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Classify the following reactions as exot...

Classify the following reactions as exothermic or endothermic.
(i) electrolysis of water
(ii) burning of natural gas
(iii) decomposition of calcium carbonate
(iv) burning magnesium ribbon in air.

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(i) and (iii) - endothermic.
(ii) and (iv) - exothermic.
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ZEN PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-ZEN ADDITIONAL QUESTIONS SECTION (SHORT ANSWER [SA] TYPE 2 QUESTIONS )
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