AP SSC 10th Class Physical Science Chapter 13 Solution – Principles of Metallurgy

AP SSC 10th Class Physical Science Chapter 13 Solution – Principles of Metallurgy

Andhra Pradesh SSC 10th Class Physical Science Chapter 13 Principles of Metallurgy Solution for AP SSC 10th Class Physics/Chemistry Exam. Lots of Students of Andhra Pradesh Board will search on internet for Andhra Pradesh Class 10 Physical Science Textbook Solution or Study Material for AP SSC 10th exam. Here you search will end! Here in this page we have provided for all question answer for Chapter 13 Principles of Metallurgy.

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AP 10th Class Physics Chapter 13 Principles of Metallurgy Solution

(1) List three metals that are found in nature as Oxide ores. (AS1)

Ans:-The metals which are found in nature as oxide are Fe, Zn, and Mn.

(2) List three metals that are found in nature in uncombined form. (AS1)

Ans: – The metals which are found in nature in uncombined form is silver, gold and platinum.

(3) Write a note on dressing of ore in metallurgy? (AS1)

Ans:-The metal ore after recovering from the mines it going on various process to remove impurities present in it. As when it collected there are various impurities present like soil, sand, gravel etc. This process is known as dressing.

(4) What is an ore? On what basis a mineral is chosen as an ore? (AS1)

Ans: – The maximum percentage of any metal present on which mineral are known as ore. To called an ore of a metal there must be maximum availability of that metal in the mineral should be present.

(6) How do metals occur in nature? Give examples to any two types of minerals. (AS1)

Ans: – In the nature metal present in different types in any compound. Some of the metal are less reactive, some most reactive, some less reactive. The oxides mineral is hematite (Fe2O3), and the supplied mineral is galena (PbS).

(7) Write short notes on froth floatation process? (AS1)

Ans: – The froth floatation process is mainly used for the sulphide material.In this process ore are kept in water solution including pine oil and then air is passes through it. As a result we see that the impurities are being left under and ore are present in upper portion.

(8) When do we use magnetic separation method for concentration of an ore? Explain with an example? (AS1)

Ans: – The magnetic separation is used for the concentration of magnetic material. In this process magnetic belt attract the mineral and the impurities are left away. For the extraction of iron from hematite (Fe2O3) we use this process.

(9) Write short notes on each of the following: (AS1)

i) Roasting ii) Calcination iii) Smelting.

Ans:-i) Roasting: – In this process the ore of the metal are heated below to its melting point in the presence of oxygen. The sulphide ore are seen to follow this process.

ii) Calcination:-Here in this process ore of any material are heated in absent of air.

iii) Smelting: – After mixing the ore with flux and fuel it strongly heated. And for that the impurities are being made into slag with the reaction of flux.

(10) What is the difference between roasting and calcinations? Give one example for each? (AS1)

Ans: – Roasting process in the presence of air whereas the calcination takes places in absent of water. Zn. is separated by roasting and Ca is separated by calcination.

(11) Define the terms i) gauge ii) slag. (AS1)

Ans: – i) gauge: – It is the impurities of the ore which are left after the extraction of metal from ore.

ii) Slag: – when the impurities present in the ore make get oxidized by reaction and produce slag.

(12) Magnesium is an active metal if it occurs as a chloride in nature, which method of reductionis suitable for its extraction? (AS2)

Ans: – Magnesium occurs as chloride in MgCl2 form, so the best way to reduction is electrolysis.

(13) Mention two methods which produce very pure metals? (AS2)

Ans: – The methods which produce very pure metals is electrolysis and reduction.

(14) Which method do you suggest for extraction of high reactivity metals? Why? (AS2)

Ans: – The best method for the extraction of high reactivity metals are electrolysis.

(15) Suggest an experiment to prove that the presence of air and water are essential for corrosion. Explain the procedure. (AS3)

Ans:-After taking two test tube if we place iron nails inside both and make the test tube fill with water and other with anhydrous calcium chlorate. Then we will see after few days the test tube which are filled with water the iron rusted but in other test tube not. As the moisture present in the made this.

(16) Collect information about extraction of metals of low reactivity silver, platinum and gold and prepare a report. (AS4)

Ans:- Silver is extracted from argentite and for that after reaction with NaCN it transfer to sodium argento cyanide and at last with the Zn dust silver is precipitate.

Ag2S + NaCN = 2 Na (Ag (CN) 2) + 2Ag;. Zn + 2Na (Ag (CN) 2) = Na2 (Zn (CN) 4) + 2Ag.

Platinum is rarely found in the nature at its own state. So to extract the ore should smelted with high temperature and the platinum group metal formed then after electrolysis and distillation platinum separated. Gold is separated from ore by various process like cyanide process, carbon in pulp method process. The ground ore of gold when kept in cyanide solution add some Zn and with the reaction with Zn gold is separated from the solution by filtering.

(17) Draw the diagram showing i) Froth floatation ii) Magnetic separation. (AS5)

Ans:

(18) Draw a neat diagram of Reverb oratory furnace and label it neatly? (AS5)

Ans:

(19) What is activity series? How it helps in extraction of metals? (AS6)

Ans:-To collect the metal from the ore we generally go through various way such as its reaction with strong acid or base, cold or hot water. So this is nothing but there reactivity order so and in these reaction make the reactivity series of any ore. There are various way of the activity order that is reduction of the mental oxide with C or CO2 or S. This activity shows in reaction with more reactive element also.

(20) What is thermite process? Mention its applications in daily life? (AS7)

Ans: – when two metal are joined or separated by the mixing of various reactive material in high temperature we see this type of reaction as a thermite process. The railway track are joined by this process.

(21) Where do we use handpicking and washing methods in our daily life? Give examples. How doyou correlate these examples with enrichment of ore? (AS7)

Ans:-The use of hand picking in daily life are cleaning rise, grading vegetables and fruit etc. The use of washing is clean the cloth or removing different substance from food item. When we apply this process to the uses in ore to wash away the different impurities. The denser particle are stayed and less dense are removed.

FILL IN THE BLANK’S:-

(1) The method suitable to enrich the sulphide ores forth flotation.

(2) Arranging metals in the decreasing order of their reactivity is called …activity series……

(3) The method suitable for purification of low boiling metals is ………distillation……

(4) Corrosion of iron occurs in the presence of ……water…….. and ………air……..

(5) The chemical process in which the ore is heated in the absence of air is called …calcination__.

MULTIPLE CHOICE QUESTIONS

(1) The impurity present in the ore is called as __a) Gangue_______

(2) Which of the following is a carbonate ore? :-a) Magnesite.

(3) Which of the following is the correct formula of Gypsum :-a) CuSO4. 2H2.

(4) The oil used in the froth floatation process is _____b) pine oil_____

(5) Froth floatation is method used for the purification of ___a) sulphide___ore.

(6) Galena is an ore of ———b) Pb———

(7) The metal that occurs in the native form is ___b) Au_____

(8) The most abundant metal in the earth’s crust is —b) Aluminum——

(9) The reducing agent in thermite process is _____a) Aluminum______

(10) The purpose of smelting an ore is to ____b) reduce______

Updated: November 12, 2021 — 11:36 pm

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