If the initial concentration of the reactant is doubled, the time for half reaction is also doubled. Then the order of the reaction is
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(a) zero (b) fraction (c) three (d) one
The rate of reactions exhibiting negative activation energy
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(a) decreases with increasing temperature (b) increases with increasing temperature (c) does not depend on temperature (d) depents on the height of the potential […]
The conductivity of strong electrolyte
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(a) does not change with dilution (b) depends upon density of electrolytes itself (c) increases on dilution slightly (d) decreases on dilution
Correct Answer:
increases on dilution […]
Which one of the following is wrong about molecularity of a reaction
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(a) It may be whole number or fractional (b) It is calculated from reaction mechanism (c) It is the number […]
The minimum amount of energy required for the reacting molecules to undergo reaction is called
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(a) threshold energy (b) activation energy (c) internal energy (d) potential energy
Correct Answer:
threshold energy
Explanation:
For […]
The term-dc/dt in a rate equation refers to
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(a) the decrease in concentration of the reactant with time (b) the concentration of a reactant (c) the change in concentration of the reactant […]
Hydrolysis of ester, in an acidic medium, is
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(a) first order reaction with molecularity two (b) first order reaction with molecularity one (c) second order reaction with molecularity two (d) second order […]
The mass of an object changes from 0.002 g to 0.00025 g in a time period of 1500 years.The half-life of the object is
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(a) 500 yrs (b) 850 yrs (c) 700 yrs […]
The unit of rate constant depends upon
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(a) rate of reaction (b) order of reaction (c) molecularity of reaction (d) all of the above
Correct Answer:
rate of reaction
Explanation:
r = […]
In the reaction : 2N₂O₅ → 4NO₂ + O₂, initial pressure is 500 atm and rate constant k is 3.38 ˣ 10⁻⁵ s⁻¹.After 10 minutes the final pressure of N₂O₅ is
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(a) […]
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