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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
Why does aluminium not corrode right through?
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
The metal which can be extracted from the bauxite ore is ______.
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
During galvanisation, iron metal is given a thin coating of one of the following metals. This metal is:
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
Give reasons, why aluminum is used in:
wrapping chocolates
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
Name the following:
Two metals which are found in the free or native state.
Define the term:
Flux
Name : The metal which is liquid at room temperature.
How many valence electrons are present in non- metals?
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Find the odd one out and give its explanation.
Write the name.
The molecular formula of main ore of aluminium -
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Explain the reactions of nonmetals with water with the help of examples.
Care must be taken while diluting concentrated nitric acid with water. Why?
