Rate of a Chemical Reaction and Factors Affecting the Rate of Reactions (Concentration, Temperature,... ) NEET Questions

Physical Chemistry - Chemical Kinetics

Rate of a Chemical Reaction and Factors Affecting the Rate of Reactions (Concentration, Temperature,... ) MCQ Questions


1.
The rate of a chemical reaction is defined as:
A.
The amount of heat liberated per unit time
B.
The total amount of product formed in a reaction
C.
The change in concentration of any reactant or product per unit time
D.
The time taken for a reaction to reach completion
😑 View Answer Rough Work Error
ANSWER :
C. The change in concentration of any reactant or product per unit time
2.
The SI unit of rate of a chemical reaction is:
A.
mol L⁻¹
B.
s⁻¹
C.
mol L⁻¹ s⁻¹
D.
L mol⁻¹ s⁻¹
😑 View Answer Rough Work Error
ANSWER :
C. mol L⁻¹ s⁻¹
3.
For the reaction N₂ + 3H₂ → 2NH₃, the rate of reaction in terms of disappearance of H₂ and appearance of NH₃ are related as:
A.
-(1/3) d[H₂]/dt = (1/2) d[NH₃]/dt
B.
-3 d[H₂]/dt = 2 d[NH₃]/dt
C.
-d[H₂]/dt = d[NH₃]/dt
D.
-(1/2) d[H₂]/dt = (1/3) d[NH₃]/dt
😑 View Answer Rough Work Error
ANSWER :
A. -(1/3) d[H₂]/dt = (1/2) d[NH₃]/dt
4.
For the reaction 2N₂O₅ → 4NO₂ + O₂, if the rate of formation of NO₂ is 2.8 × 10⁻³ mol L⁻¹ s⁻¹, the rate of disappearance of N₂O₅ is:
A.
1.4 × 10⁻³ mol L⁻¹ s⁻¹
B.
2.8 × 10⁻³ mol L⁻¹ s⁻¹
C.
7.0 × 10⁻⁴ mol L⁻¹ s⁻¹
D.
5.6 × 10⁻³ mol L⁻¹ s⁻¹
😑 View Answer Rough Work Error
ANSWER :
A. 1.4 × 10⁻³ mol L⁻¹ s⁻¹
5.
The instantaneous rate of a reaction is:
A.
The average rate during the entire reaction
B.
The rate at the start of the reaction
C.
The rate of reaction at a particular instant of time
D.
The rate over a finite interval of time
😑 View Answer Rough Work Error
ANSWER :
C. The rate of reaction at a particular instant of time
6.
The average rate of a reaction is calculated by:
A.
The instantaneous rate at t = 0
B.
Dividing rate constant by reactant concentration
C.
The slope of the tangent at any point on the concentration-time curve
D.
Δ[concentration] / Δ[time] over a finite time interval
😑 View Answer Rough Work Error
ANSWER :
D. Δ[concentration] / Δ[time] over a finite time interval