The ionic product of water at ${25}^{\circ }C$ is ${10}^{-4}.$ The ionic product at ${90}^{\circ }C$ will be

A first order reaction is 50% completed in $1.26\times {10}^{14}s.$ How much time would it take for 100% completion ?

When 100 mL of 0.4 M $C{H}_{3}COOH$ are mixed with 100 mL of 0.2 NaOH, the $\left[H_3{O}^{+}\right]$ in the solution is approximately : $\left[K_a\left(C{H}_{3}COOH\right)=1.8\times {10}^{-5}\right]$

Which of the following is not used to determine cell constant ?

One mole of aniline warmed with the mixture of $NaN{O}_2+HCl.$ If we assume 100% yield, volume of $N_2$ gas liberated at S.T.P is

Phenol reacts with bromine in carbon disulphide at low temperature to give

What set of conditions would be useful for preparing a $2^{\circ }$ amine?

0.1 mole of $C{H}_{3}N{H}_2$ $\left(K_b=5\times {10}^{-4}\right)$ is mixed with 0.08 mole of HCl and diluted to 10 litre, what will be the $O{H}^{-}$ concentration in the solution ?

Calculate the number of photons emitted by a $100W$ yellow lamp in $1.0s.$ Take the wavelength of yellow light as $560nm$ and assume $100$ percent efficiency.

Which of the following is/are disproportionation reactions ?