Question

An electric current can be conducted by _____. a sugar solution rubbing alcohol methane gas a salt solution

Answer 1

The answer is salt water.

Salt water can conduct electricity or we can say that an electric current is conducted by salt water as salt water is a good conductor of electricity when salt that is sodium chloride or NaCl is dissolved in water , positively charged sodium (Na⁺) and negatively charged chlorine(Cl⁻) molecules are set apart by the water molecule so that they can float easily and freely. We can define the conductivity of a substance as the mobility or movement of ions. So as in water, sodium and chlorine are set apart and can move freely so it become a electrolyte that can conduct electricity.

Answer 2

An electric current can be conducted by  $\boxed{\text{a salt solution}}$.

Further Explanation:

Electric current:

The movement of charge carriers (electrons or protons) or ions is termed as electric current. In other words, rate of flow of electric charge through a point. SI unit of electric current is Ampere (A).

On the basis of different abilities of substances to conduct electric current, these can be classified as follows:

Conductors:

These materials allow smooth flow of charge carriers without any resistance in their movement and therefore these conduct heat and electricity.

Insulators:

These materials allow resistance to flow of electric charge carriers and therefore act as bad conductors of heat and electricity.

Semiconductors:

These allow movement of electric charge carriers under certain conditions. These have electric conductivity less than that of conductors but more than insulators.

Sugar solution cannot produce any ions in solution. Since no charge carriers are present in sugar solution, it cannot conduct electric current.

Rubbing alcohol does not contain free ions in it and therefore it cannot conduct electric current.

Methane gas is covalent in nature and does not have any free ions in it so it cannot conduct electric current.

Salt solution is nothing but solution of NaCl in water. NaCl is ionic compound so ions are present in salt solution and therefore it conducts electric current.

Therefore electric current can only be conducted by salt solution.

Learn More:

1. How would you classify brass? brainly.com/question/9053565

2. The major contribution of Antoine Lavoisier to chemistry: brainly.com/question/2500879

Answer Details:

Grade: High School

Subject: Chemistry

Chapter: Metals and non-metals

Keywords: sugar solution, rubbing alcohol, methane gas, salt solution, electric current, electric charge carriers, conductors, insulators, semiconductors.