Science and Technology - General Knowledge Questions

1 .

Which of the following is a chemical property?

Reactivity

Density

Solubility

All of the above

Correct Answer : Reactivity

The change of one type of matter into another type (or the inability to change) is a chemical property. Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion.

2 .

Researchers at the University of Illinois have announced discovery of new form of matter called

Unobtanium

Spectronium

Transitonium

Excitonium

Correct Answer : Excitonium

Researchers at the University of Illinois have announced an exciting finding — the discovery of a new form of matter: excitonium. This material is made up of a kind of boson, a composite particle that could allow the matter to act as a superfluid, superconductor, or even as an insulating electronic crystal.

3 .

The central principle of physiology is

stimulation

temperature regulation

homeostasis

reflexes

Correct Answer : homeostasis

4 .

A universal recipient blood group belongs to

Correct Answer : AB

It is called the "universal donor" type because it is compatible with any blood type. Type AB blood is called the "universal recipient" type because a person who has it can receive blood of any type. Although "universal donor" and "universal recipient" types may be used to classify blood in an emergency, blood type tests are always done to prevent transfusion reactions.

Minor antigens (other than A, B, and Rh) that occur on red blood cells can sometimes also cause problems. So they are also checked for a match before giving a blood transfusion.

5 .

Vertebrates and tunicates share

the formation of structures from the neural crest.

a notochord and a dorsal, hollow nerve cord.

an endoskeleton that includes a skull.

jaws adapted for feeding.

Correct Answer : a notochord and a dorsal, hollow nerve cord.

The common characteristics between the tunicates and vertebrates are the presence of a notochord and a dorsal hollow nerve cord. Thus the correct answer is [e], a notochord and a dorsal hollow nerve cord.

6 .

Cartography is the science of

maps

cartoons

coins

None of the above

Correct Answer : maps

Cartography, the art and science of graphically representing a geographical area, usually on a flat surface such as a map or chart. It may involve the superimposition of political, cultural, or other nongeographical divisions onto the representation of a geographical area.

7 .

The plants which flower only once in their lifetime are called

Monogamous

Monogenic

Monocots

Monocarpic

Correct Answer : Monocarpic

Bamboo species are monocarpic i.e., flower generally only once in its life-time after 50−100 years.

8 .

Electron, Proton, Neutron discovered by

J. J. Thomson, Ernest Rutherford & James Chadwick

John Dalton, J.J. Thomson & Neils Bohr

Neils Bohr, John Dalton & J.J. Thomson

None of the above

Correct Answer : J. J. Thomson, Ernest Rutherford & James Chadwick

Electron : 02 Discovery of Electron, Proton and Neutron. Electrons were discovered by J.J. Thomson in 1897.

Proton : Observed as H⁺ by Eugen Goldstein (1886). Identified in other nuclei (and named) by Ernest Rutherford (1917–1920).

Neutron : In May 1932 James Chadwick announced that the core also contained a new uncharged particle, which he called the neutron.

9 .

The substance which makes natural rubber more strong and bouncy?

Chlorine

Sponge

Sulphur

Polythene

Correct Answer : Sulphur

Sulfur vulcanisation is a chemical process for converting natural rubber or related polymers into more durable materials by heating them with sulfur. By this they achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.

10 .

Pain controlling chemicals in the body are called

Androgens

Endorphins

Histamines

Neural regulators

Correct Answer : Endorphins

Pain controlling chemicals in the body are called endorphins. Endorphins are produced by the nervous system and pituitary gland.