Latest Science and Technology General Knowledge(GK) Questions and answers

1 .

A level of atmosphere which is composed partly of electrons and positive ions is called

A)

Troposphere

B)

Mesosphere

C)

Ionosphere

D)

Stratosphere

Correct Answer : Ionosphere

The layer of atmosphere composed of ionic gaseous molecules helping in propagation of radio waves is Ionosphere. It is the 2nd layer from the top. It ranges from 60km. to 1000km. It also protects Earth from meteorites.

2 .

Choose the most appropriate answer:Lines joining places of equal temperature are called

A)

Isotherms

B)

Isohyets

C)

Isomers

D)

Isobars

Correct Answer : Isotherms

Lines joining places of equal temperature are called isotherms.

3 .

Energy is stored in liver and muscles in the form of

A)

Fat

B)

Glycogen

C)

Protein

D)

Carbohydrate

Correct Answer : Glycogen

Glucose is the main source of fuel for our cells. When the body doesn't need to use the glucose for energy, it stores it in the liver and muscles. This stored form of glucose is made up of many connected glucose molecules and is called glycogen.

4 .

Which of the following does not belong to vitamin B complex group

A)

Riboflavin

B)

Thiamine

C)

Ascorbic acid

D)

Folic acid

Correct Answer : Ascorbic acid

5 .

Which of the following is a common refrigerant used in domestic refrigerator

A)

Freon

B)

Neon

C)

Oxygen

D)

None of the above

Correct Answer : Freon

6 .

Uranium 235 has

A)

235 Protons

B)

235 Neutrons

C)

235 Electrons

D)

235 Protons and Neutrons together

Correct Answer : 235 Protons and Neutrons together

The nucleus of the U-235 atom comprises 92 protons and 143 neutrons (92 + 143 = 235).

7 .

In fireworks, the green flame is produced bacuse of

A)

Bromine

B)

Potassium

C)

Barium

D)

Phosphorus

Correct Answer : Barium

8 .

The most common Salt in the sea water is

A)

Sodium Sulphate

B)

Sodium Chloride

C)

Calcium Carbonate

D)

Potassium Chloride

Correct Answer : Sodium Chloride

9 .

Concave mirrors are used as shaving mirrors because they

A)

never produce inverted images

B)

produce magnified images

C)

do not distort images

D)

always produce real images

Correct Answer : always produce real images

10 .

In plants, phosphorus is mainly used for

A)

Leaf growth

B)

Root growth

C)

Flowering

D)

Leaf and root growth

Correct Answer : Leaf growth

Phosphorus (P) is vital to plant growth and is found in every living plant cell. It is involved in several key plant functions, including energy transfer, photosynthesis, transformation of sugars and starches, nutrient movement within the plant and transfer of genetic characteristics from one generation to the next.