Elemental carbon appears in many structural forms or allotropes . Three of these forms are crystalline -diamond ,graphite and the recently discovered fullerene (bucky ball ) -while more than ` 40` others including coke and carbon black are amorphous . Now there seems to be set as fourth crystalline allotrope of carbon. reported in `1995` by ` Lagow at the University of Texas .
Newly discovered allotrope of carbon has the form :

Options

A. polyyne
B. fullerene
C. bucky ball
D. none of these

Answer

To solve the question regarding the newly discovered allotrope of carbon reported in 1995, we can follow these steps:

### Step 1: Understand the Context
The question mentions that there are various allotropes of carbon, including crystalline forms like diamond, graphite, and fullerene. It also states that a new crystalline allotrope was discovered in 1995.

**Hint:** Familiarize yourself with the different allotropes of carbon and their characteristics.

### Step 2: Identify the Newly Discovered Allotrope
The video transcript indicates that the newly discovered allotrope of carbon is polyene. This allotrope was reported in 1995 by Lagow at the University of Texas.

**Hint:** Research the properties and structure of polyene to understand how it differs from other allotropes.

### Step 3: Understand the Hybridization
The transcript mentions that fullerene (buckyball) has sp² hybridization, while polyene has sp hybridization. This distinction is important as it relates to the bonding and structure of the allotrope.

**Hint:** Review the concepts of hybridization and how it affects the properties of carbon allotropes.

### Step 4: Conclude the Answer
Based on the information provided, the newly discovered allotrope of carbon is polyene.

**Hint:** Make sure to summarize your findings clearly, stating the name of the allotrope and its characteristics.

### Final Answer
The newly discovered allotrope of carbon, reported in 1995, is polyene.