Question

please answer urgent ​

Answer 1

1.A chemical transition is the result of a chemical reaction, whereas a physical change is when the structure of matter changes, but not the chemical identity. Burning, cooking, rusting, and rotting are examples of chemical changes.

2.when iron nails immersed in cuso4 solution the blue solution of hydrated copper sulphate turns into green solution of ferrous sulphate with a brown coloured precipitate copper. CuSo4 + Fe = FeSo4 + Cu.

3.The equation for the reaction is: CH3COOH + NaHCO3 = CH3COONa + CO2 + H2O. Baking soda and vinegar react with each other because they exchange atoms.

4.Ca(OH) 2+CO 2 →CaCO 3 +H2 O

When carbon dioxide is passed through lime water, it turns milky due to formation of white precipitate in form of calcium carbonate.

hope it helps