Race Institute

South Usman Road,

Opposite to bus terminal,

Thyagaraya Nagar

Chennai - 600 017.

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Contact Person:

Ms.Priya

 

1.The most abundant metal in the earth’s crust is:

A. Zinc

B. Copper

C. Aluminum

D. Iron


Correct Answer is:c

Explanation:

Aluminum is the most abundant metal in the earth's crust, it is never found free in nature. All of the earth's aluminum has combined with other elements to form compounds. Two of the most common compounds are alum, such as potassium aluminum sulfate (KAl(SO4)212H2O), and aluminum oxide (Al2O3). About 8.2% of the earth's crust is composed of aluminum."

Zinc, is a metallic chemical element; it has the symbol Zn andatomic number 30. It is the first element in group 12 of the periodic table. Zinc is, in some respects, chemically similar to magnesium, because its ion is of similar size and its only common oxidation state is +2. Zinc is the 24th most abundant element in the Earth's crust and has five stable isotopes.

Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a ductile metal with very highthermal and electrical conductivity. Pure copper is soft and malleable; a freshly exposed surface has a reddish-orange color. It is used as a conductor of heat and electricity, a building material, and a constituent of various metal alloys.

Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is the most common element forming the planet Earth as a whole, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust and very common presence in rocky planets like Earth is due to its abundant.