Consider the following statements regarding a motor car battery: I. The voltage is usually 12 V. II. Electrolyte used is hydrochloric acid. III. Electrodes are lead and copper. IV. Capacity is expressed in ampere-hour. Which of the above statements are correct?
- AI and II
- BII and III
- CIII and IV
- DI and IVCorrect
Explanation
The correct answer is D because of the following reasons:
Statement I is correct: Standard motor car batteries are lead acid batteries that typically provide a nominal voltage of 12 Volts.
Statement II is incorrect: The electrolyte used in a car battery is dilute sulfuric acid, not hydrochloric acid.
Statement III is incorrect: The electrodes are made of lead and lead dioxide, not copper. Lead acts as the negative electrode while lead dioxide acts as the positive electrode.
Statement IV is correct: Battery capacity represents the amount of electric charge it can deliver, which is measured in Ampere-hours.
Therefore, only statements I and IV are accurate.
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