हिंदी

State whether the following statement is true or false: Ships suffer a lot of damage though they are painted. - Science

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प्रश्न

State whether the following statement is true or false:

Ships suffer a lot of damage though they are painted.

विकल्प

  • True

  • False

MCQ
सत्य या असत्य
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उत्तर

This statement is True.

Explanation:

While ships are painted to protect them from the harsh marine environment, they can still suffer damage. The paint acts as a protective layer against corrosion caused by water, salt and marine organisms, but over time, the paint can wear off due to factors like weathering, abrasion and biofouling. Therefore, despite being painted, ships may still experience damage to their hulls and other parts.

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 6: Physical and Chemical Changes - VERY SHORT ANSWER QUESTIONS [पृष्ठ ३५]

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एनसीईआरटी एक्झांप्लर Science [English] Class 7
अध्याय 6 Physical and Chemical Changes
VERY SHORT ANSWER QUESTIONS | Q 11. (c) | पृष्ठ ३५

संबंधित प्रश्न

Two methods by which rusting of iron can be prevented are ______ and ______.


What is meant by galvanisation? Why is it done?


Fill in the following blank with suitable word:
The process of depositing a thin layer of zinc on iron articles is called .............


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Observe the following picture and answer the following questions:

  1. What is rust?
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  3. Write the reaction of oxidation of iron at the anode.
  4. Write the reaction of oxidation of iron at the cathode.
  5. What is corrosion?

Rusting of iron : Fe2O3 : : corrosion of copper : ______


Find the odd one out and give its explanation.


Observe the following figure and write the answer of the question.

  1. Which process is shown in the figure?
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  3. Write the reactions on anode and cathode.

What is rust?


A process of forming a thick oxide of aluminium when aluminium is exposed to air. This coat makes it resistant to corrosion. Resistance can be improved by making a layer of oxide thinker. In this technique, the aluminium article is the anode, and the electrolyte is sulphuric acid. The anode reaction results in the formation of a black-coloured film of aluminium oxide on the anode. By putting appropriate dyes in the electrolytic solution, both coloured surface with the decorative finish is achieved. Kitchen articles like anodised such as pressure cookers, pans and frames of sliding windows are applications of this technique.
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  2. How can we make aluminium articles made resistant to corrosion?
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