21.

Which one of the following statement is not true about vitamins?

• They were named by Funk

• They are vital for life

• Their deficiency causes disease

• They help in digestion

Vitamin containing metal atom is

• Vitamin- C

• Vitamin-B₁₂

• Vitamin-B

• Vitamin -A

Read the following examples from daily life and select the appropriate option.

1. When food gets spoiled, it produces a foul smell.
2. A slice of apple acquires brown colour when kept out for some time.
3. When an ant bites, calamine is used to ease the irritation on the skin.

• B is a physical change

• A and B are physical changes

• All are chemical changes

• A and B represent chemical changes

Consider the following edible plants

1. Banana
2. Brinjal
3. Lady's finger
4. Pumpkin

Select from these a pair of plants that has two or more than two edible parts.

• C and D

• B and C

• A and D

• A and B

Which one of the following acids is present in Vitamin C?

• Citric acid

• Ascorbic acid

• Lactic acid

• Folic acid

Eyes of potato are useful for

• nutrition

• respiration

• reproduction

• vegetative propagation

Person taking rich diet of ascorbic acid will not suffer from

• Rickets

• Pellagra

• Scurvy

• Beri-beri