f.3 Chem question (15 marks!!!)

easy,let me tell you the answer and why,ok?
(a) oil:
Many edible vegetable and animal oils,
Health advantages are claimed for a number of specific oils such as omega 3 oils (fish oil, flaxseed oil, etc) and evening primrose oil.

Trans fats, often produced by hydrogenating vegetable oils, are known to be harmful to health.



(b) dry ice:
Dry ice is solid carbon dioxide.[1] It is commonly used as a versatile cooling agent.

Dry ice sublimates, changing directly to a gas at atmospheric pressure. Its sublimation and deposition point is -78.5 °C (-109.3 °F). Its enthalpy of sublimation (ΔHsub) at -78.5 °C (-109.3 °F) is 571 kJ/kg (245.5 BTU/lb). Dry ice density is usually between 1.2 and 1.6 kg/dm³.



(c) aluminium: Instead, it is found combined in over 270 different minerals.[1] The chief source of aluminium is bauxite ore.

Aluminium is remarkable for its ability to resist corrosion (due to the phenomenon of passivation) and its low density.

silver:
Silver has been known since ancient times and has long been valued as a precious metal, used to make ornaments, jewellery, high-value tableware and utensils (hence the term "silverware") and currency coins.
gold:. The metal occurs as nuggets or grains in rocks, underground "veins" and in alluvial deposits. It is one of the coinage metals.

copper:Copper (pronounced /ˈkɒpɚ/) is a chemical element with the symbol Cu (Latin: cuprum) and atomic number 29.
Copper is an essential trace nutrient to all high plants and animals. In animals, including humans, it is found primarily in the bloodstream, as a co-factor in various enzymes and in copper-based pigments.



(d)lithium:Lithium (pronounced /ˈlɪθiəm/) is a chemical element with the symbol Li and atomic number 3.