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chemistry class 10
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Chemical reaction ⬇
.
zn+hcl➡zncl+h²
Dilute Sulphuric acid react with zinc granules.
When zinc dust is taken instead of zinc granules to react with sulphuric acid, the hydrogen gas is formed. ... Thus, when hydrochloric acid is used at the place of sulphuric acid, zinc chloride is formed in place of zinc sulphate; along with hydrogen gas and reaction takes place at the same rate.
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1. Zinc chloride and hydrogen gas are formed, when zinc granules are treated with hydrochloric acid. Similarly, hydrogen gas and zinc nitrate are formed when zinc granules are treated with nitric acid.
2. Exothermic Reaction : A chemical reaction that releases energy, usually in the form of heat.
Endothermic Reaction : A chemical reaction in which energy is absorbed
Example : Sara mixed water and calcium chloride. The reaction made the water turn cloudy. The temperature of the reaction went from 23 degrees C to 52 degrees C. Is the reaction exothermic or endothermic?
ANSWER : Exothermic
3. Rancidity is a condition in which the substance with oil and fats get oxidized when they are exposed to air. A substance is said to be rancid when there is a change in smell, taste, and colour. An example of rancidity is when a chips pack is exposed to atmospheric air which results in a change in taste and odor.
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