SSC CGL Previous Year Questions: General Science - 7 - SSC CGL MCQ

'Denirification' is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. These compounds are gaseous compounds and are not readily available for microbial growth; therefore they are typically released to the atmosphere.

Holstein Friesians are a breed of cattle known today as the world's highest-production dairy animals. They are found in Europe and America.

Coagulation removes dirt and other particles suspended in water. Alum and other chemicals are added to water to form tiny sticky particles called "floc" which attract the dirt particles. The combined weight of the dirt and the alum (floc) become heavy enough to sink to the bottom during sedimentation.

Retroviral integrase (IN) is an enzyme produced by a retrovirus (such as HIV) that enables its genetic material to be integrated into the DNA of the infected cell.

The relationship between two specific heat of gases i.e. on constant pressure and on constant volume is given by, C_p - C_v= R (or RJ).

Soldering of two metals in presence of heat is possible due to the forces of adhesion and cohesion which resulted into a stronger joining between two metals.

Stalactites and Stalagmites are formed due to the precipitation of Calcium carbonate (CaCO₃).

Hermaphroditism is a form of sexual reproduction in which an organism can self-fertilize or mate with another individual of the same species

Lyman series of hydrogen atom spectral lines in the Ultraviolet.

An electric battery is a device consisting of two or more electrochemical cells that convert stored chemical energy into electrical energy.

The speed of light remain unchanged after reflection

The area reserved for the welfare of wildlife is called National Park

When Ammonia gas is dissolved in water, ammonia acquires hydrogen ions from water to produce hydroxide and ammonium ions. Due to presence of hydroxide ions it is basic in nature

Mongoloid is a term used for all or some people indigenous to East Asia, Central Asia, Southeast Asia, North Asia, South Asia, the Arctic, the Americas, the Pacific Islands, and other lesser occurrences in other regions. Individuals within these populations often share certain associated phenotypic traits, such as epicanthic folds (skin folds covering the corners of the eyes), sinodonty and neoteny (retaining more juvenile physiological traits).

Turner Syndrome, represented by 45, X. This occurs in females in which one of the X-chromosomes is missing.

Myopia also known as short sightedness is a condition of the eye where one looking at a distant object seems a little out of focus.

In the process of photosynthesis, phytoplankton release oxygen into the water. Half of the world’s oxygen is produced from phytoplankton photosynthesis. The other half is produced via photosynthesis on land by trees, shrubs, grasses and other plants

Since a first-order reaction proceeds at a rate that depends linearly on concentration of only one reactant, the rate of reaction can be confirmed by increasing the concentration of a reactant

Mass is used to represent the amount of matter in an object.

Rate of transpiration increases in hot, dry and windy condition. Dry, windy weather provides a favorable condition for evaporation to take place on the surface of leaves.

Collateral Bundle is a type of vascular bundle in which the phloem and xylem lie on the same radius, with the phloem located towards the periphery of the stem and xylem towards the centre.

The Planck constant has dimensions of physical action, these are the same as those of angular momentum. In SI units, the Planck constant is expressed in joule seconds (J.S)

All living organisms are made up of biomolecules which has carbon as an important constituent

Polarization is a property of waves that can oscillate with more than one orientation. Electromagnetic waves such as light exhibit polarization, as do some other types of wave, such as gravitational waves.

In the state of Tamil Nadu the problem of salinity exists not only in coastal areas but also in inlands. In addition various natural factors also affect salinity. Nagapattinam is one of the districts unfit for cultivation due to this reason.

Natural System of Classification of Plants was proposed by British Botanists George Bentham and Joseph Dalton Hooker. In this system of classification all natural characters of plants both vegetative and reproductive are taken into consideration as the basic of classification.

Minamata disease is a neurological syndrome caused by severe mercury poisoning.

Gold is often referred as king of metals.

Amino acids are the building blocks of proteins and hence are the basic requirement for synthesis of proteins.

Fermi is the unit of length used to measure nuclear distances. The unit is named after the Italian physicist Enrico Fermi.