Question

plz answer this asap​

Answer 1

Answer:

i)Because iron is more reactive than copper,so it displaces it

ii)fe+cus04-feso4+cu

iii)displacement

iv)iron

Answer 2

Answers:

1) The nail turned brown due to the deposition of copper on the nail.

2) Copper Sulphate (blue) + Iron nail (silver) → Ferrous Sulphate (green) + Copper (brown)

3) Displacement reaction

4) Iron is more reactive in the given reaction.

Knowledge Bytes:

→ Displacement Reaction:

Displacement reaction is a chemical reaction in which a more reactive metal displaces a less reactive metal from its salt solution.

The reactivity table is given below:

$\setlength{\unitlength}{0.8 cm}\begin{picture}(20,15)\thicklines\put(5,9.5){\large {\boxed{ \sf{Reactivity \:  series}}}}\put(0.8,8){\large\sf K \qquad\qquad\qquad Potassium\qquad\qquad\qquad \: maximum}\put(0.8,7.2){\large\sf Na \qquad\qquad\qquad Sodium\qquad\qquad\qquad\quad \: reactivity}\put(0.8,6.2){\large\sf Ca\qquad\qquad\qquad \: Calcium}\put(0.8,5.2){\large\sf Mg\qquad\qquad\quad \: Magnesium}\put(0.8,4.2){\large\sf Al\qquad\qquad\qquad \: Aluminium\qquad\qquad\qquad \: decreasing}\put(0.8,3.2){\large\sf Zn\qquad\qquad\quad\qquad \: Zinc\qquad\qquad\qquad\qquad \:reactivity}\put(0.8,2.2){\large\sf Fe\qquad\qquad\quad\qquad Ferrous}\put(0.8,1.2){\large\sf Pb\qquad\qquad\qquad \: \:\: Lead}\put(0.8,0.2){\large\sf H\qquad\qquad\qquad \:  \:Hydrogen}\put(0.8, - 0.6){\large\sf Cu\qquad\qquad\qquad \: Copper}\put(0.8, - 1.5){\large\sf Hg\qquad\qquad\qquad \: Mercury}\put(0.8, - 2.5){\large\sf Ag\qquad\qquad\qquad \: \:Silver}\put(0.8, - 3.5){\large\sf Au\qquad\qquad\qquad \: \:  Gold\qquad\qquad\qquad\quad \:  \: minimum reactivity}\put(9.3,8.2){\vector(0, - 2){12}}\end{picture}$

Please refer attachment to view the image.

The most common displacement reaction is that of the copper sulphate with the iron nail where the more reactive metal iron, displaces copper from its salt solution.

CuSO₄ + Fe → FeSO₄ + Cu