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Reactions of NaOH with Aluminium Metal and HCl
Reactions of NaOH with Aluminium Metal and HCl
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1)
When sodium hydroxide reacts with aluminium metal:
Sodium aluminate and water gas are formed.
Sodium aluminate and hydrogen gas are formed.
No reaction
Can’t say
2)
Which gas is liberated when aluminium metal reacts with a solution of sodium hydroxide?
Hydrogen gas
Oxygen
No gas evolution
Nitrogen gas
3)
Al2O3 + 2NaOH → …… + H2O
AlNaO2
NaAlO2
Al(OH)3
Na2O
4)
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas when reacting with metals (except Mn and Mg)?
HCl
Sulphuric acid
All of these
Nitric Acid
5)
The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is
Aluminium
Copper
Sodium
Iron
6)
Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?
Iron
Copper
Magnesium
Aluminium
7)
What is formed when zinc reacts with sodium hydroxide?
Sodium zincate and water
Sodium zincate and hydrogen gas
Sodium zinc-oxide and hydrogen gas
Zinc hydroxide and sodium
8)
What are amphoteric metals?
Metal that reacts with Base and Not with Acid
Metal that reacts with Acid and Not with Base
Metal that reacts with both acid and base
Metal that does not react with Base and Acid
9)
Which of the following metals is not amphoteric in nature?
Zinc
Aluminium
Lead
Copper
10)
A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify black coloured product is:
FeO
CuO
ZnO
MgO