Download GTU BE/B.Tech 2019 Winter 5th Sem New 2152107 Extraction Of Non Ferrous Metals Question Paper

FirstRanker.com

GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- V (New) EXAMINATION - WINTER 2019

--- Content provided by​ FirstRanker.com ---

Subject Code: 2152107 Date: 21/11/2019
Subject Name: Extraction of Non Ferrous Metals
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.

--- Content provided by FirstRanker.com ---

2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Enlist the aluminum, lead and copper industries in India. 03
(b) Describe SWOT analysis of Indian nonferrous metal industries. 04

--- Content provided by FirstRanker.com ---

(c) Discuss about the production and consumption of various non- 07
ferrous metals in India.

Q.2 (a) What are the important ores of aluminum? Give their chemical 03
formulae.
(b) Explain why does the ALCOA process consume less energy than 04

--- Content provided by FirstRanker.com ---

the Hall-Héroult process?
(c) Discuss Bayer process for alumina production and give the flow 07
sheet.

OR

(c) Explain various factors governing fused salt electrolysis of 07

--- Content provided by‌ FirstRanker.com ---

alumina.

Q.3 (a) What is blister copper? Name the elements present in it as 03
impurities.
(b) Explain the TOOTH process for Aluminum production. 04
(c) Discuss the chemistry of copper smelting. Explain any of the flash 07

--- Content provided by FirstRanker.com ---

smelting techniques with the help of a sketch. Give its advantages
and limitations of over other processes.

OR

Q.3 (a) Mention the relationship between slag losses and matte grades in 03
copper smelting operation.

--- Content provided by⁠ FirstRanker.com ---

(b) Write brief on ALCAN process. 04
(c) Explain Mitsubishi process for Copper production. 07

Q.4 (a) Explain how electrolytic refining of tin is carried out. 03
(b) Can Si alone be used as a reducing agent in Pidgeon process? 04
Justify your answer.

--- Content provided by​ FirstRanker.com ---

(c) Explain the scheme of operations in the hydrometallurgical 07
extraction of zinc.

OR

Q.4 (a) Why MgCO₃ cannot be used for the Pidgeon process? 03
(b) Why is scrap iron used in lead blast furnace? Discuss. 04

--- Content provided by​ FirstRanker.com ---

(c) Furnish a flow sheet for obtaining nickel from its sulphide ore 07
with relevant process details.

Q.5 (a) Explain the carbonyl process for refining of nickel. 03
(b) With the help of suitable examples, explain the unit operations 04
involved in hydrometallurgical extraction.

--- Content provided by⁠ FirstRanker.com ---

(c) Discuss the amalgamation and chlorination process for gold 07
extraction.

OR

Q.5 (a) Give the ores of nickel with their chemical formula. 03
(b) Differentiate between reverberatory furnace smelting and rotary 04

--- Content provided by‌ FirstRanker.com ---

furnace smelting process for tin extraction.
(c) Write a note on occurrence of silver. Discuss the Parke’s process 07
for silver recovery from lead.

FirstRanker.com

--- Content provided by‍ FirstRanker.com ---