A. A metal can be economically extracted from it
B. It contains ≥ 40% metal
C. The metal present in it is costly
D. All A , B. and C.
Correct Answer: A metal can be economically extracted from it ✔
Last Updated: February 14, 2019
Related MCQs
- Na2CO3 is called __________?
- Hydrogenation of oil takes place in a/an __________ reactor ?
- Salt is the basic raw material for the manufacture of__________?
- Glycerine is recovered from lye by __________?
- Which of the following is not an antibiotic ?
- Enzymes are organic catalysts used in the __________ reactions ?
- Rosin soap is added during paper manufacture to__________?
- Solvay process is used for the manufacture of__________?
- The purpose of tanning in leather industry is to__________?
- The amount of benzene present in pure Benzol is about __________ percent ?
- Glycerine is a by-product of the __________ industry ?
- Refractory bricks having high thermal conductivity is desirable, when it is to be used in the __________?
- Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on __________?
- Enamels__________?
- Permanent hardness of water can be removed by__________?
- Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called__________?
- CaCl(OCl) is the chemical formula of__________?
- Bio-degradable detergents __________?
- Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass?
- Polymethyl methacrylate (PMMA) is known as __________?
- Function of thinner in a paint is to __________ ?
- Metallic soap is __________ salt of fatty acids ?
- DDT stands for__________?
- Fish contains about __________ percent oil ?
- Solvent extracted oil__________?
- __________ is obtained as a by-product in the manufacture of sodium hydroxide using brine ?
- Phenol is mainly used__________?
- Phthalic anhydride is used__________?
- __________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant ?
- Which is the most suitable dye for synthetic fibres ?
- Nickel is not used as a catalyst in the__________?
- Hard water__________?
- Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of__________?
- Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C ?
- Frasch process is for__________?
- The drug used in contraceptives is__________?
- Neoprene is a__________?
- Gun powder, which is an explosive comprises of charcoal, sulphur and__________?
- High temperature carbonisation of coal takes place at __________ °C?
- Viscose rayon is chemically__________?
- Mercury cells for caustic soda manufacture, compared to diaphragm cells__________?
- Sucrose content in the raw juice extracted from sugar cane is about __________ percent?
- Builders are added in soap to act as__________?
- Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda ?
- Kaolin is a/an __________?
- Phosphoric acid is prepared from__________?
- Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?
- Phosphate rock is a raw material for the manufacture of__________?
- Which of the following is the second major component of cement ?
- Pick out the endothermic reaction out of the following ?
- The terminology ‘BTX’ used in coal tar distillation industry refers to__________?