Question

which one is odd one out if we have to check the ph level of the following- dilute HCl , lemon juice , soapy water , washing soda? something is wrong with any one of these

Answer 1

lemon juice because all others are synthetic
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Answer 2

washing soda is the answer because for checking pH level of anything we need the substance in its solution state everything else is in solution state except for washing soda
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