Corrosion and Its PreventionPractice Questions & MCQs
Practice Corrosion and Its Prevention questions from Metals and Non-metals (Class 10 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Corrosion and Its PreventionQuiz - Solve & Score
Q1. Which method protects iron with a coating of a LESS reactive metal acting only as a barrier?
- A.cathodic protection
- B.sacrificial protection
- C.tinning
- D.galvanising
Answer: C. tinning
Quick parse - a typical chemistry numerical. We are after the quantity the stem asks for. Tool of choice - hence the answer = tinning. Rearrange it for the unknown before substituting. Common-sense check: the reactivity series runs K > Na > Ca > Mg > Al > Zn > Fe > Pb > (H) > Cu > Hg > Ag > Au. Lock in option C) tinning. Trap-watch: option A) 'cathodic protection' doesn't hold - That uses a more reactive anode metal; option B) 'sacrificial protection' is incorrect: That uses a more reactive metal.
Q2. Which is NOT a method of preventing corrosion of iron?
- A.greasing
- B.painting
- C.keeping it in a damp store-room
- D.galvanising
Answer: C. keeping it in a damp store-room
Q3. Consider the following statements about corrosion and its prevention: (I) Rusting requires both oxygen and moisture. (II) Galvanisation uses a zinc coating. (III) Painting increases the rusting of iron. Which of the above statement(s) is/are correct?
- A.Only I and II
- B.Only I
- C.None of these
- D.Only III
Answer: A. Only I and II
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