Quiz-14-metallurgy

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GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS Quiz-14

Dear Readers,

The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry. .

Q1. Which set of elements is called chalcogens?

•  Cl,Br,I
•  O,S,Se
•  N,P,As
•  C,Si,Ge

Solution
Oxygen family is known as chalcogens

Q2. The smelting of iron in a blast furnace involves all the steps except:

•  Reduction
•  Fusion
•  Decomposition
•  Sublimation

Solution
It is a fact.

Q3. Refractory materials are generally used in furnaces because

•  They can withstand high temperature
•  They are chemically inert
•  They do not require replacement
•  They possess great structural strength

Solution
Refractory materials are the substances which can withstand very high temperature without melting or becoming salt

Q4. Which pair of elements can form alloy?

•  Zn and Pb
•  Fe and Hg
•  Fe and C
•  C and Pt

Solution
Fe-C form alloy.

Q5.Which method of purification is represented by the following equation?

•  Cupellation
•  Poling
•  Van Arkel
•  Zone refining

Solution
 This is Van-Arkel method for purification of Ti.

Q6. Cassiterite is an ore of

•  Sb
•  Mn
• Sn
•  Ni

Solution
Cassiterite is an ore of tin

Q7.Calamine is

•  CaCO₃
•  MgCO₃
•  ZnCO₃
•  CaCO₃+CaO

Solution
Calamine is the carbonate ore zinc (ZnCO₃)

Q8.Forth floatation process for the concentration of the ores is an illustration of the practical application of

•  Adsorption
•  Sedimentation
•  Coagulation
•  Absorption

Solution
The adsorption phenomenon is involved in the forth floatation process

Q9.Oxidation method is used for refining of:

•  Pb
•  Cu
•  Hg
•  All of these

Solution
Pb,Cu, and Hg all are refined by Oxidation method.

Q10. Which is not an ore of lead?

•  Galena
•  Cassiterite
•  Anglesite
• Cerussite

Solution
Cassiterite is an ore of tin.