what cause the colour change in this solution explain
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21
Explanation:
The tip of the minute hand describes in 120° degrees of rotation, the third of the circular perimeter, 1/3 x Pi x diameter, so the answer is 2x9 /3x Pi = 6Pi, about 18.85 inches.
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12
Answer:
Blue colour of the copper sulphate solution changes into green colour & then iron nail acquires a brownish look. This is because that iron is more reactive than copper.
The following chemical reaction takes place in this activity.
Fe+CuSO4→FeSO4+Cu
In this reaction, iron displaces copper from CuSO4 solution.
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