Hydrocarbon chain isomerism

Which one of the following is a pair of functional group isomers?

أي من الازواج الاتية يمثل متشاكلات وظيفية

• CH₃COOCH₂CH₃ and CH₃CH₂COOCH₃

• (CH₃)₂CHCH(CH₃)₂ and (CH₃)₃CCH₂CH₃

• CH₃CH₂OCH₃ and (CH₃)₂CHOH

• ClCH₂CH₂CH=CH₂ and CH₃CH=CHCH₂Cl

How many structural isomers, which are aldehydes, have the molecular formula C₅H₁₀O?

• 2

• 3

• 4

• 5

How many structural isomers, which are esters, have the molecular formula C₄H₈O₂?

• 2

• 3

• 4

• 5

Isomers of the ester HCOOCH₂CH₂CH₃, include

(i) ethyl ethanoate

(ii) methyl propanoate

(iii) butanoic acid

(iv) butyl methanoate

• (i), (ii) and (iii) only

• (i) and (iii) only

• (ii) and (iv) only

• (iv) alone

The number of structural isomers of molecular formula C₄H₉Br is

• 5

• 4

• 3

• 2

Which of the following statement is FALSE about optical isomers?

• At least 1 asymmetrical chiral center
• Mirror images of each other
• Non superimposable
• carbon center bonded to 4 groups

اي المركبات الاتية يحتوي ذره كيرالية

• CH₃CH₂CH(CH₃)CI

• CH₂=CH₂

• CH₃CH₂CH₂(OH)

• (CH₃)₂CH(CI)

كم عدد متشاكلات السلسلة الهيدروكربونية للصيغة C₆H₁₂₃

• 3

• 2

• 5

• 5