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Recent questions tagged q197

Which of the following statement is false about an electrophile ?

asked Mar 6, 2014 by meena.p

1 answer

$HNO_3$ used as a reagent has specific gravity of $1.42 mL^{-1}$ and contains $70\%$ by strength $HNO_3$. Calculate Volume of water required to make $1\;N$ solution from $2\; mL$ concentrated $HNO_3?\;(\text{Normality}_{HNO_3} = 15.78)$

asked Feb 11, 2014 by sharmaaparna1

1 answer

$HNO_3$ used as a reagent has specific gravity of $1.42 mL^{-1}$ and contains $70\%$ by strength $HNO_3$. Calculate Volume of acid that contains 63g pure acid.

asked Feb 11, 2014 by sharmaaparna1

1 answer

De-Broglie proposed dual nature for electron by putting his famous equation $\lambda = \large\frac{h}{mu}$. Later on Heisenburg proposed uncertainity principle as $\bigtriangleup p .\bigtriangleup x \geq \large\frac{h}{2}(h = \large\frac{h}{2\pi})$ . On the contrary particle nature of electron was established on the basis of photoelectric effect. When a photon strikes the metal surface , it gives up its energy to the electron. Part of this energy (say w) is used by the electron to escape from the metal and the remaining imparts the kinetic energy $\large\frac{1}{2}mu^2$ to the photoelectron. The potential applied on the surface to reduce the velocity of photoelectron to zero is known as stopping potential. The wavelength of a golf ball weighing 200g and moving at a speed of 5meter/hr is of the order:

asked Feb 10, 2014 by sharmaaparna1

1 answer

Integrate : $\int e^x \bigg( \sin ^{-1} x +\large\frac{1}{\sqrt {1-x^2}}\bigg) dx $

asked Dec 30, 2013 by meena.p

1 answer

Human insulin is being commercially produced from a transgenic species of :

asked Dec 23, 2013 by thanvigandhi_1

0 answers

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