HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Important Questions

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The half-life of a first-order reaction is 1.7 hours. How long will it take for 20% of the reactant to react?

Show that the time required for 99.9% completion of a first-order reaction is three times the time required for 90% completion.

How will you determine activation energy from rate constants at two different temperatures?

Answer the following in brief.

Give one example and explain why it is pseudo-first-order.

The rate law relates to the rate of a chemical reaction in terms of _______.

For first order reaction, the rate constant for the decomposition of N₂O₅ is 6 × 10^–4 s ^–1. The half-life period for decomposition in seconds is ______.

Effect of catalyst in a chemical reaction is to change the _______.

Give one example of a pseudo first-order reaction.

Explain pseudo first order reaction with a suitable example.

Explain with the help of a potential energy diagram that the catalyst increases the rate of the reaction.

For the reaction 2A + B → C, rate of disappearance of A 0.076 mol s ^–1.

1. What is the rate of formation of C?
2. What is the rate of consumption of B?
3. What is the rate of the overall reaction?

In a first-order reaction A → B, 60% of a given sample of a compound decomposes in 45 mins. What is the half-life of reaction? Also, write the rate law equation for the above first-order reaction.

Derive integrated rate law for a zero-order reaction \[\ce{A -> Product}\].

Obtain the expression for half-life and rate constant of the first-order reaction.

Define the half-life of a first-order reaction.

Which of the following correctly represents integrated rate law equation for a first order reaction in a gas phase?

What is the rate constant?

What is zero order reaction?

If unit of rate constant is mol dm⁻³s⁻¹, the order of reaction would be ______.

For the reaction A + B → P.

If [B] is doubled at constant [A], the rate of reaction doubled. If [A] is triple and [B] is doubled, the rate of reaction increases by a factor of 6. Calculate the rate law equation.