Right or Wrong, Science I, SSC, 10th Maharashtra,
Write right or wrong. If wrong, write the correct sentence.
Chapter No. 3: Chemical Reactions and Equations.
Cooking of a food is a chemical change.
Ans. Right.
The chemical formula of a compound can be changed during balancing a chemical equation.
Ans. Wrong.
Reason: The chemical formula of a compound cannot be changed during balancing a chemical equation.
When zinc dust is added to copper sulphate solution, a displacement reaction takes place.
Ans. Right.
When ferric ion is formed from ferrous ion, the positive charge decreases.
Ans. Wrong.
Reason: When ferric ion (Fe3+) is formed from ferrous (Fe2+) ion, the positive charge is increased by one unit.
The foul odour due to use of old, leftover cooking oil for making food stuff is called rancidity.
Ans. Right.
