Advertisements
Advertisements
प्रश्न
The metal which can be extracted simply by heating the cinnabar ore in air is:
(a) Zn
(b) Cu
(c) Al
(d) Hg
उत्तर
(d) Hg
Mercury is a low reactive metal. Thus, it can be extracted from its ore cinnabar, HgS, by heating it in air.
APPEARS IN
संबंधित प्रश्न
What iron compound is present in haematite ore? Also write its chemical formula.
The two metals which are extracted by means of electrolytic reduction of their molten salts are:
(a) magnesium and manganese
(b) iron and aluminium
(c) zinc and magnesium
(d) magnesium and aluminium
Which of the following pair of metals exists in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
Give reasons, why aluminum is used in:
In aluminiothermy
Name the following:
Name two metals always find in combined state.
How an ore is concentrated by froth floatation process?
Atomic number of aluminium is _______ and its electronic configuration is _______.
Write the name.
The process of extraction of aluminium from alumina-
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
