Rate Law NEET Questions

Physical Chemistry - Chemical Kinetics

Rate Law MCQ Questions


7.
The general unit of rate constant for an nth order reaction is:
A.
(mol L⁻¹) s⁻¹
B.
(mol L⁻¹)^n s⁻¹
C.
(mol L⁻¹)^(1-n) s⁻¹
D.
(mol L⁻¹)^(n-1) s⁻¹
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ANSWER :
C. (mol L⁻¹)^(1-n) s⁻¹
8.
Rate law expression for a reaction is determined by:
A.
Experimental data only
B.
Molecularity of the reaction
C.
Stoichiometric coefficients of balanced equation
D.
Order of the reactants in the equation
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ANSWER :
A. Experimental data only
9.
For the reaction aA + bB → products, rate = k[A]ˣ[B]ʸ. The overall order of the reaction is:
A.
a + b
B.
x + y
C.
x × y
D.
a × b
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ANSWER :
B. x + y
10.
The rate law for the reaction 2NO + O₂ → 2NO₂ is found to be Rate = k[NO]²[O₂]. The order of the reaction is:
A.
3
B.
1
C.
2
D.
4
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ANSWER :
A. 3
11.
Which of the following statements about order of reaction is correct?
A.
Order can be zero, fractional, or negative
B.
Order is always a whole number
C.
Order cannot be zero
D.
Order is always equal to molecularity
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ANSWER :
A. Order can be zero, fractional, or negative
12.
Molecularity of a reaction is:
A.
The number of reacting species (molecules, atoms or ions) involved in an elementary reaction
B.
Always equal to order of reaction
C.
The sum of powers of concentration in rate law
D.
The number of products formed
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ANSWER :
A. The number of reacting species (molecules, atoms or ions) involved in an elementary reaction