The compound which has one isopropyl group is _________

The number of chain isomers possible in C₅ H_I2 is ____________

Number of structural isomers possible in C₃H₆O are ___________

Principle behind crystallization is __________

What is the method involved in purification of chloroform and aniline?

How many sigma and pi bonds are present in
(i) \({ CH }_{ 3 }-C\equiv N\)
(ii) \({ CH }_{ 3 }=C=N?\)

Structures and IUPAC names of some hydrocarbons are given below. Explain why ,the names given in the parentheses .are incorrect.
(i) 

\(CH_{ 3 }-\underset { \underset { OH }{ | } }{ CH } -{ CH }_{ 2 }-{ CH }_{ 2 }-\underset { \underset { { CH }_{ 3 } }{ | } }{ CH } -\underset { \underset { { CH }_{ 3 } }{ | } }{ CH } -{ CH }_{ 2 }-{ CH }_{ 3 }\)

2,5,6 - trimethyl octane and not
3,4,7 - trim ethyl octane
(ii) \(CH_{ 3 }-{ CH }_{ 2 }-\underset { \underset { { C_{ 2 }H }_{ 3 } }{ | } }{ CH } -{ CH }_{ 2 }-\underset { \underset { { CH }_{ 3 } }{ | } }{ CH } -{ CH }_{ 2 }-{ CH }_{ 3 }\)
3-ethyl-5-methylheptane and not
5-ethyl-3-methylheptane

Generally the trans isomer is more stable than cis isomer. Why?

Define optical isomerism.

Derive the structure of
(i) Pent-s-en-z-ol
(ii) Cyclohex-2-en-I-01

Explain how benzoic acid (or Naphthalene or camphor) purified. (or) Explain how a substance is purified by sublimation.

Suggest and explain the method suitable to purify the organic compounds depending on their boiling points.

Which among the following hybrid orbitals are highly electronegative? sp, sp² , sp³ .

Write about the main responsibility of the functional group in an organic compound.

Draw the structure
(i) l-(cyclo bytyl)-2 (cylopropyl) ethane
(ii) 2-carbamyl cyclobutane-I-carboxylic acid

Describe tautomerism with relevant examples.

How would you estimate the percentage of carbon and hydrogen in an organic compound?

How would you estimate the percentage of sulphur in an organic compound by Carius method?

0.50 g of an organic compound was Kjeldahlished. The ammonia evolved was passed in 50 cm³ of IN H₂S0₄, The residual acid required 60 cm³ of N/2 NaOH solution. Calculate the percentage of nitrogen in the compound.