Advertisements
Advertisements
प्रश्न
Give appropriate scientific reasons for Zinc oxide can be reduced to zinc metal by using
carbon, but aluminium oxide cannot be reduced by a reducing agent
Advertisements
उत्तर
The metals in the middle of the activity series like zinc are moderately reactive, and carbon is a good reducing agent because of which zinc oxide gets easily reduced by carbon. Oxides of highly active metals like aluminium have the great affinity towards oxygen and so cannot be reduced by carbon
APPEARS IN
संबंधित प्रश्न
How is the following metallic oxide reduced? Write the equation:
Zinc oxide
Give equation for the following conversion: Aluminium hydroxide to aluminium oxide.
For the reaction of a metal oxide. Suggest a reducing agent other than carbon
Name a non-metallic element which is a liquid at ordinary temperatures
Name the following :
A metal oxide that can be reduced by hydrogen
Answer the following question with respect by hydrogen :
Explain why powdered coke is sprinkled over than electrolytic mixture.
Complete the following by selecting the correct option from the choices given :
The diavalent metal whose oxide is reduced to metal by electrolysis of its fused salt is ________
- A to F below relate to the source and extraction of either zinc or aluminium:
- Bauxite
- Coke
- Cryolite
- Froth floatation
- Sodium hydroxide solution
- Zinc blende
- Write down the three letters each from the above list which are relevant to
- Zinc
- Aluminium
- Fill in the blanks using the most appropriate words from A to F.
- The ore from which aluminium is extracted must first be treated with ………………. so that pure aluminium oxide can be obtained.
- Pure aluminium oxide is dissolved in ….. to make a conducting solution.
iii. Write the formula of cryolite.
Give the equations for the reduction of copper oxide.
Give the equation for the reduction of Iron (III) oxide.
