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

1 .

A device which would not work on the moon is

A)

Spring balance

B)

Spectrometer

C)

Thermometer

D)

Siphon

Correct Answer : Siphon

2 .

Why does the outside of a glass filled with cold water become wet

A)

Due to diffusion of water through glass

B)

Due to propagation of water on the surface of walls of glass

C)

Due to condensation of water vapour in the atmosphere

D)

None of the above

Correct Answer : Due to condensation of water vapour in the atmosphere

3 .

Scorpion venom contains toxins which are

A)

Proteins

B)

Cyanides

C)

Alkalis

D)

Vitamins

Correct Answer : Proteins

Scorpion venom contains a very small protein chain called chlorotoxin, only 36 amino acids long. This tiny protein has a very powerful effect though. It is perfectly shaped to block chloride channels and stop chloride ions from entering muscle cells.

4 .

The colour of a blue litmus paper will turns _________ when you put a drop of acid on it

A)

pink

B)

yellow

C)

green

D)

red

Correct Answer : red

When we put a drop of acid on blue litmus paper then it turns red. Whereas, we put a drop of acid on red litmus paper then it remains red. - Under basic or alkaline conditions red litmus paper turns blue, with colour change occurring over the pH range of 4.5-8.3.

5 .

The product used for manufacturing of Industrial alcohol is

A)

Bagasse

B)

Molasses

C)

Paper-pulp

D)

Khandasari

Correct Answer : Molasses

6 .

Hydrogen was discovered by

A)

Henry Cavendish

B)

Antoine Lavoisier

C)

Christiaan Huygens

D)

Fred Sanger

Correct Answer : Henry Cavendish

Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass.

7 .

The Dynamo converts

A)

Electrical energy into Mechanical Energy

B)

Mechanical energy into Magnetic Energy

C)

Mechanical energy into Electrical Energy

D)

None of the above

Correct Answer : Mechanical energy into Electrical Energy

A dynamo converts mechanical energy into electrical energy. It used rotating coils of wire and magnetic fields to convert mechanical rotations into a pulsing direct electric current.

8 .

In fresh water, the salinity level is

A)

less the 0.03%

B)

less the 0.05%

C)

between 0.05 to 3%

D)

between 3 to 5%

Correct Answer : less the 0.05%

Fresh water has a salinity of 0.5 ppt or less. Estuaries can have varying salinity levels throughout their length and can range from 0.5-30 ppt depending on their proximity to river inflows or the ocean. The average salinity of ocean water is 35 ppt.

9 .

Who is known as father of GIS

A)

John Snow

B)

Ian McHarg

C)

Jack Dangermond

D)

Roger Tomlinson

Correct Answer : Roger Tomlinson

Roger F. Tomlinson who first coined the term geographic information system (GIS). He created the first computerized geographic information system in the 1960s while working for the Canadian government—a geographic database still used today by municipalities across Canada for land planning.

10 .

Mycobacterium Indicus Pranii is a vaccine recently developed against

A)

Brain Fever

B)

Tuberculosis

C)

Leprosy

D)

Measles

Correct Answer : Leprosy

Since its development as an anti-leprosy vaccine during 1990s, Mycobacterium indicus pranii (MIP) has been evaluated successfully as prophylactic as well as therapeutic vaccine against TB in animal models and in clinical set-ups.