Rutile is an ore of:
1. Ti
2. Zr
3. Mn
4. V
Which is not a mineral?
1. Mica
2. Peat
3. Quartz
4. Felspar
Which element is purified by Zone refining?
1. Ge
2. Ge and Si
3. Si
4. None
Alloy is an example of:
1. gel
2. aerosol
3. solid sol
4. emulsion
The second most common element on the earth is:
1. silicon
2. hydrogen
3. nitrogen
4. oxygen
Nickel is purified by thermal decomposition of its:
1. Hydride
2. Chloride
3. Azide
4. Carbonyl
In Serpek's process , by product obtained in the purification of bauxite is:
1. Al2O3
2. N2
3. NH3
4. none
CO is used in the metallurgy of:
1. Cu
2. Ni
3. Cr
4. Pt
In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used for:
1. O2 and CO respectively
2. O2 and Zn dust respectively
3. HNO3 and Zn dust respectiely
4. HNO3 and CO respectively
Name the metal M which is extracted on the basis of following reactions,
4M+8CN-+2H2O+O24[M(CN)2]-+4OH-
2[M(CN)2]-+Zn[Zn(CN)4]2-+2M
1. nickel
2. silver
3. copper
4. mercury