Advertisements
Advertisements
प्रश्न
Write the molecular formulae of the following compound.
Fluorspar
Advertisements
उत्तर
Fluorspar- CaF2
APPEARS IN
संबंधित प्रश्न
Define the Ore.
The non-metal present in steel is ______.
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.
Define the term gangue.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
What iron compound is present in haematite ore? Also write its chemical formula.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Name the metal which is extracted from haematite ore.
Name the electrode at which aluminium metal is produced.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
State three objectives achieved during the roasting of ores.
An element has its electron configuration as 2,8,8,2. Now answer the following questions.
a) What is the atomic number of this element?
b) What is the group of this element?
c) To which period does this element belong?
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Which one of the following is not true of metal :
Metals are malleable and ductile
Extraction of moderately reactive elements is done by _______ and _______ method.
Explain the concept of Roasting.
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?
In extraction of copper, the flux used is ____________.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
