AIEEE 2005 | Structure of Atom Question 208 | Chemistry

Pick out the isoelectronic structure from the following :

$$\eqalign{ & \left( i \right)\,\,\,\,\,\,C{H_3}^ + \cr & \left( {ii} \right)\,\,\,\,{H_3}{O^ + } \cr & \left( {iii} \right)\,\,\,N{H_3} \cr & \left( {iv} \right)\,\,\,\,C{H_3}^ - \cr} $$

$$(i)$$ and $$(ii)$$

$$(iii)$$ and $$(iv)$$

$$(i)$$ and $$(iii)$$

$$(ii), (iii)$$ and $$(iv)$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields?
(A) n = 1, l = 0, m = 0
(B) n = 2, l = 0, m = 0
(C) n = 2, l = 1, m = 1
(D) n = 3, l = 2, m = 1
(E) n = 3, l = 2, m = 0

(D) and (E)

(B) and (C)

(A) and (B)

AIEEE 2005

MCQ (Single Correct Answer)

-1

Of the following sets which one does NOT contain isoelectronic species?

$$BO_3^{3 - }$$, $$CO_3^{2 - }$$, $$NO_3^{- }$$

$$SO_3^{2 - }$$, $$CO_3^{2 - }$$, $$NO_3^{-}$$

$$CN^{- }$$, $$N_2$$, $$C_2^{2 - }$$

$$PO_4^{3 - }$$, $$SO_4^{2 - }$$, $$ClO_4^{ - }$$

AIEEE 2004