Which one of the following acids, is formed during the change of milk into curd?
Correct Answer:
(D)
Lactic acid
When pasteurized milk is heated to a temperature of 30-40oC or even at room temperature and a small amount of old curd or whey is added to it, the lactobacillus (bacteria) in that curd or whey sample starts to grow. They convert the lactose into lactic acid, which imparts the sour taste to curd.
Ques:
22
The predominant organic acid in grapes is –
Correct Answer:
(D)
Tartaric acid
Tartaric acid is the predominant organic acid in grapes. It is a white crystalline diprotic acid.
Ques:
23
For human nutrition, tomatoes are a rich source of
Correct Answer:
(C)
Citric acid
Tomato contains mainly citric acid and malic acid. Due to which, it also acts as ant-acid. It also contains oxalic acid which is found less in quantity.
Ques:
24
Which one of the following organic acids is abundant in grapes, tamarind and banana?
Correct Answer:
(D)
Tartaric acid
Tartaric acid is found in abundance in grapes, tamarind and banana. This acid is used as regulator and antioxidant in food items.
Ques:
25
Which acid is used in photography–
Correct Answer:
(B)
Oxalic acid
Oxalic acid is used in photography. Formic acid is found in ants. Citric acid is found in lemon and acetic acid is found in vinegar.