Q8-separate physical and chemical changes
Growth of plant
Burning of paper
Freezing of water
Rusting of iron
Digestion of food
Making of lemonade.
Q9-a) define law of conservation of mass and law of
b) write any two postulate of Dalton atomic theory.
Q10-composition of nuclei of to atomic species x and
X.
Y
Protons,
6.
6
Neutrons. 6.
8
Give mass number of X and y how are they related to
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Growth of plant-Chemical change
Burning of paper-Chemical change
Freezing of water-Physical change
Rusting of iron-Chemical change
Digestion of food-Chemical change
Making of lemonade-Chemical change
Q9)a)The law of conservation of mass states that matter can neither be created nor be destroyed. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
b)All matter consists of indivisible particles called atoms.
Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements.
Q10)The mass number of X is 12 i think
Hope it helps but not sure about the Q10
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sorry i don't know 9th question rest are here
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