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

1 .

Azadirachata indica is the scientific name of

A)

Neem

B)

Silver Oak

C)

Teak

D)

Tulsi

Correct Answer : Neem

Neem tree is mainly cultivated in the Indian subcontinent. Neem is a member of the mahogany family, Meliaceae. Today it is known by the botanical name Azadirachta indica.

2 .

Ozone hole is caused by chemicals like _____.

A)

Hydrogen Sulphide

B)

Nitrogen Oxide

C)

Carbon Monoxide

D)

Chloro Fluoro Carbon

Correct Answer : Chloro Fluoro Carbon

The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam- blowing agents (Chloro Fluoro Carbons (CFCs), HCFCs, halons), referred to as ozone-depleting substances (ODS).

3 .

Earth is the _______ planet from the Sun.

A)

First

B)

Third

C)

Fifth

D)

Seventh

Correct Answer : Third

Earth is the third planet from the Sun at a distance of about 93 million miles (150 million km).

4 .

Which of the following is NOT a metamorphic rock?

A)

Slate

B)

Schist

C)

Phyllite

D)

Diorite

Correct Answer : Diorite

5 .

Geospatial data can be obtained for the following

A)

Dynamic location on Earth

B)

Static location on Earth

C)

Both (a) and (b)

D)

None of the above

Correct Answer : Both (a) and (b)

6 .

What is the approximate circumference of earth?

A)

40,070 Km

B)

60,000 Km

C)

80,000 Km

D)

80,000 Km

Correct Answer : 40,070 Km

The Earth's circumference and radius, 40,070 km and 6378 km respectively, which have since been measured by orbiting spacecraft. The diameter of a circle is twice the radius, giving us a diameter for Earth of 12,756 km.

7 .

Which layer of earth is liquid?

A)

inner core

B)

outer core

C)

outer mantle

D)

crust

Correct Answer : outer core

The crust and the inner core are solid, whereas the outer core and inner mantle are liquid. The outer mantle is semi solid.

8 .

In terms of size, Neptune ranks no. ___ in our Solar System

A)

1

B)

2

C)

4

D)

7

Correct Answer : 4

9 .

Sea Breeze is formed during

A)

Seasonal

B)

Night Time

C)

Seasonal and Night Time

D)

Day Time

Correct Answer : Day Time

Sea breezes occur during hot, summer days because of the unequal heating rates of land and water. During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean.

10 .

Saliva helps in the digestion of

A)

Proteins

B)

Starch

C)

Vitamins

D)

Fats

Correct Answer : Starch

Saliva contains special enzymes that help digest the starches in your food. An enzyme called amylase breaks down starches (complex carbohydrates) into sugars, which your body can more easily absorb. Saliva also contains an enzyme called lingual lipase, which breaks down fats.