GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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0-6.9
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7.1-14
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0-14
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7
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Detailed explanation-1: -The standard value of an acid on a pH scale is between 0-7 while the substances that are basic have the value ranging between 7-14.
Detailed explanation-2: -The solutions with pH values between 7 and 14 are basic in nature.
Detailed explanation-3: -Anything below 7.0 (ranging from 0.0 to 6.9) is acidic, and anything above 7.0 (from 7.1 to 14.0) is alkaline. The blood in your veins is slightly alkaline (pH = 7.4).
Detailed explanation-4: -Remember, a pH of 7.0 is neutral. Anything above that (7–14) is basic, and anything below that (0–6) is acidic. The pH of lemon juice is about 2.0, whereas tomato juice’s pH is about 4.0.
Detailed explanation-5: -A solution of a strong alkali, such as sodium hydroxide, at concentration 1 mol dm−3, has a pH of 14.