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Displacement and Double Displacement Chemical Reactions Video Lecture | Extra Documents, Videos & Tests for Class 10

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FAQs on Displacement and Double Displacement Chemical Reactions Video Lecture - Extra Documents, Videos & Tests for Class 10

1. What is displacement in chemical reactions?
Ans. Displacement in chemical reactions refers to the process where one element is replaced by another element in a compound. It occurs when a more reactive element displaces a less reactive element from its compound.
2. What is a double displacement reaction?
Ans. A double displacement reaction is a type of chemical reaction where two compounds exchange their ions to form new compounds. It involves the exchange of positive ions (cation) between the compounds.
3. Can you provide an example of a displacement reaction?
Ans. Yes, an example of a displacement reaction is when zinc (Zn) reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2). The chemical equation for this reaction is: Zn + 2HCl -> ZnCl2 + H2.
4. How can we identify a double displacement reaction?
Ans. Double displacement reactions can be identified by the formation of a precipitate (a solid) or a gas, or by the exchange of ions between the compounds. A precipitate is a solid that forms when two solutions are combined, indicating the occurrence of a double displacement reaction.
5. What are some everyday examples of displacement and double displacement reactions?
Ans. Everyday examples of displacement reactions include the rusting of iron (Fe) when exposed to air and moisture, the reaction between magnesium (Mg) and hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and hydrogen gas (H2). An example of a double displacement reaction is the reaction between silver nitrate (AgNO3) and sodium chloride (NaCl) to form silver chloride (AgCl) and sodium nitrate (NaNO3).
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