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.
