Question

The halide ore of sodium is called as_________.
A. Horn salt
B. Cryolite
C. Rock salt
D. Both a and c

Answer 1

Hint:Halide ores are metallic halides which are very rarely found in nature. Most commonly ,chlorides are used. For example, Common salt $N{a^ + }C{l^ - }$; Horn silver$AgCl$, Carnallite. The important fluoride ores are Fluorspar, Cryolite $N{a_3}Al{F_6}$

Complete answer:
The halide ore of sodium is known as Rock salt. It is also named as sodium chloride. It is a compound containing ions such as $N{a^ + }$and $C{l^ - }$ having chemical formula $N{a^ + }C{l^ - }$ ,having 1:1 ratio of sodium and chloride ions.
Rock salt has various applications. It reduces the risk of low sodium levels, improves muscle cramps, treats sore throats, also cures skin health.
Cryolite is a colourless to white halide mineral known as sodium aluminium fluoride ($N{a_3}Al{F_6}$). It happens in an enormous store at Greenland, and in limited quantities in Spain and various other countries. It was generally utilized as a metal of aluminium and later in the electrolytic handling of the aluminium-rich oxide metal bauxite (itself a blend of aluminium oxide minerals, for example, gibbsite, boehmite and diaspore). The trouble of isolating aluminium from oxygen in the oxide metals was overwhelmed by the utilization of cryolite as a motion to disintegrate the oxide mineral(s). Pure cryolite itself softens at 1012 °C (1285 K), and it can break up the aluminium oxides adequately well to permit simple extraction of the aluminium by electrolysis. Considerable energy is as yet required for both warming the materials and the electrolysis; however, it is significantly more energy-productive than softening the oxides themselves. As regular cryolite is too uncommon to possibly be utilized for this reason, manufactured sodium aluminium fluoride is delivered from the basic mineral fluorite.

Hence, the correct option is (D) .

Note:In order to answer these types of questions, students should know the ores of various metals used in chemistry. All the names of the ores should be learnt by heart so that if any such questions come in competitive exams, they can answer these questions with ease.