Guys plzzz answer these all questions lil fastt
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Answer:
1) Exothermic reactions are those reactions in which heat is evolved during the reaction.
All combustion reactions are Exothermic reactions.
Example-CH4 reacting with O2 and giving us CO2 and H2O
2) Paint is applied on iron articles to prevent its rusting. Paint creates a layer over iron articles and thus prevents it's contact with moist air and water and hence no rusting takes place.
3) A balanced chemical equation is a equation which has equal no. of atoms of all the elements in the product side and reactants side.
4) The question is not clear.
5) The water of crystallization means having a fixed number of molecules present in one formula of a unit of salt.
6) Plaster of Paris is used to set fractured bones at right place.
7) Methanoic acid or Formic acid.
8) Gold
9) Silver followed by Copper
10) 3Fe+4H2O⟶Fe3O4+4H2(g)
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