Common Chemical Compounds and Reactions

It is commonly used as a test for sulfate ion. In industry, barium chloride is mainly used in the purification of brine solution in caustic chlorine plants and also in the manufacture of heat treatment salts, case hardening of steel, in the manufacture of pigments, and in the manufacture of other barium salts. BaCl₂ is also used in fireworks to give a bright green colour.

Calcium hydride is the chemical compound with the formula CaH₂. This grey powder (white if pure, which is rare) reacts vigorously with water liberating hydrogen gas. CaH₂ is thus used as a drying agent, i.e. a desiccant.

Calcium chlorate is the calcium salt of chloric acid with the chemical formula of Ca(ClO₃)₂. Like potassium chlorate, it is a strong oxidizer and can be used in pyrotechnic formulations. It is a crystalline substance. It may explode when heated strongly or in the presence of reducing agents, such as organic matter.

Carbon tetrachloride is the organic compound with the formula CCl₄. It was formerly widely used in fire extinguishers, as a precursor to refrigerants, and as a cleaning agent. It is a colourless liquid with a sweet smell that can be detected at low levels.

It is a covalent compound formed by the sharing of electrons between two hydrogen atoms.

Lithium bromide or LiBr, is a chemical compound of lithium and bromine. Its extreme hygroscopic character makes LiBr useful as a desiccant in certain air conditioning systems.

Magnesium oxide is a white solid mineral that occurs naturally as periclase and is a source of magnesium. It is hygroscopic in nature. MgO is one of the raw materials for making Portland cement in dry process plants.

Potassium nitrate occurs as a mineral niter and is a natural solid source of nitrogen. Major uses of potassium nitrate are in fertilizers, rocket propellants and fireworks. It is one of the constituents of gunpowder.

The chemical compound potassium chloride (KCl) is a metal halide salt composed of potassium and chlorine. In its pure state, it is odourless and has a white or colourless vitreous crystal appearance.The majority of potassium chloride produced is used for making fertilizer, since the growth of many plants is limited by their potassium intake.

This option is correct because slaked lime are stable at ordinary condition of use and storage, but readily absorbs carbon dioxide from air to form calcium carbonate. If it is heated to decomposition to form caustic fumes of CaO, calcium hydroxide is refined from limestone.

This option is correct because when the molten sulphur is poured into a beaker of water, it forms a rubbery mass which remains in polymer form for a variable length of the time, but it may get crystallised into a brittle form.

This option is correct because sodium hexametaphosphate is a polymeric salt of metaphosphoric acid. It is used for softening hard water under the trade name calgon.

It is a common sedimentary rock.

Plaster of Paris is obtained by heating gypsum or calcium sulphate to about 140-180 degree Celsius.

Chlorine trifluoride is an interhalogen compound. This colourless, poisonous, corrosive and very reactive gas condenses to a pale-greenish yellow liquid. The compound is primarily of interest as a component in rocket fuels, in industrial cleaning and etching operations in the semiconductor industry, in nuclear reactor fuel processing and other industrial operations.