In hydrogenation reaction at ${27\,^o}C$, it is observed that hydrogen gas pressure falls from $2\,atm$ to $1.2\,atm$ in $50\,\min$. Calculate the rate of disappearance of hydrogen

  • A

    $3.6\times10^{-8}\,Ms^{-1}$

  • B

    $1.08\times10^{-5}\,Ms^{-1}$

  • C

    $5.2\times10^{-3}\,Ms^{-1}$

  • D

    $6.5\times10^{-4}\,Ms^{-1}$

Similar Questions

In a reaction $2A + B \to {A_2}B$, the reactant $ A $ will disappear at

For the non - stoichimetre reaction $2A + B \rightarrow C + D,$ the following kinetic data were obtained in three separate experiments, all at $298\, K.$

Initial Concentration

$(A)$

Initial Concentration

$(A)$

Initial rate of formation of $C$

$(mol\,L^{-1}\,s^{-1})$

$0.1\,M$ $0.1\,M$ $1.2\times 10^{-3}$
$0.1\,M$ $0.2\,M$ $1.2\times 10^{-3}$
$0.2\,M$ $0.1\,M$ $2.4 \times 10^{-3}$

The rate law for the formation of $C$ is :

  • [JEE MAIN 2014]

If doubling the concentration of a reactant $ 'A'$  increases the rate $4$ times and tripling the concentration of $'A' $ increases the rate $9$  times, the rate is proportional to

  • [AIIMS 1991]

${A_2} + {B_2} \to 2AB;R.O.R = k{[{A_2}]^a}{[{B_2}]^b}$

Initial $[A_2]$ Initial $[B_2]$ $R.O.R.\,(r)\,Ms^{-1}$
$0.2$ $0.2$ $0.04$
$0.1$ $0.4$ $0.04$
$0.2$ $0.4$ $0.08$

Order of reaction with respect to $A_2$ and $B_2$ are respectively 

For the reaction

$2H_2 + 2NO \to N_2 + 2H_2O$

the following mechanism has been proposed

$(i)$  $2NO \rightleftharpoons N_2O_2\,$   (fast)

$(ii)$ $N_2O_2 + H_2 \xrightarrow{{{k_2}}} N_2O + H_2O\,$    (slow)

$(iii)$  $N_2O + H_2 \to N_2 + H_2O\,$   (fast)

then what will be the rate law of this reaction ?