Question

At which concentration, phenol act as preservative
A0.2-0.5

B5-8

C0.05-0.1

D50-80​

Answer 1

Answer:

1. To understand roads and subways at new places.
2. To calculate distance between two places.
3. To know whether there are two or more paths to the same place and which is the shortest.
4. We can get information about mountains, rivers, valleys or any other thing, which may come on the way, and we can prepare for that.

Answer 2

Option A: Phenol acts as a preservative in the range of 0.2 to 0.5%

• Preservatives are chemical substances used to store food without spoilage.
• In addition to this, they help in maintaining the freshness and appearance of foods.
• There are two kinds of preservatives: Natural preservatives and artificial preservatives.
• Examples of natural preservatives are oil, salt, sugar, etc.
• Examples of artificial preservatives are: Sorbic acid, phenol etc
• If used within the limits they are excellent food preservatives.