List of top Chemistry Questions on Collision Theory of Chemical Reactions asked in COMEDK UGET

During a chemical reaction \( X \rightarrow Y \), the rates of reaction starting with initial concentrations of \( X \) as \( 4.0 \times 10^{-3} M \) and \( 2.0 \times 10^{-3} M \) are \( 4.8 \times 10^{-4} \, mol \, L^{-1}/s \) and \( 1.2 \times 10^{-4} \, mol \, L^{-1}/s \) respectively. What is the order of reaction with respect to \( X \)?

The decomposition of \( PH_3 \) follows first order kinetics. The time required for \( \frac{3}{4} \)th of \( PH_3 \) to decompose is \( 75.76\,s \). Calculate the fraction of original amount of \( PH_3 \) which will remain after \( 2.0 \) minutes.

When the temperature of a reaction \( A + B \rightarrow C \) is increased from \( 300\,K \) to \( 310\,K \) the rate constant increases by \( 12\% \). What is the Activation energy of the reaction?

The order of a reaction \( W + X \rightarrow Y + Z \) with respect to W is 3 and with respect to X is 1. If the concentrations of both W and X are tripled, the rate of reaction will increase by -------- times.

The rate constant for a zero order reaction \( A \rightarrow B + C \) is \( 6.0 \times 10^{-3} \, \text{mol L}^{-1} \, \text{s}^{-1} \). What would be the time taken for the initial concentration of A to decrease from 0.2 M to 0.024 M?

(i) and (ii) are two chemical reactions carried out at TK.
\[ (i) \, X \rightarrow Y + W \, \text{with rate constant} \, k_1 \] \[ (ii) \, X \rightarrow Z + W \, \text{with rate constant} \, k_2 \]
The activation energy for reaction (ii) is 3 times that of reaction (i). What is the expression for \( k_1 \)?