Write IUPAC name of the complex K₃[Cr(C₂O₄)₃].

OR

Using IUPAC norms write the formula of Hexaamminecobalt(III) sulphate.

a. Predict the main product of the following reactions :

i.

ii.

iii.

b. Give a simple chemical test to distinguish between

c. Why is alpha (α) hydrogen of carbonyl compounds acidic in nature?

OR

a. Write the main product formed when propanal reacts with the following reagents :

i. 2 moles of CH₃OH in presence of dry HCl

ii. Dilute NaOH

iii. H₂N – NH₂ followed by heating with KOH in ethylene glycol

b. Arrange the following compounds in increasing order of their property as indicated :

i. F - CH₂COOH, O₂N - CH₂COOH, CH₃COOH, HCOOH - acid character

ii. Acetone, Acetaldehyde, Benzaldehyde, Acetophenone - reactivity towards addition of HCN

a. Account for the following :

i. Manganese shows maximum number of oxidation states in 3d series.

ii. E^o value for Mn³+/Mn²+ couple is much more positive than that for Cr³+/Cr²⁺.

iii. Ti⁴⁺ is colourless whereas V⁴⁺ is coloured in an aqueous solution.

b. Write the chemical equations for the preparation of KMnO₄ from MnO₂. Why does purple colour of acidified permanganate solution decolourise when it oxidises Fe²⁺ to Fe³⁺?

OR

a. Write one difference between transition elements and p-block elements with reference to variability of oxidation states.

b. Why do transition metals exhibit higher enthalpies of atomization?

c. Name an element of lanthanoid series which is well known to shown +4 oxidation state. Is it a strong oxidising agent or reducing agent?

d. What is lanthanoid contraction? Write its one consequence.

e. Write the ionic equation showing the oxidation of Fe(II) salt by acidified dichromate solution.

Why is CH₂=CH-CH₂-Cl more easily hydrolysed than CH₃CH₂CH₂Cl?

Arrange the following in increasing order of their boiling point:

CH₃CH₂OH, CH₃CHO, CH₃-O-CH₃