes cell divisions cease near the end of embryonic development so that the number of the cells of the adult is constant.

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Molarity of $H_2SO_4$(density 1.8g/ml) is 18m.The molality of this $H_2SO_4$ is

asked Oct 29, 2013 by sreemathi.v

1 answer

$\int \tan^{-1} \bigg(\sqrt {\large\frac{1-x}{1+x}}\bigg)$$dx$ is equal to

asked Oct 28, 2013 by meena.p

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