Question : Which of the following has pH value 7 ?
Option 1: Pure Water
Option 2: H2SO4
Option 3: Sodium carbonate
Option 4: HCl
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Correct Answer: Pure Water
Solution : The correct option is pure water.
A substance having a pH of 7 is regarded as neutral. It has neither acidic or alkaline (basic) properties. A material with a pH value of 7 is pure water at room temperature. The point of neutrality is represented by a pH of 7. H2SO4 (Sulfuric Acid): 1 (very acidic); HCl (Hydrochloric Acid): Near zero (very acidic);Sodium carbonate (Na2CO3): 11-12 (Moderately alkaline)
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