NEET Chemistry General Principles and Processes Of Isolation Of Elements MCQs Set B

Question: Which of the following elements is present as the impurity to the maximum extent in the pig iron?

• a) Phosphorus
• b) Manganese
• c) Carbon
• d) Silicon

Answer: Carbon

Question: The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag

• a) CaO(s) + SiO₂(s) →CaSiO₃(s) 
• b) 2C(s) + O₂(g) →2CO(g)
• c) Fe₂O₃(s) + 3CO(g) → 2Fe(l) + 3CO₂(g) 
• d) CaCO₃(s) → CaO(s) + CO₂(g)

Answer:  CaO(s) + SiO₂(s) →CaSiO₃(s) 

Question:  Match List-I (substances) with List-II (process) employed in the manufacture of the substances and select the correct option

• a) a(i), b(iv), c(ii), d(iii)
• b) a(i), b(ii), c(iii), d(iv)
• c) a(iv), b(iii), c(ii), d(i)
• d) a(iv), b(ii), c(iii), d(i)

Answer: a(iv), b(ii), c(iii), d(i)

Question: Which of the following statements, about the advantage of roasting sulphide ore before reduction is not true?

• a) Roasting of the sulphide to the oxide is thermodynamically feasible
• b) Carbon and hydrogen are suitable reducing agents for metal sulphides
• c) The Δ_f G° of the sulphide is greater than those for CS₂ and H₂S
• d) The Δ_f G° is negative for roasting of sulphide ore to oxide

Answer: Carbon and hydrogen are suitable reducing agents for metal sulphides

Question: Sulphides ores of metals are usually concentrated by Froth Floatation process. Which one of the following sulphides ores offers an exception and is concentrated by chemical leaching ?

• a) Sphalerite
• b) Argentite
• c) Galena
• d) Copper pyrite

Answer: Argentite

Question: The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (Atomic mass Al= 27)

• a) 180 kg
• b) 270 kg
• c) 540 kg
• d) 90 kg

Answer: 90 kg

Question: In which of the following process fused sodium chloride is electrolysed for extraction of sodium?

• a) Castner process
• b) Cyanide process
• c) Down's process
• d) Both (2) & (3)

Answer: Down's process

Question: Which of the following does not contain aluminium?

• a) Cryolite
• b) Fluorspar
• c) Feldspar
• d) Mica

Answer: Fluorspar

Question: Which of the following does not contain Mg?

• a) Magnetite
• b) Asbestos
• c) Magnesite
• d) Carnalite

Answer: Magnetite

More Questions........................................

Question: Carborundum is

• a) CaC₂
• b) CaCO₃
• c) Fe₃C 
• d) SiC

Answer: SiC

Question: Bessemer converter is used for manufacture of

• a) Steel
• b) Wrought iron
• c) Pig iron
• d) Cast iron

Answer: Steel

Question:  Which process of purification is represented by following scheme?

• a) Poling
• b) Electro refining
• c) Zone refining
• d) van Arkel process

Answer: van Arkel process

Question: Mond's process is used for

• a) Ni
• b) Al
• c) Fe
• d) Cu

Answer: Ni

Question: Which of the following sulphides when heated strongly in air gives the corresponding metal?

• a) CuS
• b) Fe₂S₃
• c) FeS
• d) HgS

Answer: HgS

Question: Most important ore of tin is

• a) Cassiterite
• b) Cryolite
• c) Malachite
• d) All of these

Answer: Cassiterite

Question: Heating of ore in presence of air to remove sulphur impurities is called

• a) Calcination
• b) Roasting
• c) Smelting
• d) None of these

Answer: Roasting

Question: Sodium is extracted from

• a) NaCl(aq)
• b) NaCl(l)
• c) NaOH(aq)
• d) NaNO₃(aq) 

Answer: NaCl(l)

Question: Among the metals, the one that cannot be obtained by reduction of its metal oxide

• a) Cr
• b) Fe
• c) Mn
• d) Mg

Answer: Mg

Question: Which of the following is used as depressant in the separation of mixture of PbS and ZnS?

• a) NaCN
• b) NaCl
• c) AgCl
• d) All of these

Answer: NaCN

Question: Which contains both iron and copper?

• a) Cuprite
• b) Chalcocite
• c) Chalcopyrite
• d) Malachite

Answer: Chalcopyrite

Question: To dissolve argentite ore which of the following is used?

• a) Na[Ag(CN)₂] 
• b) NaCN
• c) NaCl
• d) HCl

Answer: NaCN

Question: Iron obtained from blast furnace is

• a) Wrought iron
• b) Cast iron
• c) Pig iron
• d) Steel

Answer: Pig iron

Question: Elements used as semiconductor are purified by

• a) Van Arkel method
• b) Mond process
• c) Distillation
• d) Zone refining

Answer: Zone refining

Question: Which of the following oxide is least stable?

• a) CO₂
• b) CO
• c) MgO
• d) HgO

Answer: HgO

Question: Roasting of sulphides gives the gas X as a by- product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid is known only in solution. The gas X is

• a) SO₂ 
• b) CO₂
• c) SO₃ 
• d) H₂S

Answer:  SO₂ 

Question: The inner layer of a blast furnace is made of

• a) Graphite bricks
• b) Silica bricks
• c) Basic bricks
• d) Fireclay bricks

Answer: Fireclay bricks

Question: Which of the following mineral contains calcium as well as magnesium?

• a) Tridymite
• b) Aragonite
• c) Dolomite
• d) Carnalite

Answer: Dolomite

Question: Identify the alloy containing a non-metal as a constituent in it.

• a) Bell metal
• b) Bronze
• c) Invar
• d) Steel

Answer: Steel

Question: Which of the following does not contain aluminium?

• a) Cryolite
• b) Fluorspar
• c) Feldspar
• d) Mica

Answer: Fluorspar

Question: Which of the following give respective metal by self reduction?

• a) Galena PbS
• b) HgS
• c) ZnS
• d) Both (1) & (2)

Answer: Both (1) & (2)