What is the total number of sigma and pi bonds in the following molecules?
(a) C2H2 (b) C2H4
(a) C2H2
H – C ≡ C – H
Number of sigma bonds = 3
Number of 
bonds = 2
Number of sigma bonds = 5
Number of 
bonds = 1
Why two helium atoms do not combine to form He2?
What are 'Lewis structures'?
Name the conditions for the formation of an ionic bond between two atoms.
What is crystal lattice?
What is electrovalency?
What bond is present in MgCl2 molecules?
Two elements A and B have the electronic configuration as:
A = 1s22s22p63s2 and B = 1s22s22p5
Write the empirical formula of the substance containing A and B.
What type of bonding would you expect between:
(i) a metal and a non-metal
(ii) a non-metal and another non-metal?
Mock Test Series
