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Kinetics Study on the Reaction between Potassium iodate and Sodium Sulphite
Kinetics Study on the Reaction between Potassium iodate and Sodium Sulphite
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1)
Which one of the following solutions is used as an indicator of the reaction between iodate ions and sulphite ions?
Phenolphthalein
Methyl orange
Sulphuric acid
Starch solution
2)
How can we estimate the rate of the reaction between potassium iodate and sodium sulphite using the starch solution as indicator?
By measuring the time taken for the appearance of the blue color.
From the volume of starch solution.
By measuring the time take for the formation of iodide ions.
From the volume of distilled water.
3)
Which one of the following complexes is responsible for the blue colour obtained in the reaction between iodate ions and sulphite ions using a starch indicator in an acidic medium?
Starch – Sulphite complex
Iodate – Sulphite complex
Starch – Iodate complex
Starch – Iodine complex
4)
Which one of the following acids is used to make the medium acidic in the experiment between iodate ions and sulphite ions?
Lactic acid
Acetic acid
Sulphuric acid
Oxalic acid
5)
What is the nature of the graph obtained by plotting Time for the appearance of blue colour Vs 1/volume of KIO₃?
Hyperbola
Straight sloping line
Parabola
Straight line with zero slope
6)
In which medium does the reaction between potassium iodate and sodium sulphite takes place?
Slightly alkaline
Acidic
Neutral
Highly alkaline
7)
Which ions are formed when sulphite ions react with iodate ions in an acidic medium?
I⁻
SO₃⁻
IO₃⁻
SO₃²⁻
8)
What is observed when potassium iodate reacts with sodium sulphite using a starch indicator in an acidic medium?
Appearance of turbidity
Appearance of blue color
Appearance of yellow oily layer
No characteristic change
9)
In which reaction does the following composition give a blue coloration?
Iodate ion, H₂SO₄, Starch solution, Sulphite ion
Iodate ion, Starch solution, Sulphite ion
Iodate ion, H₂SO₄, Starch solution
Iodate ion, H₂SO₄, Sulphite ion
10)
Consider a general reaction of a type, xA + yB → С. Which one of the following represents the rate of the reaction?