For a chemical reaction , the variation in the concentration vs time plot is given as: (a) Predict the order of the reaction and write the unit of rate constant ( ) for this order of reaction. (b) What is the slope of the curve?
Official Solution
Correct Option:
(1)
(a) Order of the Reaction and Unit of Rate Constant: Since the plot of concentration versus time is a straight line with a negative slope, the reaction follows zero-order kinetics. For a zero-order reaction:
where is the rate constant. The unit of the rate constant for a zero-order reaction is: (b) Slope of the Curve: From the equation , the plot of vs. has a slope of . Thus, the slope of the curve is .
02
PYQ 2024
medium
chemistryID: cbse-cla
In the Arrhenius equation, when is plotted against , a straight line is obtained whose:
1
slope is and intercept is
2
slope is and intercept is
3
slope is and intercept is
4
slope is and intercept is
Official Solution
Correct Option:
(4)
Arrhenius equation: where slope and intercept .
03
PYQ 2025
medium
chemistryID: cbse-cla
The strongest base in aqueous solution among the following amines is:
1
C H NH \hspace{0.5cm}
2
C H NH
3
C H NH \hspace{1cm}
4
C H NH
Official Solution
Correct Option:
(3)
Ethanolamine (C H NH ) is the strongest base in aqueous solution because the ethyl group (C H ) is electron-donating, increasing the electron density on the nitrogen atom and making it more basic compared to phenylamine (C H NH ), where the phenyl group withdraws electron density.
About Acids And Bases - CBSE-CLASS-XII
Acids And Bases is a vital chapter for CBSE-CLASS-XII aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Acids And Bases PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Acids And Bases carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
