General Science Quiz Set2

A mirage is a naturally occurring optical phenomenon in which light rays bend via refraction to produce a displaced image of distant objects or the sky.

The phenomenon responsible for the blue colour of sky is the tyndall effect or the dispersion of light in which the blue light scattered more so it is visible to us .

Vulcanization involves heating the rubber with sulfur under pressure.

Radon due to its radioactive nature is used in treatment of cancer (Radiotherapy).

People drinking alcohol die due to liver cirrhosis and may also cause lung cancer , throat cancer etc.

At the base of the food chain lie the primary producers. The primary producers are autotrophs and are most often photosynthetic organisms such as plants, algae, or cyanobacteria.

The chemical properties of an element are determined by the configuration of its electrons in orbit around its nucleus. The number of electrons in orbit is equal to the number of protons in the nucleus.

The lumen (symbol: lm) is the SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time.
Unit system: SI derived unit
Unit of: Luminous flux
Symbol: lm
SI base units: 1 cd⋅sr

Dissipative forces are forces of such nature that energy is lost from a system when motion takes place.

Sweeter fruits tend to have fructose more than other compounds in them. Despite having acidic juice in them, the high fructose levels balance out the acids making them sweet in taste.

Diatom ooze (formed from microscopic unicellular algae having cell walls consisting of or resembling silica) is the most widespread deposit in the high southern latitudes but, unlike in the Pacific, is missing in northern latitudes.

Carotenoids are responsible for the red, orange and yellow color of leaves. Carotenoids are present with chlorophyll, but in summer the leaves are green because of high levels of chlorophyll.

DNA may hold secret to boosting metabolism and preventing heart disease. Polar bears may hold the answer to the obesity crisis in their genes, new research has shown. A study of the animal’s DNA revealed they are uniquely evolved to cope with a high fat diet that would prove disastrous to a human.

Eutrophication most commonly arises from the oversupply of nutrients, most commonly as nitrogen or phosphorus, which leads to overgrowth of plants and algae in aquatic ecosystems. After such organisms die, bacterial degradation of their biomass results in oxygen consumption, thereby creating the state of hypoxia.

Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include the elements iron, nickel and cobalt and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone.

Pascal’s law (also Pascal’s principle or the principle of transmission of fluid-pressure) is a principle in fluid mechanics given by Blaise Pascal that states that a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere.
The hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing ethylene glycol, to transfer pressure from the controlling unit, which is usually near the operator of the vehicle, to the actual brake mechanism, which is usually at or near the wheel of the vehicle.

When primary amide is treated with Br2 and NaOH solution ,the amide is converted to primary amine having one C-atom less than the amide taken. This is known as Hoffmann bromamide reaction or Hoffmann rearrangement or Hoffmann degradation reaction.

Denatured alcohol, also called methylated spirits or denatured rectified spirit, is ethanol that has additives to make it poisonous, bad-tasting, foul-smelling.

Polymeric adsorbents are spherical synthetic polymers with defined pore structure and high surface area for efficient and selective removal of organic molecules, primarily in aqueous applications.

Producers are eaten by primary consumers. Examples of primary consumers include may fly larvae, crayfish, and small minnows. These primary consumers are then preyed upon by secondary consumers. Secondary consumers are often carnivorous: examples of secondary consumers include dragonflies and other larger fish