SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -The pH scale is often said to range from 0 to 14, and most solutions do fall within this range, although it’s possible to get a pH below 0 or above 14. Anything below 7.0 is acidic, and anything above 7.0 is alkaline, or basic.
Detailed explanation-2: -As you can see from the pH scale above, pure water has a pH value of 7. This value is considered neutral-neither acidic or basic.
Detailed explanation-3: -Ions are just atoms that have an electric charge on them, so H+ is a hydrogen atom with charge of 1. Even in pure water ions tend to form due to random processes (producing some H+ and OH-ions). The amount of H+ that is made in pure water is about equal to a pH of 7. That’s why 7 is neutral.
Detailed explanation-4: -While the pH scale typically runs from 0 to 14, it is definitely possible to calculate a negative pH. A negative pH occurs when the molarity of hydrogen ions in a strong acid is greater than 1 N (Normality).