Q1. Assertion: Rusting of iron is an oxidation process.
Reason: Iron reacts with oxygen and moisture.

Q2. Assertion: Baking soda is used in fire extinguishers.
Reason: It releases carbon dioxide on heating.

Q3. Assertion: All acids contain hydrogen.
Reason: Hydrogen is responsible for acidic nature.

Q4. Assertion: Aluminium is used to make aircraft bodies.
Reason: Aluminium is light and corrosion resistant.

Q5. Assertion: Washing soda is used to remove permanent hardness of water.
Reason: It precipitates calcium and magnesium ions.

Q6. Assertion: Ethene undergoes addition reactions.
Reason: It is a saturated hydrocarbon.

Q7. Assertion: Soap does not work well in hard water.
Reason: It forms insoluble scum with calcium ions.

Q8. Assertion: Reactivity of metals increases down the group.
Reason: Atomic size increases down the group.

Q9. Assertion: Carbon forms a large number of compounds.
Reason: Carbon shows catenation.

Q10. Assertion: Bleaching powder is used to disinfect water.
Reason: It releases chlorine.