Which of the following involves the decomposition enzymic action?
A. Esterification B. Fermentation C. Dehydration D. Polymerization E. Saponification Correct Answer: Option B – Fermentation
When iron rusts, it undergoes?
A. deliquescence B. chemical decomposition C. hydrolysis D. redox reaction E. combustion Correct Answer: Option D – redox reaction
What is the change in the oxidation number of phosphorus in the the reaction represented by the following equation? 4P (s) + 5O2 (g) → 2P2O5(g)
A. 0 to + 2 B. 0 to 5 C. +4 to + 2 D. +4 to +5 E. +4 to +7 Correct Answer: Option B = 0 to 5
What is the following compounds will not decompose when heated strongly?
A. NaHCO3 B. K2CO3 C. MgCO3 D. Ca(HCO3)2 E. ZnCO3 Correct Answer: Option B – K2CO3Products
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