Practice Pakistan's most useful MCQs for competitive exams

How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?

• (A)  Two
• (B)  Three
• (C)  Four
• (D)  Six

Answer

Submitted By :Ali Uppal

Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in________________?

• (A)  The presence of Oxygen
• (B)  The presence of Hydrogen
• (C)  The absence of Oxygen
• (D)  The presence of excessive Oxygen

Answer

Submitted By :Ali Uppal

When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?

• (A)  Bromine
• (B)  Chlorine
• (C)  Fluorine
• (D)  Iodine

Answer

Submitted By :Ali Uppal

How many electrons are there in benzene to form delocalized electron cloud________________?

• (A)  3
• (B)  4
• (C)  6
• (D)  8

Answer

Submitted By :Ali Uppal

Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?

• (A)  Two
• (B)  Three
• (C)  Four
• (D)  Five

Answer

Submitted By :Ali Uppal

Addition of 2% gypsum in cement________________?

• (A)  Triggers hydration
• (B)  Triggers hydrolysis
• (C)  Prevents rapid hardening
• (D)  all of the above

Answer

Submitted By :Ali Uppal

Which one can form complex ?

• (A)  Na
• (B)  Cr
• (C)  Li
• (D)  K

Answer

Submitted By :Ali Uppal

Aniline is a derivative of benzene which contains__________________?

• (A)  Imino group
• (B)  Amino group
• (C)  Amide group
• (D)  Nitro group

Answer

Submitted By :Ali Uppal

In benzene sulphonic acid the sulphonic group is attached with benzene ring through ___________________?

• (A)  Hydrogen
• (B)  Oxygen
• (C)  Sulphur
• (D)  OH

Answer

Submitted By :Ali Uppal

The hydrolysis of Benzenetrizonide will yield three moles of____________________?

• (A)  Glyoxime
• (B)  Benzaldehyde
• (C)  Glycol
• (D)  Glyoxal

Answer

Submitted By :Ali Uppal