Chemistry Hydrocarbon

Excess of isobutene on reaction with Br₂ in presence of light at 125°C gives which one of the following, as the major product?

Which one of the following compounds is not aromatic?

Given below are two statements. One is labeled as Assertion A and, the other is labeled as Reason R.

Assertion A: [6] Annulene, [8] Annulene and cis-[10] Annulene, as respectively aromatic, not-aromatic and aromatics.

Reason R: Planarity is one of the requirements of aromatic systems.                              

In the light of the above statements, choose the correct answer from the options given below:

In the following structures, which one is a having staggered conformation with maximum diheldral angle?

Given below are two statements. One is labeled as Assertion A and, the other is labeled as Reason R.

           Assertion A: [6] Annulene, [8] Annulene and cis-[10] Annulene, as respectively aromatic, not-aromatic and aromatics.

           Reason R: Planarity is one of the requirements of aromatic systems.  

 In the light of the above statements, choose the correct answer from the options given below:

Which of the following is not an example of benzenoid compound?

When neopentyl alcohol is heated with an acid, it slowly converted into an 85:15 mixture of alkenes $\mathrm{A}$ and $\mathrm{B}$ , respectively. What are these alkenes?