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

1 .

Cotton dust from textile mills causes a disease known as

A)

Silicosis

B)

Byssinosis

C)

Cancer

D)

Fluorosis

Correct Answer : Byssinosis

2 .

The pathogen of pneumonia is

A)

Fungi

B)

Virus

C)

Protozoa

D)

Bacteria

Correct Answer : Bacteria

3 .

Fluoride pollution mainly affects

A)

Bones

B)

Teeth

C)

Lungs

D)

Kidneys

Correct Answer : Teeth

4 .

Which kind of light waves are used in the remote control of Television

A)

Infrared

B)

X-ray

C)

Visible light

D)

None of the above

Correct Answer : Infrared

The main technology used in home remote controls is infrared (IR) light. The signal between a remote control handset and the device it controls consists of pulses of infrared light, which is invisible to the human eye but can be seen through a digital camera, video camera or a phone camera.

5 .

The "Big-Bang theory" explain the origin of

A)

Ocean

B)

Mammals

C)

Universe

D)

Continents

Correct Answer : Universe

The best-supported theory of our universe's origin centers on an event known as the big bang. This theory was born of the observation that other galaxies are moving away from our own at great speed in all directions, as if they had all been propelled by an ancient explosive force.

6 .

Total number of ear bones are

A)

2

B)

3

C)

4

D)

6

Correct Answer : 3

We humans have a total of 206 sizable bones in our bodies. There are also 6 additional bones, 3 in each ear, known as the ossicles (little bones). So the grand total is 212.

7 .

The energy content of food is generally measured in

A)

Kilojoules

B)

Coulombs

C)

Ergs

D)

Calories

Correct Answer : Calories

Energy is measured in units of kilocalories (kcal) or kilojoules (kJ). One kilocalorie (1 kcal) is equal to 4.18 kilojoules (4.18 kJ). The amount of energy a food contains per gram is known as its energy density so we can describe fat as more energy dense than protein or carbohydrate.

8 .

What is the chemical name of quick lime

A)

Calcium hydroxide

B)

Calcium bicarbonate

C)

Calcium oxide

D)

Calcium carbonate

Correct Answer : Calcium oxide

9 .

Which one of the following is not a Green House gas

A)

Ar

B)

COâ‚‚

C)

Nâ‚‚O

D)

CHâ‚„

Correct Answer : Ar

The various greenhouse gases are carbon dioxide, methane, chlorofluorocarbon, ozone, nitrous oxide, and water vapor.

10 .

Chemically, dry ice is

A)

solid sulphur dioxide

B)

solid carbon dioxide

C)

ice formed from pure distilled water

D)

ice kept at sub-zero temperatures

Correct Answer : solid carbon dioxide

Dry ice, carbon dioxide in its solid form, a dense, snowlike substance that sublimes (passes directly into the vapour without melting) at −78.5 °C (−109.3 °F), used as a refrigerant, especially during shipping of perishable products such as meats or ice cream.