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Recent questions tagged q133

A flask containing 12g of a gas of relative molecular mass 120 at a pressure of 100 atm , was evacuated by means of a pump untill the pressure was 0.01 atm at the same T. Which of the following is the best estimate of the number of molecules left in the flask. $(N_0 = 6\times10^{23} mol^{-1}$)

asked Mar 5, 2014 by sharmaaparna1

1 answer

In the reaction : $ CH_3CHO +HCN \longrightarrow CH_3CH(OH)CN$ a chiral centre is produced . This product would be :

asked Mar 3, 2014 by meena.p

1 answer

The abscissac of two points A and B are the roots of the equation $x^2+2ax-b^2=0$ and their ordinates are the roots of the equation $x^2+2px-q^2=0$.Find the equation and the radius of the circle with AB as diameter.

asked Feb 11, 2014 by sreemathi.v

1 answer

The sum $1+\frac{3}{x}+\frac{9}{x^2}+\frac{27}{x^3}+....\infty$, ($x\neq\;0$) is finite if

asked Jan 21, 2014 by yamini.v

1 answer

What is the ratio of wavelength of II line of Balmer series and I line of Lyman series

asked Jan 17, 2014 by sreemathi.v

1 answer

Let $f:(0,\infty)\rightarrow R$ and $f(x)=\int_0^xf(t) dt$ if $f(x^2)=x^2(1+x)$ then f(4) equals

asked Jan 2, 2014 by sreemathi.v

1 answer

Integrate : $\int \large\frac{1}{x \log _e x \log ( \log _e x)}$$ dx$

asked Dec 21, 2013 by meena.p

1 answer

The rupture and fractionation do not usually occur in the water column in vessel / tracheids during the ascent of sap because of :

asked Dec 20, 2013 by thanvigandhi_1

0 answers

If the values of $\land_{\infty}$ of $ NH_4CI,NaOH\: and \: NaCI$ are 130, 217 and 109 $ohm^{-1}\: .\: cm^2\: .\: equiv^{-1}$ respectively, the $ \land_{\infty}$ of $NH_4OH$ in $ ohm^{-1}\: .\: cm^2\: .\: equiv^{-1}$ is :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Whar are A,B and C in the reaction?

asked Oct 21, 2013 by thanvigandhi_1

1 answer

When electric current is passed through acidified water for $1930\;seconds,\;1120\;ml$ of $H_2$ gas is collected (at STP) at the cathode. What is the current passed in amperes?

asked Oct 21, 2013 by meena.p

1 answer

Dipole moment of $HCL=1.03\;D,HI=0.38\;D$. Bond length of $HCL=1.3\; A$ and $HI=1.6 A$. The ratio of fraction of an electric charge, $\delta$, existing on each atom in HCl and HI is :

asked Oct 15, 2013 by meena.p

1 answer

Match the following :

asked Oct 14, 2013 by thanvigandhi_1

1 answer

What is the slope of the straight line for the graph drawn between ln $k$ and $\large\frac{1}{T}$, where $k$ is the rate constant of a reaction at temperature T?

asked Oct 1, 2013 by meena.p

1 answer

Calcium carbide is hydrolyzed using heavy water. What are the products formed?

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following plots is correct for a first reaction?

asked Sep 19, 2013 by meena.p

1 answer

Variance of the random variable $X$ is$4$ .Its mean is $2.$ Then $E(X^{2})$ is

asked May 28, 2013 by poojasapani_1

1 answer

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