Acids Bases And Salts No 19 Class 7 Online Worksheet Activities - Free Printable

To solve this problem, we need to identify the primary taste associated with each substance listed in the table. Most of these are common household items or foods, so we can determine their taste based on everyday experience.

Let’s go through each one:

1. Lemon juice – Lemons are known for being very sour due to citric acid.
2. Orange juice – Oranges are sweet but also have a tangy/sour note; however, commercially available orange juice is mostly sweet. We’ll say “sweet” as the dominant taste.
3. Vinegar – Vinegar is acidic and tastes sharply sour.
4. Curd (yogurt) – Curd has a mild sour taste due to lactic acid from fermentation.
5. Tamarind (imli) – Tamarind is famously sour, often used in cooking for its tart flavor.
6. Sugar – Sugar is the classic example of something that tastes sweet.
7. Common salt – Salt tastes salty — that’s its defining characteristic.
8. Amla (Indian gooseberry) – Amla is extremely sour, though sometimes described as bitter-sour. But primarily, it’s known for its strong sourness.
9. Baking soda – Baking soda has a bitter, soapy taste if tasted directly (though we don’t usually eat it plain).
10. Grapes – Most grapes are sweet, especially when ripe. Some varieties may be slightly tart, but “sweet” is the main taste.
11. Unripe mango – Unripe mangoes are very sour and sometimes astringent. Sour is the dominant taste here.

Now let’s fill in the table accordingly:

| Substance | Taste (sour/bitter/any other) |
|-------------------|-------------------------------|
| Lemon juice | sour |
| Orange juice | sweet |
| Vinegar | sour |
| Curd | sour |
| Tamarind (imli) | sour |
| Sugar | sweet |
| Common salt | salty |
| Amla | sour |
| Baking soda | bitter |
| Grapes | sweet |
| Unripe mango | sour |

Note: For “orange juice,” some might argue it’s “tangy” or “sour-sweet,” but since the options given are “sour/bitter/any other,” and “sweet” falls under “any other,” we use “sweet.” Similarly, “salty” is not explicitly listed in the column header, but it’s implied under “any other.”

Final Answer:
Lemon juice: sour
Orange juice: sweet
Vinegar: sour
Curd: sour
Tamarind (imli): sour
Sugar: sweet
Common salt: salty
Amla: sour
Baking soda: bitter
Grapes: sweet
Unripe mango: sour