The transition from J-0 to J'=1 for HCI takes place at v 21.18 cm^-1. Calculate  the bond length for ¹H³⁵Cl.

Derive the expression

What is aci form of nitroethane? Discuss. 

Write the symmetry elements and the point groups of the following:

(i) Water (ii) Ammonia (iii) Benzene

Why do nitro compounds dissolve in sodium hydroxide? 

Discuss various methods of reduction of esters giving the products formed.

Write chemical reactions for the following:

(i) Kolbe Schmidt reaction

(ii) Strecker synthesis

(iii) Dzeckmann cobndensation

(iv) Knoevenagel reaction

(v) Perkin condensation 

Explain Hell-Vollhard-Zelinski reaction. Also illustrate its synthetic importance.

Derive the symbol for the ground state of hydrogen atom.

What is Rydberg constant? Calculate its value. Why is its experimental value different from the calculated value? 

Write the mechanism for the haloform reaction.

Suggest the reaction that can best be used to prepare following ethers by Williamson ether synthesis

(a) CH₃CH_2^- O^- CH= CH₂

_(b) 

Retrosynthesis

Write the chemical equation for following named reactions:

a) Reimer-Tiemann reaction

b) Kolbe reaction

c) Claisen reaction

d) Knoevenagel reaction

e) Willgerodt reaction

Condensation polymers

Antibiotics

Auxochromes

Cleaning action of soaps

Describe reaction types used to construct a carbon skeleton with suitable examples. 

Taking suitable examples, explain the role of sensitisers in photo-reactions.