Metallurgy

Step 1: Define "Ferrous" and "Non-Ferrous" metals. A ferrous metal is any metal that contains iron (from the Latin word {ferrum}). Non-ferrous metals are metals or alloys that do not contain iron in any significant amount.
Step 2: Analyze the options. Iron is the base element of ferrous metals. Steel and Mild Steel are alloys of iron and carbon, making them ferrous. Bronze is an alloy primarily consisting of copper, usually with tin as the main additive. Since its main component is not iron, it is a non-ferrous metal.

Step 1: Define ductility. Ductility is a mechanical property of a material that describes its ability to be stretched, pulled, or drawn into a thin wire without breaking.
Step 2: Compare the ductility of the given metals. While all are metals, their ductility varies. Copper is exceptionally ductile, which is why it is the standard material for electrical wiring. Aluminum is also very ductile. Zinc and tin are comparatively brittle and have much lower ductility. Between aluminum and copper, copper is generally considered to have superior ductility.

Step 1: Define Bronze. Bronze is an alloy, meaning it is a mixture of metals. Its primary component is copper.
Step 2: Identify the other alloying elements. The most common and traditional definition of bronze is an alloy of (A) Copper and (D) Tin. However, the term "bronze" is also used more broadly for copper alloys. Modern bronzes can also contain other elements, including (C) Zinc, to alter their properties. For instance, commercial bronze is 90% copper and 10% zinc. Given the options, the combination that includes the primary components (Copper, Tin) and a common secondary component (Zinc) is the most comprehensive answer.

Step 1: Define malleability. Malleability is the property of a metal that allows it to be hammered, pressed, or rolled into thin sheets without breaking.
Step 2: Order the given metals based on their malleability, from lowest to highest.

(B) Zinc: Is relatively brittle compared to other metals on the list and has low malleability.
(A) Nickel: Is malleable, but less so than copper and silver.
(C) Platinum: Is highly malleable.
(D) Copper: Is very malleable, a standard property for its use in sheets and pipes.
(E) Silver: Is one of the most malleable metals, second only to gold.
The correct sequential order from minimum to maximum malleability is Zinc, Nickel, Platinum, Copper, Silver. This corresponds to the sequence (B), (A), (C), (D), (E). None of the provided options perfectly match this sequence, suggesting a possible error in the question's options.

Step 1: Order the metals based on their malleability from lowest to highest.

(C) Zinc: Is one of the least malleable metals on the list; it can be brittle at room temperature.
(D) Iron: Is malleable, especially when hot, but less so than many other common metals.
(E) Nickel: Has good malleability, superior to iron.
(A) Tin: Is very soft and quite malleable.
(B) Platinum: Is a highly malleable precious metal.

Step 2: Form the sequence. The correct order from minimum to maximum malleability is Zinc, Iron, Nickel, Tin, Platinum. This corresponds to the sequence (C), (D), (E), (A), (B), which matches option (4).

Step 1: Order the metals based on their corrosion resistance in a typical environment, from highest to lowest.

(E) Gold: As a noble metal, it is extremely inert and has the highest resistance to corrosion and oxidation.
(B) Aluminum: Forms a very tough, stable, and self-healing passive layer of aluminum oxide, giving it excellent corrosion resistance.
(C) Copper: Corrodes slowly to form a stable green patina that protects the underlying metal.
(D) Tin: Is quite resistant to corrosion from water but is less resistant than copper or aluminum to other elements.
(A) Zinc: Is the most reactive of the group and corrodes readily. This property is why it is used as a sacrificial coating for steel (galvanization).

Step 2: Form the sequence. The correct order from maximum to minimum resistance is Gold, Aluminum, Copper, Tin, Zinc. This corresponds to the sequence (E), (B), (C), (D), (A), which matches option (2).

Step 1: Understand corrosion resistance. Corrosion resistance is the ability of a metal to withstand degradation due to chemical reactions with its environment. This is often achieved by forming a stable, protective outer layer.
Step 2: Analyze the corrosion behavior of each metal.

Aluminum: Reacts quickly with oxygen in the air to form a very thin, tough, and transparent layer of aluminum oxide. This passive layer is highly inert and protects the metal from further corrosion.
Zinc: Corrodes in preference to steel (which is why it's used for galvanizing), but the corrosion product is not as stable as aluminum's oxide layer.
Copper: Corrodes slowly to form a distinctive green patina (copper sulfate), which can be protective.
Silver: Tarnishes by reacting with sulfur compounds in the air to form black silver sulfide.
Due to its extremely stable and self-healing passive oxide layer, aluminum has the best overall corrosion resistance among the choices in typical atmospheric conditions.

Step 1: Define ductility. Ductility is the ability of a material to be drawn into a thin wire.
Step 2: Order the given metals based on their ductility, from highest to lowest.

(E) Copper: Is highly ductile, a key reason for its use in electrical wiring.
(D) Aluminum: Also very ductile and used for wiring. Generally considered slightly less ductile than copper.
(C) Zinc: Has moderate ductility.
(B) Tin: Has low ductility.
(A) Lead: Is very soft but has very poor ductility; it cannot be easily drawn into a wire.

Step 3: Form the sequence. The correct order from maximum to minimum ductility is Copper, Aluminum, Zinc, Tin, Lead. This corresponds to the sequence (E), (D), (C), (B), (A), which matches option (1).

Step 1: Recall or look up the approximate melting points of the given metals.

Copper (Cu): approx. 1085°C (1984°F)
Aluminium (Al): approx. 660°C (1220°F)
Zinc (Zn): approx. 420°C (787°F)
Tin (Sn): approx. 232°C (450°F)

Step 2: Compare the values. Comparing the melting points, Tin has the lowest value at approximately 232°C. This property makes it useful for solders and alloys like pewter.

Step 1: Define the properties.

Malleability: The ability to be hammered or pressed into a thin sheet.
Hardness: Resistance to scratching or indentation.
Ductility: The ability to be drawn into a wire.
Fragility: The tendency to break or shatter with little to no plastic deformation.

Step 2: Relate the properties to metals. Malleability, ductility, and a general degree of hardness are all hallmark characteristics of most metals. Fragility, however, is the opposite of ductility and malleability. It is a property more commonly associated with non-metallic materials like ceramics and glass. While some metals can be brittle, fragility is not a general, defining characteristic of the metal group.

Step 1: Define an alloy and an element. An element is a pure substance consisting of only one type of atom (e.g., Copper, Zinc, Gold). An alloy is a mixture of two or more elements, where at least one is a metal.
Step 2: Classify the given options. Copper, Zinc, and Gold are all pure metallic elements found on the periodic table. Brass is not an element; it is a well-known alloy made by combining Copper and Zinc.