The questions in the image are already solved correctly. Here is a summary of the answers provided:
Q37. How Dorji can decide which drink to serve:
Dorji can use red and blue litmus paper to test the drinks:
1.
Neutral drink: The drink that does not change the color of either red or blue litmus paper.
2.
Basic drink: The drink that turns red litmus paper blue.
3.
Acidic drink: The drink that turns blue litmus paper red.
Q38. Completed Table:
| Found in | Name of acid |
| :--- | :--- |
| Vinegar | Acetic acid |
| Ant’s sting | Formic acid |
| Citrus fruits such as oranges, lemons, etc. | Citric acid |
| Curd | Lactic acid |
| Spinach | Oxalic acid |
| Amla, Citrus fruits | Ascorbic acid (Vitamin C) |
| Tamarind, grapes, unripe mangoes, etc. | Tartaric acid |
Parent Tip: Review the logic above to help your child master the concept of worksheets acids bases and salts.
