Write the Russell-Saunders terms symbols for states with the angular momentum quantum numbers (L,S) (a) , (b) , (c) .(d) 

With suitable illustration explain the super exchange mechanism in d-metal complexes.

Explain the Curie Law and Curie-Weiss Law along with their plots.

Give the octahedral as well as tetrahedral field electronic configuration for Cr³⁺and Co³⁺ ions. Which site will be preferred by these ions, octahedral or tetrahedral? Justify your answer.

If pairing energy P for Fe³⁺ ion is 29,875 cm^-1 and for [Fe (H₂O)₆]³⁺ is 13,700 cm^-1, find out

(i) whether the complex is high spin or low spin

(ii) the number of unpaired electrons

(iii) whether the complex is coloured or not?

Explain the different types of compounds having multiple metal-metal bonds.

What are Wade's Rule? Apply them to any metalloborane.

Give the structures of (a) B₇H^2-₇; (b) B₅H^4-₅

What are the polydentate phosphines? How do you prepare molybdenocene.

With the help of molecular orbital theory explain the geometry of the nitrosyl ligand.

Determine the number and symmetry designations of the infrared-active C-O modes in the following derivatives of Mo(CO)_6-

Mo(CO)₅PR₃

cis-Mo(CO)₄ (PR₃)₂

trans-MO(CO)₄ (PR₃)₂

fac-Mo(CO)₃ (PR3)₃

With suitable examples explain fluxional organometallic compounds. What are the probable of symmetric and semibridging carbonyls. Give suitable examples.

What is ẞ-elimination in organometallic chemistry? What is the role of agnostic alkyls in ẞ-elimination?

Explain the concept of hapticity giving suitable examples.

With suitable illustration explain the theory of Craig and Paddock for a bonding in phosphazenes. Give some synthetic routes for polyphosphazenes.

What are the possible molecular structures of xenon hexafluoride? Explain with suitable figures. Explain the geometrical isomers of Ma₂b₂cd complex with suitable figures.

Explain periodic variation of electronegativity with atomic number for the first six rows of the periodic table.

Give the trends in metallic radii of alkali, alkaline earth and transition metals of fourth, fifth and sixth periods with proper illustration.

Which of the following statements are true? Give reasons for your answer.

(i) F-distribution is always used in goodness of fit.

(ii) Measure of central tendency in a data set refers to the extent to which the observations are scattered.

(iii) A process is said to be under assignable cause when the points are above the VCL link of ( chart. ,R)

(iv) Simple random sampling is done by using random number tables where the probability of drawing a digit is 0⋅ .1

(v) All time series have a trend.

A researcher measures the temperature of a solution 5 times. The observations are 25, 32, 27, 29, 30 °C . Determine an unbiased estimate of the temperature.