Select Question Set:

Activation energy of any chemical reaction can be calculated if one knows the value of

1. | Probability of collision. |

2. | Orientation of reactant molecules during collision. |

3. | Rate constant at two different temperatures. |

4. | Rate constant at standard temperature. |

Subtopic: Arrhenius Equation |

68%

From NCERT

NEET - 2024

Please attempt this question first.

Hints

Please attempt this question first.

Which plot of In k vs \(\frac{\text{I}}{\text{T}}\) is consistent with Arrhenius equation?

1. | 2. | ||

3. | 4. |

Subtopic: Arrhenius Equation |

63%

From NCERT

NEET - 2024

Please attempt this question first.

Hints

Please attempt this question first.

The rate of a reaction quadruples when temperature changes from 27°C to 57°C. Calculate the energy of activation.

Given R = 8.314 J K^{-1} mol^{-1}, log 4 = 0.6021

1. 380.4 kJ/mol

2. 3.80 kJ/mol

3. 3804 kJ/mol

4. 38.04 kJ/mol

Given R = 8.314 J K

1. 380.4 kJ/mol

2. 3.80 kJ/mol

3. 3804 kJ/mol

4. 38.04 kJ/mol

Subtopic: Arrhenius Equation |

From NCERT

NEET - 2024

Please attempt this question first.

Hints

Please attempt this question first.

Which of the following expression is correct for the reaction given below?

\(2 \mathrm{HI}_{(g)} \rightarrow \mathrm{H}_{2(g)}+\mathrm{I}_{2(g)}\)

\(2 \mathrm{HI}_{(g)} \rightarrow \mathrm{H}_{2(g)}+\mathrm{I}_{2(g)}\)

1. | \(\dfrac{-\Delta[\mathrm{H}I]}{\Delta t}=\dfrac{2 \Delta\left[\mathrm{H}_2\right]}{\Delta t}\) | 2. | \(\dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{4\Delta\left[\mathrm{I}_2\right]}{\Delta t}\) |

3. | \(\dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{4 \Delta\left[\mathrm{H}_2\right]}{\Delta t}\) | 4. | \( \dfrac{-\Delta[\mathrm{H}]}{\Delta t}=\dfrac{\Delta\left[\mathrm{H}_2\right]}{\Delta t}\) |

Subtopic: Definition, Rate Constant, Rate Law |

82%

From NCERT

NEET - 2024

Please attempt this question first.

Hints

Please attempt this question first.

Effective collisions are known to possess:

**A:** energy greater than threshold energy.

**B:** breaking of old bond in reactant.

**C:** formation of new bond in product.

**D:** high activation energy.

**E:** proper orientation.

Choose the correct answer from the options given below:

1.**A**, **B**, **C**, **D** only

2.**A**, **B**, **C**, **E** only

3.**A**, **C**, **D**, **E** only

4.**B**, **C**, **D**, **E** only

Choose the correct answer from the options given below:

1.

2.

3.

4.

Subtopic: Arrhenius Equation |

69%

From NCERT

NEET - 2024

Please attempt this question first.

Hints

Please attempt this question first.

The time taken by the first order decomposition of \(\text{SO}_2\text{Cl}_2\) to decompose to 40% is 560 seconds. The rate constant for the reaction is:

(log 2.5 = 0.3979)

1. \(2.726 \times 10^{-5} \mathrm{~min}^{-1}\)

2. \(2.276 \times 10^{-5} \mathrm{~min}^{-1}\)

3. \(2.216 \times 10^{-5} \mathrm{~min}^{-1}\)

4. \(2.126 \times 10^{-5} \mathrm{~min}^{-1}\)

(log 2.5 = 0.3979)

1. \(2.726 \times 10^{-5} \mathrm{~min}^{-1}\)

2. \(2.276 \times 10^{-5} \mathrm{~min}^{-1}\)

3. \(2.216 \times 10^{-5} \mathrm{~min}^{-1}\)

4. \(2.126 \times 10^{-5} \mathrm{~min}^{-1}\)

Subtopic: First Order Reaction Kinetics |

From NCERT

NEET - 2024

Please attempt this question first.

Hints

Please attempt this question first.

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):

In the light of the above statements choose the correct answer from the options given below:

Assertion (A): |
A reaction can have zero activation energy. |

Reason (R): |
The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy. |

1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |

2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |

3. | (A) is true but (R) is false. |

4. | (A) is false but (R) is true. |

Subtopic: Arrhenius Equation |

From NCERT

NEET - 2023

Please attempt this question first.

Hints

Please attempt this question first.

For a certain reaction, the rate = \(k[A]^2[B],\) when the initial concentration of A is tripled keeping the concentration of B constant, the initial rate would be:

1. | increase by a factor of three |

2. | decrease by a factor of nine |

3. | increase by a factor of six |

4. | increase by a factor of nine |

Subtopic: Order, Molecularity and Mechanism |

75%

From NCERT

NEET - 2023

Please attempt this question first.

Hints

Please attempt this question first.

The correct options for the rate law that corresponds to overall first order reaction is:

1. | \( Rate =k[A]^0[B]^2 \) | 2. | \( Rate =k[A][B] \) |

3. | \(Rate=k[A]^{1 / 2}[B]^2 \) | 4. | \(Rate =k[A]^{-1 / 2}[B]^{3 / 2}\) |

Subtopic: Order, Molecularity and Mechanism |

77%

From NCERT

NEET - 2023

Please attempt this question first.

Hints

Please attempt this question first.

For a reaction \(3A \rightarrow 2B\)

The average rate of appearance of B is given by \(\Delta [B] \over \Delta t\).

The correct relation between the average rate of appearance of B with the average rate of disappearance of A is:

The average rate of appearance of B is given by \(\Delta [B] \over \Delta t\).

The correct relation between the average rate of appearance of B with the average rate of disappearance of A is:

1. | \(-\Delta [A] \over \Delta t\) | 2. | \(-3\Delta [A] \over 2\Delta t\) |

3. | \(-2\Delta [A] \over 3\Delta t\) | 4. | \(\Delta [A] \over \Delta t\) |

Subtopic: Definition, Rate Constant, Rate Law |

78%

From NCERT

NEET - 2023

Please attempt this question first.

Hints

Please attempt this question first.

Select Question Set: