Chemistry Question Bank

Silver is extracted from its native ore by:

Which of the following reactions does not occur in Bessemer converter in the extraction of copper from chalcopyrites?

During the process of electrolytic refining of copper, some metals present as impurity settle as ‘anode mud’. These are

Refining of impure copper with zinc impurity is to be done by electrolysis using electrodes as Cathode Anode

The methods chiefly used for the extraction of lead and tin from their ores are respective

Consider the following metallurgical processes: (I) Heating impure metal with CO and distilling the resulting volatile carbonyl (b.p. 430C) and finally decomposition at 1500-2000C to get the pure metal (II) Heating th…

Which of the following pair of ores cannot be converted into corresponding metals by pyrometallurgy?

Formation of metallic copper from the sulphide ore in the commercial metallurgical process involves. (a) Cu S+ O Cu O+SO ; Cu O+C 2Cu+CO -> -> (b) Cu S O Cu O SO ; 2Cu O Cu S 6Cu SO -> -> (c) Cu S 2O CuSO ; CuSO C…

Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly

Select correct statement:

Boron can be obtained by various methods but not by:

Among the following statements, the incorrect one is:

Carbonate of which of the following metal does not liberate carbon dioxide on heating:

The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is

The two most abundant metals in the earth crust are:

Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature? (NEET 2021)

Identify the correct statement from the following: (NEET 2020)

Which of the following has maximum iron content? (AIIMS 2019)

Identify the incorrect statement. (Odisha NEET 2019)

Which one is malachite from the following? (NEET 2019)

In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu2O with (JIPMER 2018)

In Cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents are respectively. (JIPMER 2017)

Match items of Column I with the items of Column II and assign the correct code : (NEET-I 2016) Column I Column II

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with (NEET 2016)

Which one is malachite from the following? (NEET 2015) (a) 2 Cu OH (b) Fe O (c) CuCO .Cu OH (d) CuFeS