Question : Which of the following is a conductor of electricity?
Option 1: Rubber
Option 2: Pure water
Option 3: Saltwater
Option 4: Benzene
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Correct Answer: Saltwater
Solution : The correct answer is Saltwater.
Saltwater conducts electricity more effectively than pure or "normal" water. When salt (sodium chloride, NaCl) is dissolved in water, ions are dissolved in the solution, especially sodium (Na+) and, chloride (Cl-) ions. As a result, the solution has a higher conductivity.
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Question : Which of the following is not a plantation crop?
Option 2: Tea
Option 3: Coffee
Option 4: Wheat
Question : Which of the following is the first man-made plastic that is a bad conductor of heat?
Option 1: Teflon
Option 2: Polythene
Option 3: Bakelite
Option 4: Nylon
Question : Which one of the following is not a major component of the biotic environment?
Option 1: Plants
Option 2: Animals
Option 3: Decomposers
Option 4: Water
Question : Which of the following fuels is the largest contributor to the generation of electricity in India?
Option 1: Nuclear energy
Option 2: Diesel
Option 3: Coal
Option 4: Natural gas
Question : Which of the following is not a water harvesting method used in Rajasthan?
Option 1: Johads
Option 2: Khadins
Option 3: Guls or Kuls
Option 4: Taanka
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