Advertisements
Advertisements
प्रश्न
Explain the reactions of nonmetals with water with the help of examples.
Advertisements
उत्तर
Generally, nonmetals do not react with water, except halogens.
E.g. Chlorine on dissolving in water gives the following reaction:
\[\ce{\underset{\text{Chlorine}}{Cl_{2(g)}} + \underset{\text{Water}}{H2O_{(l)}} -> \underset{\text{acid}}{\underset{\text{Hypochlorous}}{HOCl_{(aq)}}} + \underset{\text{acid}}{\underset{\text{Hydrochloric}}{HCl_{(aq)}}}}\]
APPEARS IN
संबंधित प्रश्न
Which of the following pairs will give displacement reactions?
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset, but after a futile argument, the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
Name the following:
The property possessed by metals by which they can be beaten into sheets.
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Name two metals which are highly resistant to corrosion.
Name one metal which is extracted by:
Reduction with heat alone.
Which metal is extracted from bauxite ore?
The metal which is always present in an amalgam is ______.
Give the chemical formula of :
Cryolite
Compare the process of calcination and roasting.
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
Which one of the following is not true of metal :
Metals are good conductors of electricity.
Which one of the following is not true of metal :
Metals are malleable and ductile
Froth floatation process is generally used to concentrate ______ ores.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
Aluminium oxide is _______ oxide.
The poorest conductor of heat among metals is ____________.
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
During extraction of metals, electolytic refining is used to obtain pure metals.
(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
(c) In this electrolytic cell, where do we get pure silver after passing electric current?
