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

1 .

Mangifera indica is the scientific name of

A)

Guava

B)

Mango

C)

Jack fruit

D)

Amla

Correct Answer : Option (B) - Mango

Mangifera indica (MI), also known as mango, aam, it has been an important herb in the Ayurvedic and indigenous medical systems for over 4000 years.

2 .

A ________________ is known by different names in different parts of the world. It is called a â€˜hurricaneâ€™ in North America.

A)

whirlpool

B)

twister

C)

cyclone

D)

funnel

Correct Answer : Option (C) - cyclone

A cyclone can be defined as a low atmospheric pressure area around which a large scale air mass rotates. The cyclone has different names in different parts of the world.

3 .

Which of the following is the uppermost layer of the atmosphere?

A)

Exosphere

B)

Ionosphere

C)

Mesosphere

D)

Stratosphere

Correct Answer : Option (A) - Exosphere

Exosphere. Although some experts consider the thermosphere to be the uppermost layer of our atmosphere, others consider the exosphere to be the actual "final frontier" of Earth's gaseous envelope.

4 .

When warm air rises up and cold air from the surrounding areas rushes in to fill its place then this sets up ________________ in air.

A)

conduction

B)

convection

C)

agitation

D)

radiation

Correct Answer : Option (B) - convection

When warm air rises up and cold air from the surrounding areas rushes in to fill its place then this sets up convection in air.

* When warm air rises, the air pressure at that place gets lowered. The cold air from the surrounding areas rushes in to fill its place. This sets up convection currents in the air.

* Wind currents are generated due to uneven heating on the earth.

* Convection is the process by which the transmission of heat takes place through a substance from one point to another due to actual bodily movement of heated particles of the substance.

5 .

The study of Cells is also known as

A)

Cellology

B)

Nucleology

C)

Physiology

D)

Cytology

Correct Answer : Option (D) - Cytology

6 .

Silk worms feed on

A)

Mulberry leaves

B)

Basil leaves

C)

Curry leaves

D)

Rose leaves

Correct Answer : Option (A) - Mulberry leaves

Domesticated silkworms are the foundation of sericulture. Silkworms predominately feeds on mulberry leaves.

7 .

'Ooceraea joshii', is an Ant species recently discovered in which state?

A)

Telangana

B)

Andhra Pradesh

C)

Kerala

D)

Karnataka

Correct Answer : Option (C) - Kerala

New Ant Species "Ooceraea Joshii" Discovered in Kerala, Named After JNCASR Biologist. Two new species of a rare ant genus have been discovered in India. The species of the ant genus Ooceraea found in Kerala, and Tamil Nadu add to the diversity of this rare genus.

8 .

What was the shape of the galaxy named A1689 B11 that existed 11 billion years ago?

A)

Turbulent disc

B)

Light Disk

C)

Thin disc

D)

Spiral

Correct Answer : Option (D) - Spiral

9 .

Biogas is a mixture of

A)

Methane and carbon monoxide

B)

Methane and carbon dioxide

C)

Methane and nitrous oxide

D)

Methane and nitrogen

Correct Answer : Option (B) - Methane and carbon dioxide

Biogas is principally a mixture of methane (CHâ‚„) and carbon dioxide (COâ‚‚) along with other trace gases. Biogas can be collected from landfills, covered lagoons, or enclosed tanks called anaerobic digesters.

10 .

Deuterium oxide is also known as

A)

Distilled water

B)

Soda water

C)

Heavy Water

D)

None of the above

Correct Answer : Option (C) - Heavy Water

Heavy water (Dâ‚‚O), also called deuterium oxide, water composed of deuterium, the hydrogen isotope with a mass double that of ordinary hydrogen, and oxygen.