Answer: Option D. -> All of the above
Recrystallization temperature can be lowered by Purification of metal and Grain refinement and Working at lower temperature

Answer: Option C. -> Ability to undergo large permanent deformations in tension
Ductility of a material has been defined as a ability of a material to undergo permanent deformation through elongation and reduction in cross-sectional area or bending at room temperature without fracturing.

Answer: Option A. -> Ability to undergo large permanent deformations in compression
Malleability is a physical property of metals that defines the ability to be hammered, pressed or rolled into thin sheets without breaking.

Answer: Option C. -> 60 : 40
Muntz metal is about 60% copper, 40% zinc

Answer: Option D. -> Toughness
Resilience: The ability of a material to absorb energy under elastic deformation and to recover this energy upon removal of load is termed as resilience. Resilience is indicated by the area under the stress strain curve till the point of elastic limit.
Creep: It is a deformation of a material due to the constant load for a long period of time. It is time and temperature dependent property of material.
Fatigue: When a body is subjected to repeated and fluctuating load it tends to develop a characteristic behavior under which failure occurs which is referred to as fatigue.
Toughness: The ability of a material to absorb energy in plastic deformation till the point of fracture is known as toughness. Toughness is indicated by the total area under the stress strain curve up to the fracture point. Eg. Copper has higher toughness than Cast iron.

Answer: Option B. -> 88% copper and 12% tin
Bronze is an alloy consisting primarily of copper, commonly with about 12 - 12.5% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.

Answer: Option D. -> It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
Some Properties of wrought iron is listed below:
It contains carbon of the order of 0 to 0.25%
It melts at 1535°C
It is very soft and ductile

Answer: Option B. -> Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture
Brittle Fracture is the sudden, very rapid cracking of equipment under stress where the material exhibited little or no evidence of ductility or plastic degradation before the fracture occurs.
metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture

Answer: Option A. -> 70% copper and 30% zinc
Brass contains 70% copper and 30% zinc

Answer: Option A. -> 0.025%
Below 912°C (1,674°F) iron again adopts the BCC structure characteristic of α-iron, also called ferrite.
The substance assumes a paramagnetic property. Carbon dissolves poorly in α-iron: no more than 0.021% by mass at 723°C