Kinetic Study of the Reaction of Iodide Ions with Hydrogen Peroxide at Room Temperature NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Kinetic Study of the Reaction of Iodide Ions with Hydrogen Peroxide at Room Temperature MCQ Questions


1.
Chemical kinetics deals with:
A.
Equilibrium constants only
B.
Heat changes only
C.
Solubility of substances
D.
Rate of chemical reactions and the factors affecting it
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ANSWER :
D. Rate of chemical reactions and the factors affecting it
2.
Rate of a chemical reaction is generally expressed as:
A.
Change in pH with volume
B.
Change in concentration of reactant or product per unit time
C.
Mass of solute per litre of solvent
D.
Change in pressure with temperature
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ANSWER :
B. Change in concentration of reactant or product per unit time
3.
For the reaction H2O2 + 2I⁻ + 2H⁺ → I2 + 2H2O, the rate may be expressed as:
A.
Rate = +d[H2O2]/dt
B.
Rate = −d[H2O2]/dt = −(1/2) d[I⁻]/dt = +d[I2]/dt
C.
Rate = +d[I⁻]/dt
D.
Rate = −d[I2]/dt
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ANSWER :
B. Rate = −d[H2O2]/dt = −(1/2) d[I⁻]/dt = +d[I2]/dt
4.
Average rate of reaction is calculated by:
A.
Initial concentration / final time
B.
Sum of all concentrations divided by total time
C.
Δ[concentration] / Δt over a finite time interval
D.
d[concentration] / dt at one instant
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ANSWER :
C. Δ[concentration] / Δt over a finite time interval
5.
Instantaneous rate is determined from concentration-time curve as:
A.
Y-intercept of the curve
B.
Area under the curve
C.
Length of the curve
D.
Slope (tangent) at a particular time
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ANSWER :
D. Slope (tangent) at a particular time
6.
Units of rate of reaction in SI are:
A.
mol L⁻¹ s⁻¹
B.
mol⁻¹ L⁻¹ s⁻¹
C.
L mol s⁻¹
D.
mol L s
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ANSWER :
A. mol L⁻¹ s⁻¹