Advertisements
Advertisements
प्रश्न
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
उत्तर
Zinc oxide is reduced to zinc by heating it with carbon.
\[\ce{\underset{\text{Zinc oxide}}{ZnO_{(s)}} + \underset{\text{Carbon}}{C_{(s)}} ->[Heat] \underset{\text{Zinc}}{Zn_{(s)}} + \underset{\text{Carbon monoxide}}{CO↑}}\]
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word:
The non-metal present in steel is ............
Name the method by which aluminium metal is extracted.
Name three other metals which are extracted in a manner similar to sodium.
Which of the following is an ore of mercury metal?
(a) rock salt
(b) cinnabar
(c) calamine
(d) haematite
Zinc blende ore can be converted into zinc oxide by the process of:
(a) roasting
(b) hydrogenation
(c) chlorination
(d) calcination
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Give the chemical formula of :
Bauxite
What is meant by concentration of ores?
Which method of refining is used to get 99.8% pure aluminium?
Choose the correct answer from the options given below:
The metal is a liquid at room temperature.
Name the following:
A steel grey coloured solid non-metal.
Define roasting.
Extraction of moderately reactive elements is done by _______ and _______ method.
Write the name.
Metals which are amphoteric in nature.
Explain the concept of Calcination.
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?
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
During extraction of metals, electolytic refining is used to obtain pure metals.
(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
(c) In this electrolytic cell, where do we get pure silver after passing electric current?
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give the reason why the above reaction is known as a thermite reaction.
