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Recent questions tagged q195

A sample of gas occupies a volume of 512 mL at $20^{\large\circ}C$ and 74 cm of Hg as pressure . What volume would this gas occupy at STP?

asked Apr 8, 2014 by sharmaaparna1

1 answer

An organic compound contains carbon, hydrogen and oxygen . Its elemental analysis gave C, $38.71\%$ and $H, 9.67 \%$ The empirical formula of the compound would be

asked Mar 6, 2014 by meena.p

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 binding energy of electron in a metal is 250 KJ/mol. The threshold frequency of metal is

asked Feb 10, 2014 by sharmaaparna1

1 answer

If $a, b, c$ are in $GP$ and equations $ax^2+2bx+c=0$ and $dx^2+2ex+f=0$ have a common root, then $\large\frac{d}{a}$, $\large\frac{e}{b}$, $\large\frac{f}{c}$ are in

asked Jan 24, 2014 by yamini.v

1 answer

Integrate : $\int e^x. \bigg[\large\frac{1- \sin x}{1- \cos x }\bigg].$$dx$

asked Dec 30, 2013 by meena.p

1 answer

Main objective of production / use of herbicide resistant GM crops is to :

asked Dec 23, 2013 by thanvigandhi_1

1 answer

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