Extraction of Zinc

Q.

Write the formula for zinc blende.

Q. 29. Two types of subshells are partially filled in- Cu, Cr, Fe or Zn. 2.

Q. Starting from acetylene and any alkyl halide, which of the following yields cyclodecyne?

1. 1 eq. $NaN{H}_2$ and $Br(C{H}_2{)}_{9}Br$
2. 2 eq. $NaN{H}_2$ and $Br(C{H}_2{)}_{8}Br$
3. 1 eq. $NaN{H}_2$ and $Br(C{H}_2{)}_{8}Br$
4. Both b and c

Q. Extraction of zinc from zinc blende is achieved by :

1. Roasting followed by reduction with carbon
2. Roasting followed by self reduction
3. Roasting followed by reduction with another metal
4. Electrolytic reduction

Q.

The smelting of Zinc Oxide (obtained from roasted ZnS) happens __ the boiling point of Zinc metal

Q. why lithium reacts less vigorously with water?xplain in detail

Q.

While ZnS is roasted, the temperature is consistently maintained above
${860}^{0}C$ while the influx of air is controlled – True or False?

1. True

2. False

Q. ZnS is also present in Sphalerite

1. False
2. True

Q.

The ore zinc blende is an important source of the metal zinc. What is the name of the zinc compound in zinc blende?