SSC CGL Previous Year Questions: General Science - 16 - SSC CGL MCQ

The principal components of pyroligneous acid are acetic acid, acetone and methanol. It was once used as a commercial source for acetic acid.

UCIL produce batteries, carbon products, welding equipment, plastics, industrial chemicals, pesticides, and marine products

Most drying oils owe their drying properties to the presence of a large percentage of linolenic acid (which derives its name from "linseed"), which is highly unsaturated.

Carotenoids are tetraterpenoid organic pigments that are naturally occurring in the chloroplasts and chromoplasts of plants and some other photosynthetic organism like algae, some bacteria, and some types of fungus.

Close to the surface of the Sun, the light it emits is not in parallel beams at all. It sends photons out in pretty much every direction at random. But the Sun is far away from Earth. Most of those photons don't reach the Earth because they're heading in the wrong direction. Only those photons that happen to be heading toward the Earth actually get there - and the photons that are heading to the Earth are all heading in more or less the same direction. So the photons that actually reach the Earth are all travelling in more or less parallel directions.

Polar bears, which pile on fat to survive hibernation and yet do not become diabetic, hold clues for treating Type II diabetes, a disease associated with obesity that afflicts more than 190 million people worlwide, reaching epidemic proportions in many countries.

All electromagnetic waves regardless of their wavelengths, including all colors of light, have the identical speed in a vacuum.

In hydroelectric power plants the potential energy of water is utilized to produce electricity. The height of water in the reservoir decides how much potential energy water possesses

In people with emphysema, the lung tissue involved in exchange of gases (oxygen and carbon dioxide) is impaired or destroyed. Emphysema is included in a group of diseases called chronic obstructive pulmonary disease (COPD).

Potassium Nitrate occurs as a mineral niter and is a natural solid source of nitrogen. Potassium nitrate is one of several nitrogen-containing compounds collectively referred to as saltpeter.

Eutrophication is the gradual increase in the concentration of phosphorus, nitrogen, and other nutrients in an aquatic ecosystem such as a lake. Due to nutrient salts excessive structural changes takes place in the ecosystem such as increased production of algae and aquatic plants, depletion of fish species, general deterioration of oxygen and water quality etc.

Out of the given alternatives the best way to maintain a natural equilibrium between the pest and the predator is by using biological control.

Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue.

Ferromagnetic substances are those which gets strongly magnetised when placed in an external magnetic field. Iron, cobalt etc. are examples of ferromagnetic substances.

The pinhole camera works on the concept of the rectilinear propagation of light. Each point on the surface of an illuminated object reflects rays of light in all directions. The small hole in the camera lets through a certain number of these rays which continue on their course until they meet the projection plane where they produce a reverse image of the object.

With the rise of temperature, the velocity of gas molecules increases, increasing the kinetic energy.

sex of a child is determined at the time of conception. When the child is conceived, sperm carrying X or Y chromosome fertilizes with egg which carries only X. Depending upon the X or Y from sperm it resulted into female or male progeny.

Producers, consumers and decomposers are the major components of a food chain. Although all the components are important, the decomposers use the energy available in dead organisms; break them down into useful nutrients; recycle and maintain the nutrients back to the soil.

Chimpanzee is most closest to the modern man.

A gram of fertile agricultural soil generally contains between 100 million and 1 billion bacteria. 

During a reduction reaction, addition of one or more electrons/addition of hydrogen or removal of oxygen takes place

Tetraethyllead is an organolead compound used as a petro-fuel additive that allowed engine compression to be raised substantially. This in turn increased vehicle performance.

Rickets is caused by deficiency of Vitamin-D. Deficiency of Vitamin-E causes hemolysis, sterility among various disorders.

Wool under certain conditions releases ammonia following destructive distillation.

During respiration CO₂ and water is released along with generation of energy rich molecules-ATP.  

Global network of daily temperature record created around 1920.

Sex hormones like estrogen, progesterone, testosterone etc. are mainly steroidal in nature.

Two pollutants emitted by motor vehicles react to form ground-level ozone or smog which can cause respiratory problems and reduce visibility

Green glands in some crustaceans have an excretory function and open at the bases of the larger antennae.

The exchange of gases during respiration takes place through diffusion. At the respiratory membrane, where the alveolar and capillary walls meet, gases move across the membranes, when O₂ enters the bloodstream and CO₂ exits.