# The pH values of

a. Blood is slightly alkaline in nature.

A neutral solution has a pH of exactly 7, while an acidic solution has a pH less than 7 and a basic solution has a pH more than 7. Since the blood has a pH value of 7.36, it is alkaline in nature but we can say it only slightly alkaline.

b. The pH value decreases when milk changes to curd.

The process of conversion of milk into curd involves the formation of lactic acid. This lactic acid makes the curd more acidic than milk. On pH scale the acidity increases with the decrease in pH value. Thus pH value decreases from 6.3 to 4.5 when milk changes into curd.

c. i) Lime water is strongly alkaline.

The pH scale varies from 0 to 14. A neutral solution has a pH of exactly 7. Acidic solution has a pH less than 7 and basic solution has a pH greater than 7.

General rule: Lesser the pH more will be acidity.

OR

More the pH more will be alkalinity.

Since lime water has a pH of 10.5 (which is much greater than 7), so it is strongly alkaline.

ii) Milk has the weak acidic nature.

Both milk and vinegar has a pH less than 7 so both are acidic in nature. But milk has a pH slightly less than 7 (6.3) while vinegar has a pH which is much lower than 7 (4.2). Therefore, milk has weak acidic nature as compared to vinegar.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Sphere and Hemisphere42 mins
Introduction to Lines and Angles60 mins
Speed and Velocity42 mins
Arc of Circle And Related IMP Qs40 mins
Surface Area and Volume of solids Revision43 mins
IMP Theorems And Their Application43 mins
Circles- All kinds of Questions36 mins
Variation in g due to Height and Depth33 mins
Trigonometric Identities - Marathon Part 146 mins
Test what you Know Quiz44 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :

A little distilleKerala Board Chemistry Part II

The pH values of Kerala Board Chemistry Part II