41.

Give reasons :
Silicon on doping with Phosphorus forms the n-type semiconductor.

Give reason:
Ferrimagnetic substances show better magnetism than antiferromagnetic
substances.

Write IUPAC name of the following compound :
(CH₃CH₂)₂NCH₃

Write the structure of 1-Bromo-4-chlorobut-2-ene.

Write the equations involved in the following reactions :
Wolff-Kishner reduction

Write the equations involved in the following reactions :
Etard reaction

Following compounds are given to you :
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
(i) Write the compound which is most reactive towards SN2 reaction.
(ii) Write the compound which is optically active.
(iii) Write the compound which is most reactive towards b-elimination reaction.

Write structures of compounds A, B and C in each of the following reactions

Write structures of compounds A, B and C in each of the following reactions

Do the following conversions in not more than two steps :
Benzoic acid to benzaldehyde