EASY
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Write the general outer electronic configuration of group 15 elements.

Important Questions on Elements of Group 13,14 and 15

MEDIUM
An allotrope of carbon which exhibits only two types of C-C bond distance of 143.5 pm and 138.3 pm, is
EASY
The first ionisation energies (in kJmol-1) of four consecutive elements of the second period are given in the options. The first ionisation energy of nitrogen is
MEDIUM
Which among the group -15 elements does NOT exist as tetra atomic molecule?
MEDIUM
Due to - bonding interactions, nitrogen for N2 but phosphorus forms and does not form a diatomic molecule.
MEDIUM
(a) N2 is known whereas P2 is not known. Why?
(b) Bleaching of flowers by chlorine is permanent while that by sulphur dioxide is temporary. Explain.
EASY

With respect to group 15 elements, answer the following :

Comment on the trend in ionisation enthalpy giving reason.

EASY
An element X belongs to 4th  period  and 15th  group of the periodic table. Which one of the following is true regarding order electronic configuration of X. It has
EASY
Name the elements of group 15. What is their valence shell electronic configuration?
HARD
Which of the following statements is incorrect for the group 15th elements?
MEDIUM
Among the members of the group 15 (N, P, As, Sb and Bi), which of the following properties show an increase as we go down from nitrogen to bismuth:
MEDIUM
Which of the following is the increasing order of enthalpy of vaporisation?
MEDIUM
There is considerable increase in covalent radius from N to P. However, from Sb to Bi only small increase (of 7 pm) in covalent radius is observed. This is due to: