Q. The reaction $A_{\left(\right. g \left.\right)}+2B_{\left(\right. g \left.\right)} \rightarrow C_{\left(\right. g \left.\right)}+D_{\left(\right. g \left.\right)}$ is an elementary process. In an experiment, the initial partial pressure of $A\&B$ are $P_{A}=0.6\&P_{B}=0.8atm$ , when $P_{C}=0.2atm$ the rate of reaction relative to the intial rate is:
Solution:
$ & A+ & 2B \rightarrow & C+ & D & \\ & \left(\right.g\left.\right) & \left(\right.g\left.\right) & \left(\right.g\left.\right) & \left(\right.g\left.\right) & \\ t=0 & 0.6 & 0.8 & 0 & 0 & \ldots \left(\right.1\left.\right) \\ t=t & 0.6-0.2 & 0.8-2\times 0.2 & 0.2 & 0.2 & \\ = & 0.4 & 0.4 & 0.2 & 0.2 & ..\left(\right.2\left.\right)$
from Equation $\left(\right.1\left.\right)$
$r_{i}=K\left[\right.0.6\left]\right.\left[\right.0.8\left]\right.^{2}$
From Equation $\left(\right.2\left.\right)$
$r_{f}=K\left[\right.0.4\left]\right.\left[\right.0.4\left]\right.^{2}$
$\frac{r_{f}}{r_{i}}=\frac{K \left[\right. 0 . 4 \left]\right. \left[\right. 0 . 4 \left]\right.^{2}}{K \left[\right. 0 . 6 \left]\right. \left[\right. 0 . 8 \left]\right.^{2}}$
$=\frac{0 . 4 \times 0 . 4 \times 0 . 4}{0 . 6 \times 0 . 8 \times 0 . 8}=\frac{1}{6}$
Questions from NTA Abhyas 2020
2. A mixture of methane and ethene in a molar ratio of $x:y$ has an average molecular mass of $20 u$ . The mean molar mass when they are mixed in the molar ratio of $y:x$ will be -
Some Basic Concepts of Chemistry
Chemistry Most Viewed Questions
3. An organic compound contains $78 \%$ (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of $C$ is $12, H$ is $1$]
NEET 2021
Some Basic Concepts of Chemistry
5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm$^3$. The molality of the solution is
[Given that molecular mass of NaOH = 40 g mol$^{-1}$]
NEET 2019
Some Basic Concepts of Chemistry
Latest Updates
- JEE Main 2023 February 25th Shift 1 Morning
- JEE Main 2023 February 25th Shift 2 Evening
- JEE Main 2023 January 31st Shift 1 Morning
- JEE Main 2023 January 31st Shift 2 Evening
- JEE Main 2023 January 30th Shift 1 Morning
- JEE Main 2023 January 30th Shift 2 Evening
- JEE Main 2023 January 25th Shift 1 Morning
- JEE Main 2023 January 25th Shift 2 Evening
- JEE Main 2023 January 24th Shift 1 Morning
- JEE Main 2023 January 24th Shift 2 Evening
- JEE Main 2023 February 1st Shift 1 Morning
- JEE Main 2023 February 1st Shift 2 Evening
- JEE Main 2022 July 25th Shift 1 Morning
- JEE Main 2022 July 25th Shift 2 Evening
- JEE Main 2022 July 26th Shift 1 Morning
- JEE Main 2022 July 28th Shift 1 Morning
- JEE Advanced 2022 Paper 2
- JEE Advanced 2022 Paper 1
- JEE Advanced 2021 Paper 2
- JEE Advanced 2021 Paper 1
- JEE Advanced 2020 Paper 2
- JEE Advanced 2020 Paper 1
- NEET 2022 Physics Answer Key
- NEET 2022 Chemistry Answer Key
- NEET 2022 Botany Biology Answer Key
- NEET 2022 Zoology Biology Answer Key
- NEET Rank Predictor 2023