Question Text
Question 1 :
According to drawback of Rutherford's structure of atom electron should fall in:
Question 2 :
Energy of an electron is given by $E=-2.178\times 10^{18}J\displaystyle \left(\frac{Z^2}{n^2}\right).$<br>Wavelength of light required to excite an electron in an hydrogen atom from level $n=1$ to $n=2$ will be:<br>$(h=6.62\times 10^{-34}Js$ and $c=3.0\times 10^8ms^{-1})$
Question 3 :
The two electrons have the following set of quantum numbers:<br>$P=3,2,-2,+\cfrac{1}{2}$<br>$Q=3,0,0,+\cfrac{1}{2}$<br>Which of the following statement is true?
Question 4 :
If the mass of electron is doubled, the radius of first orbit of $H-atom$ becomes apprioximately
Question 5 :
<p> <font face="Cambria Math, serif">Which of the following gave the idea of nucleus of the atom?</font></p>
Question 6 :
<p> <font face="Cambria Math, serif">The half life period of a radioactive element does not depend upon:</font></p>
Question 7 :
The equilibrium constant K for the reaction:<br/>$2HI(g)\rightleftharpoons H_2(g)+I_1(g)$ at room temp is 2.85 and that at 698 K is $1.4\times 10^{-2}$. This implies that the forward reaction is: