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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?
Aluminium
Iron
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
Calcium
Iron
Silicon
Carbon
3)
The second most abundant metal in the earth’s crust is
Iron
Oxygen
Silicon
Aluminium
4)
Hydrogen gas is produced when Zn and Cu alloy dissolves in dil.HCl. What happens here?
Only zinc reacts with dil. HCl
Only copper reacts with water
Both zinc and copper react with dil. HCl
Only copper reacts with dil. HCl
5)
A greenish coating develops on copper utensils due to formation of
Cu (OH)2.CuCO3
CuO
Cu (OH)2
CuCo3
6)
Rusting of iron takes place in
Ordinary water
None of these
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
Lower end of test tube become slightly warm
A colourless gas with the smell of burning sulphur is observed
Green solution slowly turns brown
Light green solution changes to blue
8)
This change in colour of the dipped portion of the iron nail in copper sulphate solution is because of deposition of
Iron
Aluminium
Sulphur
Copper
9)
This activity shows
Copper is more reactive than iron
Iron is unreactive
Iron is more reactive than copper
Copper is unreactive
10)
What happens when copper rod is dipped in iron Sulphate solution?
Blue colour of copper sulphate solution is obtained
No reaction takes place
Copper displaces iron
Reaction is exothermic