Answer this and you will be the ! you are hiking one day and find two minerals and take them to your next science class. after testing, you discover that one has a chemical composition of nacaalf and one has a chemical composition of fecro. how would you classify these rocks, respectively? a. halide; halide b. halide; oxide c. oxide; silicate d. carbonate; halide

               Option-B (Halide; oxide) is the correct answer.

                  Halides are those substances which contains negatively charged halide ion i.e. X⁻.

Examples:  F⁻ (Fluoride) , Cl⁻ (Chloride) , Br⁻ (Bromide) , I⁻ (Iodide) e.t.c.

                   Oxides are those substances which atleast containn one Oxygen atom.

Examples:  FeO (Iron Oxide), Cr₂O₃ (Chromium Oxide)

                   Silicates are those anionic substances which contains silicon and oxygen with general formula  [SiO. 4−x] n.

Examples: [SiO₄]⁻⁴ (Nasosilicate) , [Si₂O₇]⁻⁶ (Sorosilicates)

                   Carbonates are those substances which contains carbonate anion i.e. CO₃²⁻.

Examples:  Na₂CO₃ (Sodium Carbonate) , MgCO₃ (Magnesium Carbonate)

                   As in NaCaAlF, F⁻ is present hence, it is an Halide and the presence of O in FeCrO makes it Oxide.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.