Question

Willemite is

Solution

Correct option is

Zn2SiO4

Willernite, a rare zinc silicate mineral, is Zn2SiO4. It has trigonal symmetry and is strongly fluorescent green.

SIMILAR QUESTIONS

Q1

‘Lapis-Lazuli’ is a blue coloured precious stone. It is mineral of the class

Q2

Gallium arsenide is purified by

Q3

Which of the following is correct?

Q4

Metals found in free as well as combined states are

Q5

By which of the following processes, the ore is made porous?

Q6

Stainless steel has iron and

Q7

Thermite process is used in reduction of

Q8

Bauxite ore is made up of Al2O3 + SiO2 + TiO2 + Fe2O3. This ore is treated with conc. NaOH solution at 500 K and 35 bar pressure for few hours and filtered when hot. In the filtrate, the species present are

Q9

 

When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed. FeO is present as impurities. This can be removed as slag during reduction of CuO. The flux added to form slag is

Q10

The temperature of the slag zone in the metallurgy of iron using blast furnace is