Advertisements
Advertisements
प्रश्न
What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
Advertisements
उत्तर
Sodium oxide is a basic in nature. Sodium oxide reacts with water to form an alkali called sodium hydroxide.
\[\ce{\underset{(Basic oxide)}{\underset{Sodium oxide}{Na2O_{(s)}}} + \underset{Water}{H2O_{(l)}} -> \underset{(An alkali)}{\underset{Sodium hydroxide}{2NaOH_{(aq)}}}}\]
APPEARS IN
संबंधित प्रश्न
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
What name is given to those metal oxides which show basic as well as acidic behaviour?
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
Name the metal which has been placed at the top of the reactivity series.
Which of the following elements would yield an acidic oxide?
Na, S, C, K, H
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place.
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium
Why is white phosphorus kept immersed under water?
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Write the equation for the reaction of Aluminium with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
Name one metal which displaces copper from copper sulphate solution and one which does not.
Which non-metal has been placed in the reactivity series of metals?
The elements whose oxides can turn litmus solution blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
(d) a neutral oxide
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
(a) Zn
(b) Ag
(c) Cu
(d) Mg
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
(a) What is the nature of the oxide E2O?
(b) State whether element E is a metal or a non-metal.
(c) Give one example of an element like E.
Name a metal which does not react with cold as well as hot water but reacts with steam.
Name a metal which It does not react with any physical state of water?
When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
