Statement Type Principles and Processes of Isolation of Elements Questions for NEET
In each of the following questions a statement I is given followed by a correspond statement II just below it. Mark the correct answer from the following statements.
1. Statement I and statement II are correct and statement II is the correct explanation of statement I
2. Statement I and statement II are correct but statement II is not the correct explanation of statement I.
3. Statement I is correct but statement II is false
4. Statement I if false but statement II is correct.
1. Statement I: In the extraction of Ag, Complex Na[Ag(CN)2] is reacted with zinc
Statement II: Zn is a d – block metal
2. Statement I: In the electrolytic extraction of aluminium from alumina cryolite is used
Statement II: Cryolite dissolves alumina
3. Statement I: All the ores are minerals
Statement II: Ores contains metals in combined state
4. Statement I: Wrought iron is more malleable and ductile than steel
Statement II: It contains slightly less percentage of carbon
5. Statement I: Nitriding is the process of heating steel in presence of N2 to form iron nitrides
Statement II: The surface of steel becomes hard after nitriding process
6. Statement I: Chalcopyrites is concentrated by froth floatation method
Statement II: CuFeS2 is the chief ore of copper
7. Statement I: Ores are generally converted into oxides, prior to reduction
Statement II: Metal oxides can be easily reduced
8. Statement I: In froth floatation method sodium ethyl xanthate is used as a collector
Statement II: Sulphide ore particles are covered by sodium ethyl xanthate so that they are not wetted by water and come into froth
9. Statement I: Lead, tin and bismuth are purified by liquation method
Statement II: Lead, tin and bismuth have low melting point as compared to impurities
10. Statement I: Reduction of ZnO with carbon is done at 1100 C°
Statement II: ΔG° is negative at this temperature, this process is spontaneous
11. Statement I: Metals of high purity are obtained by zone refining
Statement II: Impurities are more soluble in the melt than pure solid metal
12. Statement I: Au, Pt, Ag, etc. are found in free state
Statement II: The metals which are noble and chemically less reactive are found in free state
13. Statement I: Autoreduction of ore is used for the extraction of copper
Statement II: The sulphide ore of copper reacts with its oxide to give the metal
14. Statement I: Carnallite is a mineral of magnesium
Statement II: Sodium is extracted by electrolysis ofaqueous sodium chloride solution
15. Statement I: Ag and Au are extracted by leaching the ores with a dilute solution of NaCN in presence of oxygen
Statement II: Gangue particles dissolve in NaCN solution
Answer
Class-11
Class-12
1. Statement I and statement II are correct and statement II is the correct explanation of statement I
2. Statement I and statement II are correct but statement II is not the correct explanation of statement I.
3. Statement I is correct but statement II is false
4. Statement I if false but statement II is correct.
1. Statement I: In the extraction of Ag, Complex Na[Ag(CN)2] is reacted with zinc
Statement II: Zn is a d – block metal
2. Statement I: In the electrolytic extraction of aluminium from alumina cryolite is used
Statement II: Cryolite dissolves alumina
3. Statement I: All the ores are minerals
Statement II: Ores contains metals in combined state
4. Statement I: Wrought iron is more malleable and ductile than steel
Statement II: It contains slightly less percentage of carbon
5. Statement I: Nitriding is the process of heating steel in presence of N2 to form iron nitrides
Statement II: The surface of steel becomes hard after nitriding process
6. Statement I: Chalcopyrites is concentrated by froth floatation method
Statement II: CuFeS2 is the chief ore of copper
7. Statement I: Ores are generally converted into oxides, prior to reduction
Statement II: Metal oxides can be easily reduced
8. Statement I: In froth floatation method sodium ethyl xanthate is used as a collector
Statement II: Sulphide ore particles are covered by sodium ethyl xanthate so that they are not wetted by water and come into froth
9. Statement I: Lead, tin and bismuth are purified by liquation method
Statement II: Lead, tin and bismuth have low melting point as compared to impurities
10. Statement I: Reduction of ZnO with carbon is done at 1100 C°
Statement II: ΔG° is negative at this temperature, this process is spontaneous
11. Statement I: Metals of high purity are obtained by zone refining
Statement II: Impurities are more soluble in the melt than pure solid metal
12. Statement I: Au, Pt, Ag, etc. are found in free state
Statement II: The metals which are noble and chemically less reactive are found in free state
13. Statement I: Autoreduction of ore is used for the extraction of copper
Statement II: The sulphide ore of copper reacts with its oxide to give the metal
14. Statement I: Carnallite is a mineral of magnesium
Statement II: Sodium is extracted by electrolysis ofaqueous sodium chloride solution
15. Statement I: Ag and Au are extracted by leaching the ores with a dilute solution of NaCN in presence of oxygen
Statement II: Gangue particles dissolve in NaCN solution
Answer
| 1 - 3 | 2 - 1 | 3 - 2 | 4 - 1 | 5 - 4 |
| 6 - 2 | 7 - 3 | 8 - 1 | 9 - 1 | 10 - 1 |
| 11 - 1 | 12 - 1 | 13 - 1 | 14 - 3 | 15 - 3 |
Class-11
Class-12
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