Practice Pakistan's most useful MCQs for competitive exams

Organic compounds are soluble in ____________________?

• (A)  polar solvent
• (B)  non-polar solvent
• (C)  alkalies
• (D)  water

Answer

Submitted By :Ali Uppal

Compounds having same molecular formula but differ in structural formula are called __________________?

• (A)  polymer
• (B)  monomer
• (C)  isomer
• (D)  allotropes

Answer

Submitted By :Ali Uppal

Chemical properties of first member of homologous series with respect to other members are_________________?

• (A)  same
• (B)  different
• (C)  depends upon number of C atoms
• (D)  depends upon number of H atoms

Answer

Submitted By :Ali Uppal

First organic compound synthesized in laboratory was _________________?

• (A)  tartaric acid
• (B)  ethyl alcohol
• (C)  methanol
• (D)  urea

Answer

Submitted By :Ali Uppal

The first organic compound was synthesized in laboratory by_________________?

• (A)  Wohler
• (B)  Kolbe
• (C)  Berzilius
• (D)  Berthelot

Answer

Submitted By :Ali Uppal

Pentane and 2-methyl butance have the same_______________?

• (A)  Boiling point
• (B)  Melting point
• (C)  Percentage composition
• (D)  Structural formula

Answer

Submitted By :Ali Uppal

Propene can exhibit________________?

• (A)  cis-trans isomerism
• (B)  geometric isomerism
• (C)  both a & b
• (D)  none of the above

Answer

Submitted By :Ali Uppal

Octane number 2 2 4-trimethyl pentane is________________?

• (A)  100
• (B)  90
• (C)  80
• (D)  70

Answer

Submitted By :Ali Uppal

Octane number can be improved by________________?

• (A)  Isomerization
• (B)  Adding (C2H5)4 Pb
• (C)  Adding (CH3)4 Pb
• (D)  All

Answer

Submitted By :Ali Uppal

C5H12 has the number of isomers ___________________?

• (A)  one
• (B)  two
• (C)  three
• (D)  four

Answer

Submitted By :Ali Uppal