EASY
NDA & NA EE
IMPORTANT
Earn 100

Anomalous behaviour of nitrogen is due to
(a)small size and high electronegativity.
(b)non-availability of -orbital in valence shell.
(c)ease of multiple bond formation.
(d)All of the above are correct.

20% studentsanswered this correctly

Important Questions on Periodic Classification of Elements
EASY
NDA & NA EE
IMPORTANT
Ionic radii of zirconium and hafnium become almost identical because

MEDIUM
NDA & NA EE
IMPORTANT
Which of the following statements concerning ionisation energy is not correct?

HARD
NDA & NA EE
IMPORTANT
All the elements in a group (family) have a common valency. For example, all the elements of the carbon family (carbon, silicon, germanium, tin and lead) have the common valency four. However, some of these elements can also have a valency two. Which of the following have a valency two?

MEDIUM
NDA & NA EE
IMPORTANT
The best and the poorest conductors of heat, respectively, are:

MEDIUM
NDA & NA EE
IMPORTANT
Match List with List and select the correct combination of ions and isoelectronic ions using the codes given below the lists.
List | List | ||
A. | 1. | ||
B. | 2. | ||
C. | 3. | ||
D. | 4. |

HARD
NDA & NA EE
IMPORTANT
Match the properties given in Column with the metals given in Column and choose the correct option from the codes given below.
Column (Property) | Column (Metal) | ||
A. | Element with the highest second ionisation enthalpy | . | |
B. | Element with the highest third ionisation enthalpy | . | |
C. | in is | . | |
D. | Element with the highest heat of atomisation | . |

EASY
NDA & NA EE
IMPORTANT
Which one of the following elements exists in the liquid state at room temperature?

MEDIUM
NDA & NA EE
IMPORTANT
Which among the following is correct regarding and
