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

1 .

Which of the following is the main component of bones and teeth

A)

Calcium phosphate

B)

Calcium carbonate

C)

Calcium sulphate

D)

Calcium nitrate

Correct Answer : Option (A) - Calcium phosphate

2 .

Which metal is present in insulin

A)

Tin

B)

Zinc

C)

Aluminium

D)

Copper

Correct Answer : Option (B) - Zinc

3 .

The correct pair is

A)

Vitamin B1-Retinol

B)

Vitamin B2-Riboflavin

C)

Vitamin B6-Niacin

D)

Vitamin C-Calcifero

Correct Answer : Option (B) - Vitamin B2-Riboflavin

4 .

What is the basic mineral used in making glass

A)

Soda ash

B)

Lime Stone

C)

Silica

D)

Sand

Correct Answer : Option (C) - Silica

Silica is the major ingredient in virtually all types of glass including containers, flat glass, lighting glass, tableware, TV tubes and screens, decorative glass, fibreglass, optical glass and vacuum flasks.

5 .

Which one is used as Petrol additive

A)

Urethane

B)

Isobutanol

C)

Strontium Nitrate

D)

Tetraethyl Lead

Correct Answer : Option (D) - Tetraethyl Lead

6 .

Radium is obtained from which mineral

A)

Haematite

B)

Pitchblende

C)

Limestone

D)

None of the above

Correct Answer : Option (B) - Pitchblende

Thus, radium is found in tiny quantities in the uranium ore uraninite and various other uranium minerals, and in even tinier quantities in thorium minerals. One ton of pitchblende typically yields about one seventh of a gram of radium

7 .

Which of the following non-metals is a liquid at room temperature

A)

Bromine

B)

Sulphur

C)

Carbon

D)

Iodine

Correct Answer : Option (A) - Bromine

8 .

Which of the following principles is associated with Optical Fibre

A)

Refraction

B)

Total Internal reflection

C)

Interference

D)

Scattering

Correct Answer : Option (B) - Total Internal reflection

9 .

The first synthetically prepared organic compound was

A)

Glucose

B)

Methane

C)

Urea

D)

Benzene

Correct Answer : Option (C) - Urea

Friedrich Wöhler was the first to synthesize an organic compound from an inorganic substance. In 1828, he synthesized urea by slowly evaporating a water solution of ammonium cyanate, which he had prepared by adding silver cyanate to ammonium chloride.

10 .

Kg mÂ² per sec is the unit of

A)

Power

B)

Energy

C)

Momentum

D)

Angular Momentum

Correct Answer : Option (D) - Angular Momentum