Question

Rate of the reaction depends on:

• A. temperature
• B. concentration of the reactants
• C. presence of catalyst
• D. all of the above

Answer 1

Answer: (D)

all of the above

Rate of reaction depends on temperature, concentration of the reactants and presence of catalyst.

Example-

$1.$ At higher temperature, particles collide more frequently and with greater similarity.

$2.$ $C{H}_4\left(g\right)+2O_2\left(g\right)⟶C{O}_2\left(g\right)+2H_{2}O$ Faster rate

$C_{25}{H}_{52}\left(g\right)+38O_2⟶25C{O}_2\left(g\right)+26H_{2}O$ Slow rate

So, reaction depends on nature of reactants.

$3.$ A catalyst is a species that speeds up a chemical reaction with being chemically changed upon completion of reaction.