Advertisements
Advertisements
प्रश्न
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
Advertisements
उत्तर
When dry aluminium hydroxide is calcined by at 1000 °C, pure aluminium oxide, called alumina is obtained.
\[\ce{\underset{\text{Aluminium hydroxide}}{2Al(OH)_{3(s)}} ->[heat][1000 °C] \underset{\text{Aluminium oxide}}{Al2O_{3(s)}} + \underset{\text{Water vapour}}{3H2O_{(g)}}}\]
APPEARS IN
संबंधित प्रश्न
The process by which sulphide ore is concentrated.
Give two uses of bronze.
Name one metal which is extracted by:
Reduction with aluminium.
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
State three objectives achieved during the roasting of ores.
Give reasons, why aluminum is used in:
In making ships
Name : The metal which is liquid at room temperature.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
_______ is the least reactive metal.
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Find the odd one out and give its explanation.
Write the name.
The process of extraction of aluminium from alumina-
Explain the reactions of nonmetals with water with the help of examples.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain the following reaction with the balanced equation.
Zinc sulphide is heated strongly in excess of air
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?
