Questions

About 71% of the earth's surface is covered with water. In that 71% only 4% of water is a fresh water.

Brass, Bronze and Steel is a metallic alloy made up of two or more chemical element. But Silver a chemical element with symbol Ag and atomic number 47.

Since, the starting statement carries a subject; the next statement will carry a verb i.e. Q follows as it mentioned the discovery of the Regent. R will bethe continuing statement which states what he actually discovered. P follows next as it talked about the reaction of the Regent after the discovery. And S would be the concluding statement and thus form a coherent paragraph.

The correct formation would be, ‘The Regent having discovered that he had imprisoned an innocent man released Voltaire and gave him a pension.’

SO2 has a net dipole moment and has a bent shape in its structure as water molecule. Hence it is a polar molecule.