3.
Answer question numbers 3(a) to 3(d)on the basis of your understanding of
the following table and related studied concepts.
The metal sodium reacts vigorously with water. A student made to react sodium
with water and measured the volume of gas at intervals of 30 seconds. The results
are shown below.
Time/s 0 30 60 90 120 | 150 | 180
Volume/cm3 0 40 60 74 86 96 104
a) At what time interval the rate of reaction was the fastest?
b) Name the gas liberated in the reaction. Write the reaction involved.
c) How will you test this gas?
d) What will be the colour of universal indicator when added to the solution
formed? What does it show?
(1)
(1)
(1)
(1)
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