Single correct option
Consider the following statements.
1. Pure distilled water is a good conductor of electricity.
2. Dissolving common salt in water makes it conduct electricity.
Which of the statements given above is/are correct?
1. Pure distilled water is a good conductor of electricity.
2. Dissolving common salt in water makes it conduct electricity.
Which of the statements given above is/are correct?
- A. 1 only
- B. 2 only
- C. Both 1 and 2
- D. Neither 1 nor 2
Show answer and solution
Answer: (B) 2 only
Pure water has almost no free ions, so it is a very poor conductor and statement 1 is wrong. Sodium chloride dissociates into Na+ and Cl- ions in water, and these mobile ions carry current, so statement 2 is correct. This is why tap water, which has dissolved salts, is dangerous around electrical appliances.
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