Common salt is obtained from sea water by: MCQ with Answer and Explanation

Explanation:
Specific conductance (conductivity) is the conductance of a 1 cm³ solution. It decreases with dilution because the number of ions per unit volume decreases. Equivalent conductance is the conductance of all ions produced by 1 gram equivalent of electrolyte. It increases with dilution because the ions have more space to move, reducing interionic attractions.

Explanation:
Graphite has a layered structure where each carbon is sp² hybridized, forming three sigma bonds with neighboring carbons, leaving one unhybridized p orbital electron delocalized over the entire layer. These mobile electrons allow electrical conduction parallel to layers. Diamond, with all four electrons in covalent bonds, is an insulator. Both the assertion and reason are correct, and the reason correctly explains the conductivity of graphite.

Explanation:
Nuclear fission is a reaction in which the nucleus of a heavy atom (like Uranium-235 or Plutonium-239) splits into two or smaller, lighter nuclei when bombarded by a neutron, releasing a massive amount of energy and more neutrons, potentially causing a chain reaction.