List of practice Questions

Angular frequency of an electron in Bohr atom with quantum number n is proportional to

As resistance in a series resonant circuit increases (i) sharpness of resonance decreases (ii) bandwidth increases

Excited H atom emits a photon of energy $12.1 \, eV$, orbital angular momentum of electron changes by

Fehling's reagent contains

For a cell reaction involving two electron change, the standard e.m.f. of the cell is found to be 0.295 Vat 298 K. The equilibrium constant of the reaction at the same temperature will be

Hofmann's bromamide reaction is used to convert

If $f\left(9\right)= 9 , f'\left(9\right) = 4 $ then $\lim_{x\to9} \frac{\sqrt{f\left(x\right)} -3}{\sqrt{x} - 3} = $

If the rate equation for reaction is, rate =$ k[A][B]^{1/2}$, the order of reaction is

If $x= a\left(\cos \theta +\theta \sin \theta\right)$ and $ y = a \left(\sin \theta- \theta \cos \theta \right) $ where $0 < \theta < \frac{\pi}{2}$ , then $ \frac{d^{2}y}{dx^{2}}$ at $ \theta = \frac{\pi}{4}$ is equal to

If $\log y= m \tan^{-1} x,$ then

In a sonometer experiment, when the tension is changed by $10\, kg \, wt$, fundamental frequency emitted increases by $50 \%$ . Original tension in kg wt is

In the group $\{1, 2, 3, 4, 5, 6\}$ under multiplication modulo $7$, if $5x = 4$, then $x =$

In the manufacture of NaOH, by electrolysis of an aqueous solution of sodium chloride, the cathode and anode are separated by using a diaphragm because

IUPAC name of $ {K_3[Fe(CN)_6]}$ is

Least stable structure in liquid crystalline state is observed in

Let $y' = e^{-2x} $ and $ y = 0$ when $x =e$. Then the value of $x$ when $ y =\frac{1}{2}$ is