$1:8$

$1:4$

$4:1$

$8:1$

${\rm{CO}}$ is smaller in size than that of ${\rm{NO}}$

${\rm{CO}}$ is poisonous

The activation energy for the reaction, $2{\rm{NO}} + {{\rm{O}}_2} o 2{\rm{N}}{{\rm{O}}_2}$ is less than $2{\rm{CO}} + {{\rm{O}}_2} o 2{\rm{C}}{{\rm{O}}_2}$

None of the above

$- \frac{{d\left[ {{H_2}} \right]}}{{dt}} = - \frac{{d\left[ {{I_2}} \right]}}{{dt}} = \frac{1}{2}\frac{{d\left[ {HI} \right]}}{{dt}}$

$- \frac{{d\left[ {{H_2}} \right]}}{{dt}} = - 2\frac{{d\left[ {{I_2}} \right]}}{{dt}} = \frac{1}{2}\frac{{d\left[ {HI} \right]}}{{dt}}$

$- \frac{{d\left[ {{H_2}} \right]}}{{dt}} = - \frac{{d\left[ {{I_2}} \right]}}{{dt}} = \frac{{d\left[ {HI} \right]}}{{dt}}$

$- \frac{{d\left[ {{H_2}} \right]}}{{dt}} = - \frac{{d\left[ {{I_2}} \right]}}{{dt}} = - \frac{{d\left[ {HI} \right]}}{{dt}}$

$R$ is Rydberg constant

$K$ is equilibrium constant

${E_a}$ is energy of activation

$A$ is adsorption factor

$3 imes {10^{ - 6}}\;m{s^{ - 1}}$

$3 imes {10^{ - 8}}\;m{s^{ - 1}}$

$3 imes {10^{ - 7}}\;m{s^{ - 1}}$

$3 imes {10^{ - 9}}\;m{s^{ - 1}}$

Greater

Lower

Same

None of these

Concentration of reactants

Temperature

Presence of a catalyst

The volume of the container (for reactions not involving gases)

${r_1} = {r_2} = {r_3}$

${r_1} > {r_2} > {r_3}$

${r_1} < {r_2} < {r_3}$

All of these

A small negative change in reactant concentration over a long time

A large negative change in reactant concentration over a short time

No change in reactant concentration over time

A small positive change in reactant concentration over a long time

Burning of coal

Rusting of iron in moist air

Conversion of monoclinic sulphur to rhombic sulphur

Precipitation of silver chloride by mixing silver nitrate and sodium chloride solutions

$- \frac{1}{3}\frac{{d\left[ A \right]}}{{dt}}$

$- \frac{2}{3}\frac{{d\left[ A \right]}}{{dt}}$

$+ \frac{{2d\left[ A \right]}}{{dt}}$

$- \frac{3}{2}\frac{{d\left[ A \right]}}{{dt}}$