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Recent questions tagged q149

$O_2$ is present in one litre flask at a pressure of $7.6\times10^{-10}mm$ of Hg. Calculate the number of $O_2$ molecules at $0^{\large\circ}$C.

asked Mar 26, 2014 by sharmaaparna1

1 answer

Polarization of electrons in acrolein may be written,

asked Mar 4, 2014 by meena.p

1 answer

Consider the following statements \[\] Statement 1: The electric bulb glows immediately when switch is turned on \[\] Statement 2: The drift velocity of electrons is very high in metallic conductors

asked Feb 16, 2014 by thanvigandhi_1

1 answer

Find the equation of tangents from the point A(3,2) to the circle $x^2+y^2+4x+6y+8=0$?

asked Feb 11, 2014 by sreemathi.v

1 answer

A series of lines in the spectrum of atomic H lies at wavelengths 656.46 , 486.27 , 434.17 , 410.29 mm. what is the wavelength of next line in this series?

asked Jan 28, 2014 by sharmaaparna1

1 answer

$\;A_{1},A_{2}\;,....\;A_{n}\;$ are fixed +ve real number such that $\;A_{1}\;.A_{2}\;..\;A_{n}=k$ , then $\;A_{1}+2A_{2}+\;...\;nA_{n}$ can not be than :

asked Jan 22, 2014 by yamini.v

1 answer

The value of $\lim\limits_{x\to 0}\big((\sin x)^{1/x}+(1+x)^{\large\sin x}\big)$ where $x > 0$ is

asked Jan 3, 2014 by sreemathi.v

1 answer

Integrate : $ \int \sqrt {2x^2-5x +6 } $$dx$

asked Dec 23, 2013 by meena.p

1 answer

Which one of the following items gives its correct total number ?

asked Dec 21, 2013 by thanvigandhi_1

0 answers

In IUPAC name of

asked Nov 20, 2013 by thanvigandhi_1

0 answers

Which one of the following oxides is reduced by water gas to obtain the metal during its extraction ?

asked Nov 9, 2013 by thanvigandhi_1

0 answers

An oxide of nitrogen (X) is formed when Z is reacted with $P_2O_5$. X is soluble in water and gives Z. Which one of the following is Z?

asked Oct 24, 2013 by thanvigandhi_1

1 answer

Which of the following compound(s) has 'Z' configuration ?

asked Oct 21, 2013 by meena.p

1 answer

During the depression of freezing point experiment an equilibrium is established between the molecules of :

asked Oct 15, 2013 by meena.p

1 answer

If the uncertainty in velocity of a moving object is $ 1.0 \times 10^{-6}\: ms^{-1}$ and the uncertainty in its position is 58 m, the mass of this object is approximately equal to that of : $ (h=6.626 \times 10^{-34}js)$

asked Oct 14, 2013 by thanvigandhi_1

1 answer

The conservation of O-acylated phenol in presence of $AlCl_3$ to $C-$acylated pheno is an example for this type of organic reaction:

asked Oct 2, 2013 by meena.p

1 answer

Assertion (A): Ethanol boils at lower temperature than ethane. Reason (R): The molecular weight of ethanol is higher than that of ethane.

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following gives Prussion blue colour?

asked Sep 19, 2013 by meena.p

1 answer

If $f(x)$ is a p.d.f of a normal variate $x$ and $X\sim N(\mu,\sigma^{2})$ then $\int\limits_{-\infty}^{\mu}f(x)dx $ is

asked Jun 3, 2013 by poojasapani_1

1 answer

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