Question

Explain (ANY THREE)






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Answer 1

1. Displacement reactions. Displacement reactions involve a metal and a compound of a different metal. In a displacement reaction: a more reactive metal will displace a less reactive metal from its compounds.
2. A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.
3. An endothermic process is any process which requires or absorbs energy from its surroundings, usually in the form of heat. ... The opposite of an endothermic process is an exothermic process, one that releases, "gives out" energy in the form of heat.

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Answer 2

Answer:

BALANCED EQUATION MEANS AN CHEMICAL EQUATION WHICH IS BALANCED. EXAMPLE

2H2 + O2 → 2H2O