The ions present in acids are

hydrogen ions

Explanation:

H+ or hydrogen ions are present in acids

Acids are those substances that produce H+ ion when dissolve in solution.

Explanation:

Ions in acids depend on the compound which is being dissolved in solution.

For e.g. When NaCl is dissolved in water, it produce Two Ions;

Na+ and Cl-

If there are more H+ ions in Solution then it will be acidic.

If there are more OH- ions in solution then it will be basic.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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