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

1 .

Dolomite power is applied in some agricultural lands. The purpose of applying it is to

A)

increase the pH of the soil

B)

lower the pH of the soil

C)

increase the phosphorus content of the soil

D)

increase the nitrogen content of the soil

Correct Answer : increase the pH of the soil

Dolomite is a limestone compound that contains calcium and magnesium. It provides valuable nutrients to plants and helpschange the pH of the soil by raising it to match the plants' needs. It evenprovides more nutrients than straight lime. It is often used in addition to balanced fertilizers, particularly with seeding fruit.

2 .

Cinnamon is obtained from which part of the plant?

A)

Fruits

B)

Bark

C)

Roots

D)

Stem

Correct Answer : Bark

Cinnamon, (Cinnamomum verum), also called Ceylon cinnamon, bushy evergreen tree of the laurel family (Lauraceae) and the spice derived from its bark.

3 .

In a food chain, what is the difference between primary consumers and secondary consumers?

A)

Primary consumers eat only plants, secondary consumers eat primary consumers

B)

Primary consumers eat plants and other consumers, secondary consumers eat plants and decomposed matter

C)

Primary consumers eat other consumers, secondary consumers eat only plants

D)

Primary consumers eat plants and decomposed matter, secondary consumers eat plants and other consumers

Correct Answer : Primary consumers eat only plants, secondary consumers eat primary consumers

4 .

The number of neutrons in an atom is equal to the :

A)

atomic number

B)

Mass number

C)

Mass number - atomic number

D)

Number of electrons

Correct Answer : Mass number - atomic number

5 .

Which of the following is an ore of iron?

A)

Epsom Salt

B)

Dolomite

C)

Galena

D)

Siderite

Correct Answer : Siderite

6 .

Among the given nutrients, milk is a poor source of which of the following?

A)

Protein

B)

Carbohydrate

C)

Vitamin 'C'

D)

Calcium

Correct Answer : Vitamin 'C'

7 .

In stems, the protoxylem lies towards the centre and the metaxylem lies towards the periphery of the organ. This type of primary xylem is called

A)

Xylem fibres

B)

Endarch

C)

Exarch

D)

Xylem parenchyma

Correct Answer : Endarch

8 .

Emblica officinalis is the scientific name of

A)

Amla

B)

Peepal

C)

Drumstick

D)

Mango

Correct Answer : Amla

Indian gooseberry or amla, scientifically known as Emblica officinalis Gaertn or Phyllanthus emblica Linn, is arguably the most important medicinal plant in the Indian traditional system of medicine, the Ayurveda, and in various traditional folk systems of medicine in the Southeast Asia.

9 .

_____is the wearing away of the landscape by different agents like water, wind and ice.

A)

Erosion

B)

Abrasion

C)

Attrition

D)

Weathering

Correct Answer : Erosion

Erosion is the wearing away of the landscape by different agents like water, wind and ice. The eroded material is carried away or transported by water, wind, etc. and eventually deposited. This process of erosion and deposition create different landforms on the surface of the earth.

10 .

Name the metal that can be easily cut with a knife

A)

Gold

B)

Copper

C)

Aluminium

D)

Sodium

Correct Answer : Sodium

Sodium is an alkali metal and is so soft that it can be easily cut by knife.