Advertisements
Advertisements
Question
Show the formation of Na2O by the transfer of electrons.
Advertisements
Solution
APPEARS IN
RELATED QUESTIONS
Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
Write the chemical reaction when iron reacts with dilute H2SO4.
The solution of Aluminium sulphate in water is .....................
(a) Green
(b) Colourless
(c) Pink
(d) Blue
Name two metals which form amphoteric oxides.
Write equation for the reaction of magnesium with oxygen.
Which of the following elements would yield a basic oxide.
Na, S, C, K, H
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
Why does aluminium not react with water under ordinary conditions?
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
Name one metal which displaces silver from silver nitrate solution and one which does not.
Which non-metal has been placed in the reactivity series of metals?
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag
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.
Which of the following reactions will not occur? Why not?
(a) MgSO4 (aq) + Cu (s) → CuSO4 (aq) + Mg (s)
(b) CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)
(c) MgSO4 (aq) + Fe (s) → FeSO4 (aq) + Mg (s)
Where does the metal aluminium, used in the thermit process, occurs in the reactivity series of metals?
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
Why is acidified water considered to be a good conductor of electricity?
