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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 hydrogen gas are formed.
Can’t say
Sodium aluminate and water gas are formed.
No reaction
2)
Which gas is liberated when aluminium metal reacts with a solution of sodium hydroxide?
Oxygen
No gas evolution
Nitrogen gas
Hydrogen gas
3)
Al2O3 + 2NaOH → …… + H2O
NaAlO2
AlNaO2
Na2O
Al(OH)3
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)?
Sulphuric acid
Nitric Acid
All of these
HCl
5)
The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is
Aluminium
Iron
Sodium
Copper
6)
Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?
Copper
Magnesium
Aluminium
Iron
7)
What is formed when zinc reacts with sodium hydroxide?
Sodium zincate and water
Sodium zinc-oxide and hydrogen gas
Sodium zincate and hydrogen gas
Zinc hydroxide and sodium
8)
What are amphoteric metals?
Metal that reacts with both acid and base
Metal that does not react with Base and Acid
Metal that reacts with Base and Not with Acid
Metal that reacts with Acid and Not with Base
9)
Which of the following metals is not amphoteric in nature?
Zinc
Lead
Copper
Aluminium
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