MCQ
Galvanisation is the
- ✓Deposition of $Zn$ on $Fe$
- BDeposition of $Al$ on $Fe$
- CDeposition of $Sn$ on $Fe$
- DDeposition of $Cu$ on $Fe$
✓
Answer
Correct option: A.
Deposition of $Zn$ on $Fe$
a
Galvanization is the process of applying a protective zinc coating to steel or iron, to prevent rusting.
Galvanization is the process of applying a protective zinc coating to steel or iron, to prevent rusting.
It forms a deposition of zinc which prevents corrosive substances from reaching the underlying steel or iron.
The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc.
The zinc protects its base metal by corroding before iron.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The standard reduction potential values of the three metallic cations $x, y, z$ are $0.52\, V, -3.03\,V$ and $-1.18\,V$ respectively. The order of reducing power of their corresponding metals will be
→The following experimental rate data were obtained for a reaction carried out at $25^{\circ} C :$
$A_{(g)}+B_{(g)} \rightarrow C_{(g)}+D_{(g)}$
→$A_{(g)}+B_{(g)} \rightarrow C_{(g)}+D_{(g)}$
| Initial $[A_{(g)}]/mol \ dm^{-3}$ | Initial $[B_{(g)}]/mol \ dm^{-3}$ | Initial rate$/mol \ dm^{-3}S^{-1}$ |
| $3.0 \times 10^{-2}$ | $2.0 \times 10^{-2}$ | $1.89 \times 10^{-4}$ |
| $3.0 \times 10^{-2}$ | $4.0 \times 10^{-2}$ | $1.89 \times 10^{-4}$ |
| $6.0 \times 10^{-2}$ | $4.0 \times 10^{-2}$ | $7.56 \times 10^{-4}$ |
When sodium is dissolved in liq. $NH_3$ the solution becomes blue due to presence of
→$200\,ml$ of a solution contains $5.85\,g$ dissolved sodium chloride. The concentration of the solution will be .......... $molar$ $(Na = 23;\,\,\,Cl = 35.5)$
→'$R$' formed in the following sequence of reaction is:
→Peptization denotes:
Which of the following is by-product in the reaction of obtaining phenol from cumene?
The decreasing order of reactivity of above compound towards $\mathop {Na}\limits^ \oplus \mathop O\limits^\ominus Me$ is
→Which of the following does not show mutarotation
Consider the following statements :
→According the Werner's theory.
$(1)$ Ligands are connected to the metal ions by covalent bonds.
$(2)$ Secondary valencies have directional properties
$(3)$ Secondary valencies are non-ionisable
Of these statements :