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Show that iron is more reactive than copper
Show that iron is more reactive than copper
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1)
Which of the following metals is present in the anode mud during the electrolytic refining of copper?
Iron
Aluminium
Sodium
Gold
2)
An element reacts with oxygen to give a compound with a high melting point. The compound is soluble in water. The element is likely to be
Carbon
Iron
Calcium
Silicon
3)
The second most abundant metal in the earth’s crust is
Silicon
Aluminium
Iron
Oxygen
4)
An alloy of Zn and Cu is dissolved in dil. HCl. Hydrogen gas is evolved. In this evolution of gas
Both zinc and copper react with dil. HCl
Only copper reacts with water
Only copper reacts with dil. HCl
Only zinc reacts with dil. HCl
5)
A greenish coating develops on copper utensils due to formation of
CuO
Cu (OH)2.CuCO3
Cu (OH)2
CuCo3
6)
Rusting of iron takes place in
None of these
Ordinary water
Distilled water
Both ordinary and distilled water
7)
An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that
Light green solution changes to blue.
Green solution slowly turns brown
Lower end of test tube become slightly warm
A colourless gas with the smell of burning sulphur is observed
8)
This change in colour of the dipped portion of the iron nail in copper sulphate solution is because of deposition of
Aluminium
Iron
Sulphur
Copper
9)
This activity shows
Copper is unreactive
Iron is unreactive
Copper is more reactive than iron
Iron is more reactive than copper
10)
What happens when copper rod is dipped in iron Sulphate solution?
Copper displaces iron
Blue colour of copper sulphate solution is obtained
Reaction is exothermic
No reaction takes place