1
COMEDK 2021
+1
-0

Determine the specific rate constant of the reaction. If the half-life period of a first order reaction is 1402 s.

A
$$4.94\times10^{-3}~\mathrm{s}^{-1}$$
B
$$0.49\times10^{-3}~\mathrm{s}^{-1}$$
C
$$0.49\times10^{-4}~\mathrm{s}^{-1}$$
D
$$4.94\times10^{-5}~\mathrm{s}^{-1}$$
2
COMEDK 2021
+1
-0

Rate constant (K) of a reaction has least value at

A
high T and high E$$_a$$
B
high T and low E$$_a$$
C
low T and low E$$_a$$
D
low T and high E$$_a$$
3
COMEDK 2021
+1
-0

For the reaction 2N$$_2$$O$$_5$$ $$\to$$ 4NO$$_2$$ + O$$_2$$, rate constant $$k$$ is 4.48 $$\times$$ 10$$^{-5}$$ s$$^{-1}$$ and the initial pressure is 600 atm. After 10 min, determine the final pressure of N$$_2$$O$$_5$$.

A
590 atm
B
490 atm
C
588 atm
D
580 atm
4
COMEDK 2020
+1
-0

Which one of the following is a second order reaction?

A
$$C{H_3}COOC{H_3} + NaOH\buildrel {} \over \longrightarrow C{H_3}COONa + {H_2}O$$
B
$${H_2} + C{l_2}\buildrel {Sunlight} \over \longrightarrow 2HCl$$
C
$$N{H_4}N{O_3}\buildrel {} \over \longrightarrow {N_2} + 3{H_2}O$$
D
$${H_2} + B{r_2}\buildrel {} \over \longrightarrow 2HBr$$
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