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प्रश्न
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 _________
पर्याय
Al
Cu
Zn
Fe
उत्तर
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is Cu.
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संबंधित प्रश्न
Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
Which metal can be extracted from the following ore?
bauxite
Explain the following:
Galvanization protects iron from rusting.
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 ______.
State three objectives achieved during the roasting of ores.
Explain the following reaction with the balanced equation.
Zinc sulphide is heated strongly in excess of air
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?
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
