Define the following terms with a suitable example of each :

a. Anomers

b. Essential amino acids

c. Denaturation of protein

What happens when

a. Salicylic acid is treated with (CH₃CO)₂ O/H⁺?

b. Phenol is oxidised with Na₂Cr₂O₇/H⁺?

c. Anisole is treated with CH₃Cl/anhydrous AlCl₃?
Write chemical equation in support of your answer.

a. Give one chemical test as an evidence to show that [Co(NH₃)₅CI]SO₄ and [Co(NH₃)₅(SO₄)]CI are ionisation isomers.

b. [NiCL₄]^2- is paramagnetic while [Ni(CO)₄] is diamagnetic though both are tetrahedral. Why? (Atomic no. of Ni = 28)

c. Write the electronic configuration of Fe(III) on the basis of crystal field theory when it forms an octahedral complex in the presence of

i. strong field ligand, and

ii. weak field ligand.
(Atomic no. of Fe = 26)

a. Define order of reaction. How does order of a reaction differ from molecularity for a complex reaction?

b. A first order reaction is 50% complete in 25 minutes. Calculate the time for 80% completion of the reaction.

OR

a. The decomposition of a hydrocarbon has value of rate constant as 2.5 × 10⁴ s^-1 at 27^oC. At what temperature would rate constant be7.5 × 10⁴ s^-1 if energy of activation is 19.147 × 10³ J mol^-1?

b. Write a condition under which a bimolecular reaction is kinetically first order. Give an example of such a reaction.
(Given: log 2 = 0.3010, log 3 = 0.4771, log 5 = 0.6990)

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