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Molecular collisions



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Q1. Select the correct option from the following option.

(a) Catalyst is used to increase the rate of reaction by altering chemically during the course of reaction
(b) Catalyst is used to decrease the rate of reaction by altering chemically during the course of reaction
(c) Catalyst is used to increase the rate of reaction and remains unaltered chemically during the course of reaction
(d) Catalyst is used to decrease the rate of reaction and remains altered chemically during the course of reaction

Q2. The reactions register an increase in rates in the presence of radiations of specific wavelengths.

(a) True
(b) False
(c)
(d)

Q3. The reaction rate is greatly influenced by ___________

(a) Nature of bond in the reactant molecules
(b) Strength of bond in the reactant molecules
(c) Both nature and strength of the reactant molecules
(d) It does not depend on either nature or strength of the reactant molecules

Q4. Concentration of the reactants is __________ proportional to the number of collisions and _________ proportional to the reaction rate.

(a) Directly, inversely
(b) Directly, directly
(c) Inversely, directly
(d) Inversely, inversely

Q5. The effective collisions between the reactant molecules at higher temperatures ___________

(a) Increase
(b) Decrease
(c) Remains same
(d) First increase then decrease

Q6. Which of the following factor does not effect the rate of reaction?

(a) Concentration of the reactant
(b) Temperature
(c) Pressure
(d) Effect of catalyst

Q7. Which of the following statement is incorrect about the molecularity of a reaction?

(a) It is a theoretical concept
(b) Each step of a multi-step reaction has a unique molecularity
(c) It is equal to the total number of reactants taking part in elementary step
(d) It can be zero, fractional or integer

Q8. The elementary processes with molecularity greater than ________ are not known.

(a) 1
(b) 2
(c) 3
(d) 0

Q9. The molecularity of a multi-step reaction does not make any sense.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q10. Molecularity of a reaction is equal to the total number of _____________

(a) Products formed in the elementary step
(b) Reactants taking part in elementary step
(c) Reactants and products in the elementary step
(d) Reactants and products in the final step


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457 views

In A Closed Flask Of 5 Litres, 1.0 G Of H2 Is Headed From 300 To 600 K. Which Statement Is Not Correct

Modified 237 Year Ago

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457
237 Year Ago

In A Closed Flask Of 5 Litres, 1.0 G Of H2 Is Headed From 300 To 600 K. Which Statement Is Not Correct

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0 Answer
439 views

Equal Amounts Of Two Gases Of Molecular Weight 4 And 40 Are Mixed. The Pressure Of The Mixture Is 1.1 Atm. The Partial Pressure Of The Light Gas In This Mixture Is

Modified 237 Year Ago

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237 Year Ago

Equal Amounts Of Two Gases Of Molecular Weight 4 And 40 Are Mixed. The Pressure Of The Mixture Is 1.1 Atm. The Partial Pressure Of The Light Gas In This Mixture Is

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411 views

Assertion : Effusion Rate Of Oxygen Is Smaller Than Nitrogen. Reason : Molecular Size Of Nitrogen Is Smaller Than Oxygen.

Modified 237 Year Ago

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237 Year Ago

Assertion : Effusion Rate Of Oxygen Is Smaller Than Nitrogen. Reason : Molecular Size Of Nitrogen Is Smaller Than Oxygen.

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401 views

Molecules/ions And Their Magnetic Properties Are Given Below

Modified 237 Year Ago

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237 Year Ago

Molecules/ions And Their Magnetic Properties Are Given Below

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401 views

Assertion : We Air Is Heavier Than Dry Air. Reason : The Density Of A Dry Air Is More Than Density Of Water.

Modified 237 Year Ago

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237 Year Ago

Assertion : We Air Is Heavier Than Dry Air. Reason : The Density Of A Dry Air Is More Than Density Of Water.

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0 Answer
399 views

Assertion : 4.58mm And 0.0098°C Is Known To Be Triple Point Of Water. Reason : At This Pressure And Temperature All The Three States I.e., Water, Ice And Vapour Exist Simultaneously.

Modified 237 Year Ago

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237 Year Ago

Assertion : 4.58mm And 0.0098°C Is Known To Be Triple Point Of Water. Reason : At This Pressure And Temperature All The Three States I.e., Water, Ice And Vapour Exist Simultaneously.

0 votes
0 Answer
395 views

In Van Der Waals Equation Of State Of The Gas Law, The

Modified 298 Year Ago

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298 Year Ago

In Van Der Waals Equation Of State Of The Gas Law, The

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