Cu
F
Co
Answer: Option (a) is the correct answer.
Explanation:
Based on reactivity series, the reactivity of some metals in decreasing order is as follows.
Li, K, Ba, Ca, Mg, Al, Mn, Zn, Cr, Fe, Co, Ni
Thus, it can be seen that Al is more reactive than Fe, so it will replace iron in a single displacement reaction. Whereas cobalt is less reactive than iron hence, it will not replace Fe.
Fluorine being an anion will not replace a cation because in displacement reactions, only a cation can replace another cation and an anion can replace another anion.
Hence, we can conclude that Al will replace iron (Fe) in a compound during a single replacement reaction.
• 3 (100 cm³) conical flasks
• 3 balloons
• 3 rubber bands
• 3 indigestion tablets
• water
• alcohol
• measuring cylinder
• stopwatch
• mass balance
Electrophiles are positively charged or neutral species having empty orbitals that are attracted to an electron rich center. Examples of these are the Bronsted acid. Bronsted acid accepts an electron pair for hydrogen.
Public Domain
Sea arch
Sea cave
Sea cliff
Sea stack
The answer is "sea stack" or the fourth option. Sea stacks are tall pieces of land in the ocean that had been eroded all the way to look like a stack of rocks. Sea stacks look like this:
Hope this helps!