Advertisements
Advertisements
प्रश्न
Iron is _______.
पर्याय
more reactive than zinc
more reactive than aluminium
less reactive than copper
less reactive than aluminium
Advertisements
उत्तर
Iron is less reactive than aluminium.
APPEARS IN
संबंधित प्रश्न
Define the Ore.
Write the composition of the alloy called bronze.
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved in the conversion of this concentrated ore into zinc metal.
How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.
Name two metals which are found in nature mainly in the free state (as metallic elements).
Which metal is extracted from bauxite ore?
Calamine ore can be used to extract one of the following metals. This metal is:
(a) copper
(b) mercury
(c) aluminium
(d) zinc
A black metal oxide XO2 is used as a catalyst in the preparation of oxygen gas from potassium chlorate. The oxide XO2 is also used in ordinary dry cells. The metal oxide XO2 cannot be reduced satisfactorily with carbon to form metal X.
(a) Name the metal X.
(b) Name the metal oxide XO2.
(c) Which reducing agent can be used to reduce XO2 to obtain metal X?
(d) Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.
Define the following term.
Gangue
Compare the process of calcination and roasting.
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Which one of the following is not true of metal :
Metals are good conductors of electricity.
Find the odd one out and give its explanation.
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
