PLEASE HELP
Class 9
( Chemistry )
1. Explain endothermic and exothermic reaction with examples
2. Prepare formulas of sodium , potassium , cupric , ferric , magnesium with the help following radicals
a. Hydroxide
b. Carbonate.
c. Hydrogen carbonate
d. Chloride
e. Oxide
f. Sulphide
g. Nitrate
h. Phosphate
3.Why we consider respiration as exothermic reaction? Explain.
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Explanation:
the endothermic reactions absorb energy from the surrounding that is in the form of heat. While, the exothermic reaction releases energy into the surrounding from the system. A popular example of endothermic chemical reaction is photosynthesis.
Respiration is considered as exothermic reaction because energy is released in this process. Glucose combines with oxygen present in our cells to form carbon dioxide and water along with energy.
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