SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The color changed on my shirt
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Physical change
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Chemical change
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -A change in color is also another characteristic of a chemical reaction taking place. For example, if one were to observe the rusting of metal over time, one would realized that the metal has changed color and turned orange. This change in color is evidence of a chemical reaction.
Detailed explanation-2: -Fading. Fading is caused by the chemical alteration of unstable dye molecules to a less strongly coloured or colourless form.
Detailed explanation-3: -Therefore, the reaction between iron and copper sulphate results in changing the blue colour of copper sulphate to a pale green. Fe ( s ) Iron + CuSO 4 ( aq ) ( blue ) Copper sulphate → FeSO 4 ( aq ) ( pale green ) Ferrous sulphate + Cu ( s ) Copper.
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