inorganic chemistry - Category wise Question and Answer Practice Test with Solutions

Answer: (c)

Manganese is essential to iron and steel production. At present, steel making accounts for 85 to 90% of the total demand, most of the total demand. Manganese is a key component of low-cost stainless steel formulations and certain widely used aluminium alloys.

Limestone can be used in constructing buildings. It can be used for making cement and mortar. Limestone is used to make glass and even used to make roads.

Bauxite is the mineral ore of aluminium which is used in the manufacture of cans, aeroplanes, sporting and electronic equipment and home appliances.

The Wright Brother’s first aeroplane to fly in 1903 only was able to get off the ground because they modified its engine with aluminium in order to reduce its weight. Without the ability of the strong aluminium, alloys to withstand the huge pressures and stresses involved, high-altitude flying would not be conceivable. In fact, aluminium comprises about 80% of an aircraft’s unladen weight.

The element copper is used extensively as an electrical conductor, for the making of electrical wire.

Answer: (d)

Answer: (d)

Nickel silver, also known as German silver, is a copper alloy with nickel and often zinc.

Solders are typically made from tin or lead or a combination of both in the ratio of 63:37 respectively.

Calcium hypochlorite, also known as bleaching powder, is a chemical compound with the formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite (liquid bleach).

Hypo solution is the abbreviation for sodium thiosulphate or sodium hyposulphite, a chemical used to fix the image on photographic film after it has been developed.

Answer: (a)

Answer: (c)

Statement (1) and (2) are correct. Urea contains maximum percentage of N among various fertilizers used. The mixture of Ca(H₂PO₄) 2 and CaSO₄ is sold as “super phosphate”. Statement (3) is wrong. Muriate is name for potassium chloride KCl.