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The rate Constant of reaction A $\to $ B is 0.6 × 10^{–3} mole per second. If the Concentration of A is 5, then the concentration of B after 20 min is:

1. 1.08M

2. 3.60M

3. 0.36M

4. 0.72M

Subtopic: Order, Molecularity and Mechanism |

53%

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NEET - 2015

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The activation energy of a reaction can be determined from the slope of which of the following graphs?

1. ln K vs T

2. ln $\frac{\mathrm{K}}{\mathrm{T}}$vs T

3. ln K vs $\frac{\mathrm{I}}{\mathrm{T}}$

4. ln $\frac{\mathrm{T}}{\mathrm{K}}\mathrm{vs}\frac{\mathrm{I}}{\mathrm{T}}$

2. ln $\frac{\mathrm{K}}{\mathrm{T}}$vs T

3. ln K vs $\frac{\mathrm{I}}{\mathrm{T}}$

4. ln $\frac{\mathrm{T}}{\mathrm{K}}\mathrm{vs}\frac{\mathrm{I}}{\mathrm{T}}$

Subtopic: Arrhenius Equation |

90%

From NCERT

NEET - 2015

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When the initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction will be:

1. 0

2. 1

3. 1.5

4. 2

Subtopic: Order, Molecularity and Mechanism |

83%

From NCERT

NEET - 2015

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What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20^{o}C to 35^{o}C?

(R = 8.314 J mol^{–1} K^{–1})

(R = 8.314 J mol

1. 269 kJ mol^{–1}

2. 34.7 kJ mol^{–1}

3. 15.1 kJ mol^{–1}

4. 342 kJ mol^{–1}

2. 34.7 kJ mol

3. 15.1 kJ mol

4. 342 kJ mol

Subtopic: Arrhenius Equation |

66%

From NCERT

AIPMT - 2013

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A reaction having equal energies of activation for forward and reverse reaction has:

1. ΔG = 0

2. ΔH = 0

3. ΔH = ΔG = ΔS = 0

4. ΔS = 0

Subtopic: Arrhenius Equation |

72%

From NCERT

AIPMT - 2013

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For a reaction between A and B the order with respect to A is 2 and the order with respect to B is 3. The concentration of both A and B is doubled the rate will increase by a factor of:

1. | 12 | 2. | 16 |

3. | 32 | 4. | 10 |

Subtopic: Order, Molecularity and Mechanism |

83%

From NCERT

NEET - 2013

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A reaction is 50% complete in 2 hours and 75% complete in 4 hours. The order of the reaction is:

1. | 1 | 2. | 2 |

3. | 3 | 4. | 0 |

Subtopic: Order, Molecularity and Mechanism |

80%

From NCERT

NEET - 2013

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In a reaction, A + B → Product, the rate is doubled when the concentration of B is doubled, and the rate increases by a factor of 8, when the concentrations of both the reactants (A and B) are doubled. The rate law for the reaction can be written as:

1. Rate = k[A][B]^{2}

2. Rate = k[A]^{2}[B]^{2}

3. Rate = k[A][B]

4. Rate = k[A]^{2}[B]

Subtopic: Definition, Rate Constant, Rate Law |

75%

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AIPMT - 2012

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In a zero-order reaction for every 10 °C rise of temperature, the rate is doubled.

If the temperature is increased from 10 °C to 100 °C, the rate of the reaction will become:

1. 256 times

2. 512 times

3. 64 times

4. 128 times

Subtopic: First Order Reaction Kinetics |

84%

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AIPMT - 2012

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Activation energy ${E}_{a}$ and rate constant (k_{1} and k_{2}) of a chemical reaction at two different temperatures (T_{1} and T_{2}) are related by:

1. | \(\ln \frac{k_2}{k_1}=-\frac{E_a}{R}\left(\frac{1}{T_2}-\frac{1}{T_1}\right)\) |

2. | \(\ln \frac{k_2}{k_1}=-\frac{E_a}{R}\left(\frac{1}{T_2}+\frac{1}{T_1}\right)\) |

3. | \(\ln \frac{k_2}{k_1}=\frac{E_a}{R}\left(\frac{1}{T_2}-\frac{1}{T_1}\right)\) |

4. | \(\ln \frac{k_2}{k_1}=-\frac{E_a}{R}\left(\frac{1}{T_1}-\frac{1}{T_2}\right)\) |

Subtopic: Arrhenius Equation |

55%

From NCERT

AIPMT - 2012

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