Advertisements
Advertisements
Questions
Fresh milk from cows has a pH of 6. So how does the pH change when this milk is turned to curd? Explain your answer.
Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.
Solution 1
The formation of lactic acid is what turns the milk into curd; therefore, it will result in the pH changing below 6.
Solution 2
The pH of milk is 6. As it changes to curd, the pH will reduce because curd is acidic in nature. The acids present in it decrease the pH.
APPEARS IN
RELATED QUESTIONS
What effect does the concentration of H+ (aq) ions have on the nature of the solution?
Is the distilled water acidic/basic/neutral? How would you verify it?
Name an indicator which is red in acid solution but turns blue in basic solution.
Which of the following types of medicine is used for treating indigestion caused by over-eating?
(a) antibiotic
(b) analgesic
(c) antacid
(d) antiseptic
Which is more acidic : a solution of pH = 2 or a solution of pH = 6?
Two drinks P and Q gave acidic and alkaline reactions, respectively. One has a pH value of 9 and the other has a pH value of 3. Which drink has the pH value of 9?
Two solutions X and Y have pH = 4 and pH = 8, respectively. Which solution will give alkaline reaction and which one acidic?
Fill in the following blank with suitable words:
Alkalis have a pH.............. than 7.
How does a universal indicator work?
The pH values of three acids A, B and C having equal molar concentrations are 5.0, 2.8 and 3.5 respectively. Arrange these acids in order of the increasing acid strengths.
Name two common antacids.
A solution turns blue litmus red. Its pH is likely to be:
(a) 7
(b) 5
(c) 8
(d) 14
A solution turns phenolphthalein indicator pink. The most likely pH of this solution will be:
(a) 6
(b) 4
(c) 9
(d) 7
The pH values of five solutions A, B, C, D and E are given below:
A | 1 |
B | 5 |
C | 7 |
D | 11 |
E | 13 |
Which solution is weakly alkaline.
In basic solution turmeric indicator paper changes from yellow to _______.
Hibiscus flower is an example for natural indicator.
Which one of the following can be used as an acid- base indicator by a visually impared student?
State whether the following statements are true or false. Correct the false statements.
Phenolphthalein is a natural indicator.
Take a shirt with turmeric powder strain. Wash the shirt with soap. Do you observe any change in the colour? Why?