CTET Practice Test: Science-2 - CTET & State TET MCQ

​Arsenic has highest electronegativity in the given elements. 

Tramadol is used to treat moderate to moderately severe pain. 

​Neoprene is a family of synthetic rubbers that are produced by polymerization of chloroprene. Neoprene exhibits good chemical stability and maintains flexibility over a wide temperature range. 

Among the following elements Krypton has the lowest melting point.

HF compounds has the strongest hydrogen bond. 

​The chief ozone-depleting substances include chlorofluorocarbons (CFCs), carbon tetrachloride, hydrochlorofluorocarbons (HCFCs) and methyl chloroform. 

​Georges Claude invented Neon Lamp. 

​End products of digestion of carbohydrates are Glucose, fructose and galactose. 

​Among the following elements, the lowest melting point is of Argon i.e. -189.4 °C.

​Pedalfer is composed of high amount of aluminum and iron oxides. It is a subdivision of the zonal soil order comprising a large group of soils in which sesquioxides increase relative to silica during soil formation. Pedalfers usually occur in humid areas. 

​Noble Gases are all odorless, colorless, monatomic gases with very low chemical reactivity.The six noble gases that occur naturally are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn). 

Ozone(O3)is a very reactive allotrope of oxygen that is destructive to materials like rubber and fabrics and is also damaging to lung tissue if present in lower atmosphere. But in upper atmosphere Ozone absorbs ultraviolet and functions as a shield for the biosphere against damaging effects of solar UV radiation. 

​A type of colloid, of the form of one solid dispersed in another continuous solid is called Solid sol. Coloured Gems is an example of solid sol. 

​The process of loosing electrons is known as Oxidation. 

​Anions are atoms or radicals (groups of atoms), that have gained electrons. Since they now have more electrons than protons, anions have a negative charge. For example,Chloride ions Cl- , Bromide Br- , Iodide I-. 

​The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements. 

​Nickel allergy is a common cause of allergic contact dermatitis — an itchy rash that appears where your skin touches a usually harmless substance. 

Most liquids that conduct electricity are solutions of acids, bases and salts. 

​Activated Charcoal is used to remove colouring matter from pure substances by adsorption. 

​Chernobyl disaster is the result of pollution by radioactive wastes. Which occurred on 26 April 1986 in Ukranian Soviet Socialist Republic which was part of Soviet Union.