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प्रश्न
Mercury, silver, gold are highly reactive metals.
विकल्प
Right
Wrong
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उत्तर
Mercury, silver, gold are highly reactive metals- Wrong
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संबंधित प्रश्न
The process by which sulphide ore is concentrated.
Give two uses of bronze.
Explain givem equation, what happens when a mixture of Cu2O and Cu2S is heated?
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
(a) Al2O3 + Fe
(b) MnO2 + Al
(c) Fe2O3 + Al
(d) Cu2O + Fe
Aluminum is used in thermite welding:
what is thermit?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Why is powdered coke sprinkled on top of the electrolyte?
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
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 _________
Name the methods by which concentrated ore is converted to metallic oxide.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Zinc blende is converted to oxide by ______ process.
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.
Write the name.
The process of extraction of aluminium from alumina-
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
Explain in brief types of extraction of less reactive metals according to their reactivity.
In extraction of copper, the flux used is ____________.
