Advertisements
Advertisements
प्रश्न
Mercury, silver, gold are highly reactive metals.
पर्याय
Right
Wrong
Advertisements
उत्तर
Mercury, silver, gold are highly reactive metals- Wrong
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
The two metals which are extracted by means of electrolytic reduction of their molten salts are:
(a) magnesium and manganese
(b) iron and aluminium
(c) zinc and magnesium
(d) magnesium and aluminium
Which of the following pair of metals exists in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag
Which of the following metals are extracted by the electrolysis of their molten chlorides?
(a) Na and Hg
(b) Hg and Mg
(c) Na and Mg
(d) Cu and Fe
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
Define the following term.
Mineral
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
Give the chemical formula of :
Sodium aluminate
Name the following:
The substance added to get rid of gangue in the extraction of metal.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
Extraction of moderately reactive elements is done by _______ and _______ method.
Gold and silver are active metals.
Write the molecular formulae of the following compound.
Fluorspar
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
In extraction of copper, the flux used is ____________.
Which of the following ore is concentrated by the Froth floatation process?
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?
