Advertisements
Advertisements
Question
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Advertisements
Solution
In Electrolytic reduction of alumina, Anode : Set of carbon (graphite) rods : : Cathode : Graphite lining
APPEARS IN
RELATED QUESTIONS
Which metal becomes black in the presence of hydrogen sulphide gas in air?
What iron compound is present in haematite ore? Also write its chemical formula.
Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
Give reasons, why aluminum is used in:
making alloys
Define the following term.
Gangue
Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
Name : The metal which is liquid at room temperature.
How many valence electrons are present in non- metals?
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
Which one of the following is not true of metal :
Metals are malleable and ductile
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
Define roasting.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Extraction of moderately reactive elements is done by _______ and _______ method.
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
Explain in brief types of extraction of less reactive metals according to their reactivity.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
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.
