Give scientific reason.(Any one) a.Copper and brass vessels are cleaned with lemon . b. A solid matter has the properties of definite shape and volume.
Answers
Answer:
1. Copper and brass vessels form a basic layer of their oxide on them when cleaned with lemon which has citric acid , neutralizes the reaction.
2. A solid matter has a definite shape and volume because there the molecules are tightly bonded and have less inter molecular space and more inter molecular fore amongst them.
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1. Copper undergoes oxidation in the air to form black copper oxide. Copper oxide reacts slowly with carbon dioxide in air and gives a green coat. This green substance is called copper carbonate.
Lemon contains acid. The acid dissolves the green coating of basic copper carbonate present on the surface of tarnished copper and brass vessels and makes them shiny again.
2. The force of attraction between the particles of matter is intermolecular force. The particles of solid are very close to each other and vibrate at the fix positions. Due to this, a solid matter has the properties of definite shape and volume.
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