Limitations of Valence Bond Theory

Q. IUPAC official names of elements with atomic number 102 and 107 respectively are:

1. Lawrencium and Nobelium
2. Mendelevium and Nobelium
3. Nobelium and Bohrium
4. Mendelevium and Lawrencium

Q.

Potassium (at No. 19) and chlorine (at No. 17) form a compound. Explain the formation of the compound on the basis of :

(i) oxidation

(ii) reduction

(iii) oxidising agent

(iv) reducing agent

Q. Identify the incorrect match.

Name	IUPAC official name
(A) Unnilunium	(i) Mendelevium
(B) Unniltrium	(ii) Lawrencium
(C) Unnilhexium	(iii) Seaborgium
(D) Unununnium	(iv) Darmstadtium

1. $B-\left(ii\right)$
2. $C-\left(iii\right)$
3. $D-\left(iv\right)$
4. $A-\left(i\right)$

Q. With reference to valence Bond Theory in coordination compounds which of the following statement is/are correct?
I. VBT does not explain the colour exhibits by coordination compounds.
II. VBT explains and gives a quantitative interpretation of magnetic data.
III. VBT does not distinguish between weak field ligand and strong field ligand.

1. I, II, III
2. I, II
3. II, III
4. I, III

Q. What will be the IUPAC nomenclature of the element placed just below the element $At$.
Atomic number of At = 85

1. Ununhexium
2. Ununennium
3. Ununseptium
4. Ununoctium

Q. The element $119$ has not been discovered. What would be the symbol for this element?

1. None of these
2. UUE
3. UUe
4. Uue

Q. What would be the IUPAC name and the symbol for an element having atomic number 120?

1. Unniloctium; Uno
2. Unbioctium; Ubo
3. Ununbium; Uub
4. Unbinilium; Ubn

Q. With reference to valence Bond Theory in coordination compounds which of the following statement is/are correct?
I. VBT does not explain the colour exhibits by coordination compounds.
II. VBT explains and gives a quantitative interpretation of magnetic data.
III. VBT does not distinguish between weak field ligand and strong field ligand.

1. I, II, III
2. I, II
3. I, III
4. II, III

Q.

Valence bond theory helps to know about:

1. Shape of molecule

2. Magnetic behaviour of molecule

3. Colour of the compound

4. None of these

Q. IUPAC official name of element having atomic number 102 is:

1. Nobelium
2. Mendelevium
3. Bohrium
4. Rutherfordium

Q. The correct statements among I to III are:
(I) Valence bond theory cannot explain the color exhibited by transition metal complexes.
(II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes.
(III) Valence bond theory cannot distinguish ligands as weak and strong field ones.

1. (I) and (II) only
2. (I), (II) and (III)
3. (I) and (III) only
4. (II) and (III) only

Q. The $IUPAC$ symbol for the element with atomic number $119$ would be:

1. Uun
2. Unh
3. Une
4. Uue

Q.

1. True
2. False

Q. What is the symbol of an element with the atomic number 120?

1. Bbn
2. Unn
3. Uuo
4. Ubn

Q.

Explain the following giving an appropriate reason in each case.

(i) $O_2$ and $F_2$ both stabilize higher oxidation states of metals but $O_2$ exceeds $F_2$ in doing so.

(ii) Structures of Xenon fluorides cannot be explained by Valence Bond approach.