List of practice Questions

The total energy of the particle executing simple harmonic motion of amplitude $A$ is $100 \,J$. At a distance of $0.707\, A$ from the mean position, its kinetic energy is

The waves for the propagation of which a material medium is essential will be

Threshold of audibility for normal human ear is

What is the effect on the time period of a simple pendulum if the mass of the bob is doubled?

Which of the following energy-time graphs represents damped harmonic oscillator?

Which of the following expressions does not represent simple harmonic motion?

Which of the following gives pure sine wave of single frequency ?

Which of the following is not characteristics of simple harmonic oscillation?

Which of the following motions is not simple harmonic?

Which of the following $x-t$ graphs does not represent periodic motion?

Which one of the following is not a periodic motion?

99% of a first order reaction was completed in 32min. When will 99.9% of the reaction complete ?

A first order reaction is $20\%$ complete in $10$ minutes. What is the specific rate constant for the reaction?

A first order reaction is $50$% complete in $30$ minutes at $27?C $ and in $10$ minutes at $47?C$. The reaction rate constant at $27?C$ and the energy of activation of the reaction are respectively

A first order reaction takes $40$ min for $30\%$ decomposition. What will be $t_{1/2}$?

A following mechanism has been proposed for a reaction 2A + B$\to$ D + EA + B$\to$ C + D (slow)A + C $\to$ E (fast) .The rate law expression for the reaction is

A hypothetical reaction $A_{2}+B_{2} \rightarrow 2 A B$ follows the mechanism as given below, $\left.A_{2} \rightleftharpoons A+A \text { (fast }\right) $ $A+B_{2} \longrightarrow A B+B \text { (slow) } $ $A+B \longrightarrow A B \text { (fast) }$ The order of the overall reaction is

A reaction is 50% complete in 2 hours and 75% complete in 4 hours the order of reaction is

A schematic plot of ln $k_{eq}$ versus inverse of temperature for a reaction is shown in the figure. The reaction must be

A substance A decomposes in solution following the first order kinetics. Flask I contains 1 L of 1 M solution of A and flask II contains 100 mL of 0.6 M solution. After 8 hr the concentration of A what will be the timefor concentration of A in flask II to become 0.3 M

A substance undergoes first order decomposition. The decomposition follows two parallel first order reactions as : $If k_{1}=1.26\times10^{-4} s^{-1}, k_{2}=3.8 \times10^{-5} s^{-1},$ then the percentage distributions of B and C are respectively

A zero order reaction is one whose rate is independent of

Among the following reactions, the fastest one is

Collision theory is applicable to

Consider the reaction Consider the reaction $A$ $\rightarrow$ $B$. The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?