21.

Which one of the following takes place when water transforms from liquid to gaseous phase?

• Distance between the particles change

• The color of the particles change

• Size of the particles change

• Structure of the particles change

Which fuel has the highest calorific value from among the following?

• Diesel

• Hydrogen

• Coal

• Petrol

Match the following

Column A

1. Lactobacillus
2. Protozoan
3. Rhizobium
4. Virus

Column B

1. Nitrogen fixation
2. AIDS
3. Malaria
4. Curd formation

The correct matching is

• A - 1

  B - 2

  C - 3

  D - 4

• A - 1

  B - 4

  C - 3

  D - 2

• A - 4

  B - 3

  C - 1

  D - 2

• A - 4

  B - 1

  C - 2

  D - 3

Select the correct statement from among the following.

• Plants with green leaves only carry out photosynthesis

• Photosynthesis takes place only in leaves

• Irrespective of colour, all leaves carry out photosynthesis

• Plants can carry out photosynthesis even without chlorophyll

Reema tells her friend that Ladyfinger is a fruit. Her friend Shahana disagrees with her. Which one of the following statements is true?

• Ladyfinger has seeds, thus it is a fruit

• Ladyfinger has seeds, thus it is a vegetable

• Ladyfinger is a vegetable, hence it cannot be a fruit

• Ladyfinger is eaten in cooked form, hence it is a vegetable

Which hormone in our body helps us to adjust to stress when we are angry, embarrassed, or worried?

• Insulin

• Estrogen

• Thyroxine

• Adrenaline

Match the following

Column I

1. Root
2. Stem
3. Seed
4. Fruit

Column B

1. Groundnut
2. Apple
3. Sugarcane
4. Carrot

The given choices are

• A - 1

  B - 4

  C - 3

  D - 2

• A - 3

  B - 2

  C - 4

  D - 1

• A - 4

  B - 3

  C - 1

  D - 2

• A - 2

  B - 1

  C - 4

  D - 3

Which one of the following represents a group of human diseases caused by viruses?

• Measles, Polio, Typhoid

• Measles, Typhoid, Tuberculosis

• Measles, Chickenpox, Hepatitis-A

• Chickenpox, Malaria, Hepatitis-A

Which one of the following represents a group of autotrophs?

• Spinach, Mushroom, Tomato, Yeast

• Tulsi, Algae, Cuscuta (Dodder), Mushroom

• Algae, Spinach, Tomato, Banana

• Algae, Cuscuta (Dodder), Banana, Mango

Human Nutrition includes the nutrient requirement, mode of intake of food, and its utilization in the body occurring in various steps which are

1. Absorption
2. Egestion
3. Assimilation
4. Ingestion
5. Digestion

Arrange these steps in sequence as they occur inside the body

• 5, 4, 3, 1, 2

• 4, 1, 2, 3, 5

• 1,2,3,4,5

• 4,5,1,3,2