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

1 .

Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil is called?

A)

Deforestation

B)

Pollution

C)

Solid wastes

D)

Greenhouse effect

Correct Answer : Pollution

2 .

Which one of the following bio reserves of India is not included in the World Network of Biosphere Reserve?

A)

Gulf of Mannar

B)

Sunderbans

C)

Nandadevi

D)

Corbett

Correct Answer : Corbett

3 .

Super cooling stands for cooling of a liquid :

A)

at melting point

B)

at freezing point

C)

below freezing point

D)

above melting point

Correct Answer : below freezing point

4 .

There is a protocol signed to reduce production of CFC, known as

A)

CFC Protocol

B)

Montreal Protocol

C)

IR Protocol

D)

UV Protocol

Correct Answer : Montreal Protocol

5 .

The most abundant metal in the Earth's crust is

A)

aluminium

B)

copper

C)

iron

D)

zinc

Correct Answer : aluminium

hus, the most abundant metal on earth's crust is Aluminium.

6 .

_____is the number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration

A)

Mortality

B)

Natality

C)

Immigration

D)

Emigration

Correct Answer : Immigration

7 .

The arrangement of leaves on an axis or stem is called

A)

vernation

B)

phytotaxy

C)

venation

D)

Phyllotaxy

Correct Answer : Phyllotaxy

8 .

The roots of a plant always grow downwards while shoots usually grows upwards and away from the earth. It is known as

A)

Geotropism

B)

Hydrotropism

C)

Chemotropism

D)

All of the above

Correct Answer : Geotropism

9 .

Iodised salt contains

A)

Magnesium iodide

B)

Potassium iodide

C)

Calcium iodide

D)

Free iodine

Correct Answer : Potassium iodide

It consists of 40% sodium and 60% chloride, by weight. Salt is by far the biggest dietary source of sodium, and the words “salt” and “sodium” are often used interchangeably. Some varieties of salt may contain trace amounts of calcium, potassium, iron and zinc. Iodine is often added to table salt ( 2 , 3 ).

10 .

Brass gets discoloured in air due to the presence of

A)

Oxygen

B)

Nitrogen

C)

Hydrogen Sulphide

D)

Carbon dioxide

Correct Answer : Hydrogen Sulphide