Recent questions tagged q66

The cyclotron frequency $W= \large\frac{eB}{m}$ has correct dimension of $[T]^{-1}$. Is this statement true or false

asked Jul 30, 2015 by meena.p

1 answer

What is the reduction factor of galvanometer . The amount of of current required to produce $45^{\circ}$ deflection in a galvanometer is defined as it reduction factor.

asked Jul 20, 2015 by meena.p

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The number of density of free electron in a copper conductor estimated at $8.5 \times 10^{20}m^{-3}$. How long does an electron take a drift from one end of a wire $3.0 \; m$ long to its other end ? The area of cross - section of the wire is $2 \times 10^{-6}\;m^2$ and it is carrying of $3.0 \;A$

asked Jul 1, 2015 by meena.p

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A point charge of $2.0 \mu C$ is at the centre of a cubic guassian surface $9.0\;cm $ on edge. What is the net electric flux through the surface ?

asked Apr 27, 2015 by meena.p

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Given $x > 0$,the value of $f(x)=-3\cos \sqrt{3+x+x^2}$ lie in the interval _________

asked May 20, 2014 by sreemathi.v

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Consider separate solutions of $0.500\; M$ $C_2 H_5 OH (aq),0.100M $$Mg_3(PO_4)_2(aq),0.250M KBr(aq)$ and $0.125\; M$ $Na_3PO_4(aq)$ at $25^{\large\circ}C$.Which Which statement is true about these solutions, assuming all salts to be strong electrolytes ?

asked Apr 7, 2014 by sreemathi.v

1 answer

The pair of compounds in which both the compound shows positivities with Tollens reagent is

asked Mar 30, 2014 by thanvigandhi_1

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Consider the reaction $N_2 + 3H_2 \rightarrow 2NH_3$ carried out at constant temperature and pressure. If $ \Delta H\: and\: \Delta U$ are the enthalpy and internal energy changes for the reaction, which of the following expressions is true?

asked Mar 18, 2014 by thanvigandhi_1

1 answer

The substance not likely to contain CaCO3 is

asked Mar 18, 2014 by meena.p

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Which of the following represents neoprene polymer?

asked Mar 12, 2014 by thanvigandhi_1

1 answer

Which of the following molecule is having highest lattice energy

asked Mar 7, 2014 by sreemathi.v

1 answer

The electric field in an electromagnetic wave is given by $E = 50N/C\: \sin \omega (t-x/c)$. Find the energy contained in a cylinder of cross-section $10cm^2$ and length 50 cm along the x-axis.

asked Mar 1, 2014 by thanvigandhi_1

1 answer

The correct statements about the compound: $H_3C(HO)HC - CH = CH -CH(OH)CH_3 (X)$ are:

asked Feb 25, 2014 by meena.p

1 answer

The approriate reagents for the following transformation?

asked Feb 24, 2014 by sreemathi.v

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The Volume of the average adult lung when expanded is about $6L$ at $98.4^{\large\circ}F$. If the pressure of oxygen in inhaled air is $168mm$ of $Hg$ , calculate the mass of $O_2$ required to occupy the lung at $98.4^{\large\circ}F$.

asked Feb 20, 2014 by sharmaaparna1

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The standard reduction potential of $Cu^{+2}/Cu$ and $Ag^+/Ag$ electrode are 0.337 and 0.799Volt respectively for this positive emf galvanic cell,for what concentration of $Ag^+$ will be emf of cell at $25^{\large\circ}C$ be zero,if the concentration of $Cu^{+2}$ is 0.01M?

asked Feb 17, 2014 by sreemathi.v

1 answer

Find the solution : $ x^2y'=1-xy$

asked Feb 6, 2014 by meena.p

1 answer

If the normal to a parabola $y^2=4ax$ make an angle $\theta$ with the axis and $\phi$ is the angle it makes when it cut the parabola again find the relation between $\theta$ & $\phi$?

asked Feb 6, 2014 by sreemathi.v

1 answer

(Crystal Field Theory) When the valence d orbitals of the central metal ion are split in energy in an octahedral ligand field, which orbitals are raised least in energy?

