Question

Q.4 Study the given table and answer the following questions. The table shows the pH value of plaque
surrounding the teeth of a child over 3 hours.
pH
7.0
Time/h.
0.0
1.0.
2.0.
3.0.
4.0.
7.2​

Answer 1

Answer:

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Answer 2

the question incomplete i will provide the full question at the below,

Answer:

(a) The three constituents of plaque other than  food are acid, saliva and bacteria.    

(b) Time 4.0, lowest pH indicate the highest  amount of acid produced        

   by the bacteria.

Question:

Study the given table and answer the following questions. The table shows the pH value of plaque surrounding the teeth of a child over 3 hours.

  time/hr                                                      pH

    0.0                                                           7.0

   01.0                                                           7.0

   02.0                                                          7.1            

   03.0                                                          7.2

   0.40                                                          4.1

find,

(a) Other than food remains, state three    constituents of plaque.                  (b) State the time during the day when   condition most favourable for process  of tooth decay.