Option D is correct..... Because distilled water is pure form of H2O and H2O do not conduct electricity as it doesn't give H + ions and OH- ions ........

**Distilled water** does not conduct electricity. Distilled water is water that has been purified through the process of distillation, which involves boiling the water and then condensing the steam into a separate container. This process removes impurities and minerals from the water, resulting in highly pure water.

**Explanation:**

**Conductivity of substances**

Conductivity is the ability of a substance to conduct electricity. Substances that conduct electricity are called conductors, while substances that do not conduct electricity are called insulators.

**Factors affecting conductivity**

The conductivity of a substance depends on the presence of charged particles, such as ions or electrons, that can carry electric current. In general, substances that contain ions or free electrons are good conductors of electricity.

**a) Sodium hydroxide**

Sodium hydroxide, also known as caustic soda, is an ionic compound. It dissolves in water to form sodium ions (Na+) and hydroxide ions (OH-). These ions are capable of carrying electric current, so sodium hydroxide is a good conductor of electricity.

**b) Rainwater**

Rainwater is a natural form of water that is collected from rainfall. It contains various impurities and dissolved substances that can affect its conductivity. Rainwater can contain ions such as calcium, magnesium, and chloride, which are derived from atmospheric gases and pollutants. These ions can contribute to the conductivity of rainwater, although it is generally considered a poor conductor of electricity compared to other substances.

**c) Hydrochloric acid**

Hydrochloric acid is an acidic solution composed of hydrogen ions (H+) and chloride ions (Cl-). These ions are capable of carrying electric current, so hydrochloric acid is a good conductor of electricity.

**d) Distilled water**

Distilled water is highly pure water that has been stripped of impurities and minerals through the process of distillation. During distillation, all ions and charged particles are removed, leaving behind only H2O molecules. Since distilled water does not contain any ions or free electrons, it does not conduct electricity. Therefore, distilled water is a poor conductor of electricity and is often used in experiments or industries where the presence of impurities can interfere with the desired results.

In conclusion, among the given options, distilled water does not conduct electricity due to its lack of ions or free electrons.