asked Feb 3, 2014 by sreemathi.v

1 answer

Lanthanoids are

asked Jan 30, 2014 by sreemathi.v

1 answer

The Boolean equation for the circuit is

asked Jan 30, 2014 by meena.p

1 answer

The electrical conductivity in aqueous solutions is high for

asked Jan 28, 2014 by sreemathi.v

1 answer

The weighted A.M of first $n$ natural numbers whose weights are equal is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

$H_2O_2$ is obtained by action of dil $H_2SO_4$ on

asked Jan 24, 2014 by sreemathi.v

1 answer

Which of the following is not a air pollutant?

asked Jan 21, 2014 by sreemathi.v

1 answer

Which of the following sets of quantum numbers represents the highest energy of an atom?

asked Jan 13, 2014 by sreemathi.v

1 answer

Which term of the sequence 130,126,122----- is the first negative term.

asked Jan 5, 2014 by yamini.v

1 answer

The distance of the point $(1,1,1) $ from the plane passing through the points $(2,1,1),\:(1,2,1)\:and\:(1,1,2)$ is ?

asked Jan 5, 2014 by rvidyagovindarajan_1

1 answer

$\lim\limits_{x\to 0}\large\frac{\cos(\sin x)-1}{x^2}$=

asked Dec 24, 2013 by sreemathi.v

1 answer

Integrate : $ \int \limits_{-\frac{\pi}{2}}^{\frac{\pi}{2}} \large\frac{\log (5 - \theta \sin \theta)}{\log (5+\theta \sin \theta)}$$d \theta$

asked Dec 17, 2013 by meena.p

1 answer

The rate constant $k_1\: and \: k_2$ for two different reactions are $ 106{16}.e^{-2000/T}\: and \: 10^{15}.e^{-1000/T}$ , respectively. The temperature at which $ k_1 = k_2$ is :

asked Dec 16, 2013 by thanvigandhi_1

0 answers

The drug used for deworming in poultry is :

asked Dec 9, 2013 by thanvigandhi_1

1 answer

Darwin's theory of Natural Selection fails to explain

asked Dec 5, 2013 by thanvigandhi_1

0 answers

If $\overrightarrow a= x^2\hat i+2\hat j-2\hat k,\:\overrightarrow b=\hat i-\hat j+\hat k\;and\:\overrightarrow c=x^2\hat i+5\hat j-4\hat k$ are three vectors, then the values of $x$ for which the angle between $\overrightarrow a\:and\:\overrightarrow b$ is acute and that between $\overrightarrow b\:and\:\overrightarrow c$ is obtuse is ?

asked Nov 29, 2013 by rvidyagovindarajan_1

1 answer

There are how many Boron atoms in metaborate ion?

asked Nov 28, 2013 by sreemathi.v

1 answer

Hydrolysis constant of $NH^+_4$ is $5.55 \times 10^{-10}$. The ionisation constant of $NH^+_4$ is

asked Nov 27, 2013 by mosymeow_1

1 answer

The snake baring head and elongated hexagonal vertebrals is :

asked Nov 26, 2013 by thanvigandhi_1

0 answers

Which of the following is an autoimmune disorder ?

asked Nov 14, 2013 by thanvigandhi_1

0 answers

If $x \sqrt {1+y}+y \sqrt {1+x}=0$ then $\large\frac{dy}{dx}$ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

If $f(x)= \left\{ \begin{array}{1 1} \frac{1- \sqrt 2 \sin x}{\pi-4x} & \quad if\;x \neq \frac{\pi}{4} \\ \alpha & \quad if\;x= \frac{\pi}{4} \end{array}. \right. $ is continuous at $\large\frac{\pi}{4}, $ then $\alpha$ is equal to :

asked Nov 6, 2013 by meena.p

1 answer

The molality of 1 litre solution with $X\%$ by weight $H_2SO_4$ is equal to 9.The weight of the solvent present in the solution is 910g.The value of $X$ :

asked Oct 29, 2013 by sreemathi.v

1 answer

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