SSC CGL Previous Year Questions: General Science - 8 - SSC CGL MCQ

Blowing air through an open pipe will led to no changein pressure and hence the process will be isobaric.

Christmas factor or factor IX is one of the proteases of the coagulation system.

The efficiency of a reversible heat engine is always greater than the efficiency of an irreversible engine operating between same two thermal reservoirs.

Chemotherapy is the use of medicines or drugs to treat cancer.

Oxygen is the most abundant element, making up about  47% of the earth's mass.

Since the wavelength of electron is much smaller as compared to the wavelength of visible light; the magnification of electron microscope is higher than optical microscope.

The word ‘amphi’ means two,which is used for amphibians for their life activity on land and in water.

Nitrate is the main form of nitrogen compounds that are present inside water.

Edward Jenner is often called "the father of immunology".

Due to presence of phosphate group inside DNA it shows the property of hydrophilicity.

The cerebellum is a small part of the brain positioned at the back of the head, where it meets the spine, which acts as the body’s movement and balance control centre.

Potash Alum is used to reduce bleeding in minor cuts and abrasions, nose bleeds, and haemorrhoids.

The phenomenon of total internal reflection takes place only when light transfers from denser to rarer medium.

Interferon is produced by the body's cells as a defensive response to viruses.

The first law of thermodynamics is a version of the law of conservation of energy.

Red rot of sugarcane is a major disease which is caused by concealed fungal ascomycete Colletotrichum falcatum

A large numbers of identical plants known as clones are produced through the process of micropropagation.

Benzene hexachloride (BHC) also known as Gammaxene is an important pesticide.

Apple is a false fruit in which the edible part is not the ovary but the fleshy thalamus.

Succulent plants store water in their stems or leaves. They include the Cactaceae family, which has round stems and can store a lot of water. The leaves are often vestigial, as in the case of cacti, wherein the leaves are reduced to spines, or they do not have leaves at all. Water is stored in the bulbs of some plants, at or below ground level. They may be dormant during drought conditions and are, therefore, known as drought evaders.

Thorium is an element which are used in radioactive chemicals and is non-renewable where as all other three options are power generating systems which are regenerated.

Archegonium is the female reproductive organ in ferns and mosses. An archegonium also occurs in some gymnosperms, e.g. cycads and conifers. A flask-shaped structure, it consists of a neck, with one or more layers of cells, and a swollen base-the venter-which contains the egg.

Trochodendron is a genus of flowering plants with one living species, Trochodendron aralioides, and six extinct species known from the fossil record.

A Caesarean section (often C-section) is a surgical procedure in which one or more incisions are made through a mother's abdomen (laparotomy) and uterus (hysterotomy) to deliver one or more babies. The first modern Caesarean section was performed by German gynecologist Ferdinand Adolf Kehrer in 1881. But in ancient medical history Julius Caesar was the first person to be borne by this method and thus the operation named after him.

Study of ants is called Myrmecology

A Reverse transcriptase (RT) is an enzyme used to generate complementary DNA (cDNA) from an RNA template, a process termed reverse transcription. RT is needed for the replication of retroviruses (e.g., HIV), and RT inhibitors are widely used as antiretroviral drugs.

Fleming's right-hand rule (for generators) shows the direction of induced current when a conductor moves in a magnetic field. The right hand is held with the thumb, first finger and second finger mutually perpendicular to each other (at right angles).

The watt (symbol: W) is a derived unit of power in the International System of Units (SI), named after the Scottish engineer James Watt (1736-1819).

The NIOSH states "Under dry conditions, the resistance offered by the human body may be as high as 100,000 Ohms. Wet or broken skin may drop the body's resistance to 1,000 Ohms," adding that "highvoltage electrical energy quickly breaks down human skin, reducing the human body's resistance to 500 Ohms."

The critical temperature for superconductors is the temperature at which the electrical resistivity of a metal drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter.