Rusting
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Slide 1 - Tekstslide
Which is the best method to prevent rusting?
A
Painting
B
Greasing
C
Galvanization
D
Precipitation
Slide 2 - Quizvraag
A man painted his main gate made up of iron, to
i) Prevent it from rusting. ii) Protect it from sun
iii) Make it look beautiful. iv) Make it dust free.
Which of the above statement(s) is/are correct?
i) Prevent it from rusting. ii) Protect it from sun
iii) Make it look beautiful. iv) Make it dust free.
Which of the above statement(s) is/are correct?
A
(i) and (ii)
B
(ii) and (iii)
C
Only (iii)
D
(i) and (iii)
Slide 3 - Quizvraag
What does tarnish means ?
A
lose or cause to lose lustre, especially as a result of exposure to air or moisture.
B
destroy or damage (metal, stone, or other materials) slowly by chemical action.
C
combine chemically with oxygen.
D
Combine with hydrogen.
Slide 4 - Quizvraag
What conditions are required for rusting?
A
dry cold conditions
B
hot damp conditions
C
dry hot conditions
D
Only damp condition
Slide 5 - Quizvraag
Galvanization is a process used to prevent the rusting of ______________. It is to coat ___________ on it.
A
Iron, Zinc
B
Zinc, iron
C
Aluminium, iron
D
Copper, zinc
Slide 6 - Quizvraag
Which of the following is a chemical change?
A
Germination of seeds
B
Rusting of iron
C
blowing a balloon
D
Both (a) and (c)
Slide 7 - Quizvraag
An iron nail is taken to the moon. Another nail is kept near gateway of India in Mumbai, while the third nail is kept near the Red Fort in Delhi. Which nail will rust faster. Why?
Slide 8 - Open vraag
Do you think this bridge
in the picture needs
to be painted? Why?
in the picture needs
to be painted? Why?
