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  • Which one of the following statements is incorrect?  Option: 1 In the Haber process, ammonia is synthesized by the reaction of nitrogen a

Which one of the following statements is incorrect?
 

Option: 1

In the Haber process, ammonia is synthesized by the reaction of nitrogen and hydrogen gases.


Option: 2

Copper is extracted from its chief ore by smelting with carbon.


Option: 3

Iron is obtained from its oxide ore by reduction with carbon monoxide in a blast furnace.

 


Option: 4

Extraction of silver involves the leaching of ore with nitric acid followed by reduction with copper.


Answers (1)

best_answer

A) In the Haber process, ammonia is synthesized by the reaction of nitrogen and hydrogen gases.
This statement is correct. The Haber process is a chemical process that combines nitrogen gas \left(\mathrm{N}_2\right) and hydrogen gas \left(\mathrm{H}_2\right) under high pressure and temperature, with the help of a catalyst, to produce ammonia ( \mathrm{NH}_3 ).

B) Copper is extracted from its chief ore by smelting with carbon. This statement is correct. Copper is commonly extracted from its chief ore, copper pyrite \mathrm{( C u F e S_2 )}, by smelting. In the smelting process, the ore is heated with carbon (usually in the form of coke) to obtain crude copper.

C) Iron is obtained from its oxide ore by reduction with carbon monoxide in a blast furnace. This statement is correct. Iron is primarily obtained from its oxide ores, such as hematite ( \left.\mathrm{Fe}_2 \mathrm{O}_3\right) and magnetite \left(\mathrm{Fe}_3 \mathrm{O}_4\right. ), through a process called reduction. In a blast furnace, iron ore is mixed with coke and heated in the presence of carbon monoxide (\mathrm{CO}), which acts as a reducing agent, to produce molten iron.

D) Extraction of silver involves the leaching of ore with nitric acid followed by reduction with copper.
This statement is incorrect. The extraction of silver involves a different process called parting. In parting, the silver ore is treated with a solution of dilute nitric acid \mathrm{\left(H N O_3\right)} to dissolve the silver and form silver nitrate ( \mathrm{AgN} \mathrm{O}_3 ). The dissolved silver is then separated from the solution by precipitation or other methods. The process does not involve reduction with copper.

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