In a lab about the activity series, a solution of copper(ii)chloride is placed in a test tube with zinc metal. if zinc is higher up on the activity series, it will produce a reaction and replace the copper. bits of copper are seen in the bottom of the test tube. a good conclusion would be? a) zinc is lower on the activity series because there is no evidence of a reaction. b) zinc is higher on the activity series because there is no evidence of a reaction. c) zinc is lower on the activity series because there is clear evidence of a reaction. d) zinc is higher on the activity series because there is clear evidence of a reaction.

Option D, Zinc is higher on the activity series because there is clear evidence of a reaction.

Explanation:

It is very clear that a metal which is higher in activity will replace a metal having lower activity.  

Since, Zinc has higher activity than copper, it is very sure that it in a copper chloride solution it will replace copper and produce zinc chloride solution leaving behind copper as residue.  

Residues of copper is a clear evidence of reaction  

The chemical equation for this reaction would be -

Hence, option D is correct

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photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.