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Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]
  • a)
    The ΔGof  of the sulphide is greater than those for CS2 and H2S.
  • b)
    The ΔGof  is negative for roasting of sulphide ore to oxide.
  • c)
    Roasting of the sulphide to the oxide is thermodynamically feasible.
  • d)
    Carbon and hydrogen are suitable reducing agents for metal sulphides.
Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements, about the advantage of roasting of ...
The sulphide ore is roasted to oxide before reduction because the ΔGof of most of the sulphides are greater than those of CS2 and H2S, therefore neither C nor H can reduce metal sulphide to metal. Further, the standard free energies of formation of oxide are much less than those of SO2. Hence oxidation of metal sulphides to metal oxide is thermodynamically favourable.
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Most Upvoted Answer
Which of the following statements, about the advantage of roasting of ...
Roasting process converts sulphide ores into oxide ores.
b)The roasting process removes impurities such as arsenic and antimony.
c)The roasting process facilitates the reduction of the oxide ore to the metal.
d)The roasting process increases the yield of metal obtained from the ore.

Answer: a) The roasting process converts sulphide ores into oxide ores. (This statement is false because roasting converts sulphide ores into sulphates or oxides, not just oxide ores.)
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Read the passage given below and answer the following questions:Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination; most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives; this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically:Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an additional compound, a Schiff's base (RCH= NCH2R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines.Similar reactions may occur when the carbonyl compound employed is a ketone.Q. The reaction of ammonia and its derivatives with aldehydes is called

Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Which of the following statements, about the advantage of roasting of sulphideore before reduction is not true? [2007]a)The ΔGof of the sulphide is greater than those for CS2 and H2S.b)The ΔGof is negative for roasting of sulphide ore to oxide.c)Roasting of the sulphide to the oxide is thermodynamically feasible.d)Carbon and hydrogen are suitable reducing agents for metal sulphides.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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