Carbon & Its Forms

Which one of the following elements forms the maximum number of compounds?

Thermodynamically the most stable form of carbon is :

Which of the following is made up of Carbon only?

Graphene is

Which one of the following materials is strongest?

Which of these is not an additional form of Carbon?

Which of the following is a fundamental element :

Which of the following is a naturally occurring hardest substance on the Earth?

Pencil lead is :

Third allotrope of Carbon was discovered by three scientists, who were awarded the Nobel Prize for Chemistry. Find out who was not on that team-

Buckminsterfullerene is -

Which one of the following pairs is not correctly matched?

Which one of the following pairs is incorrectly matched?

Which one of the following pairs is not correctly matched?

Arrange the following substances in chronological order of their first synthesis in lab : 1. Black gold 2. Fullerene 3. Graphene 4. Kevlar Select correct answer from the codes given below : Codes :

Which of the following do not contain carbon?

Which of these consists carbon?

The highest amount of Carbon is in -

For the sale of diamonds, the unit of weight is carat. One carat is equal to –

Consider the following statements and select the correct answer from the codes given below - (1) Water becomes harder due to the presence of Calcium Sulphate and it is not usable. (2) Diamond is harder than copper and iron. (3) Oxygen is the main component of air. (4) Nitrogen is used in the manufacture of vegetable ghee. Code :

Which one of the following is called ‘dry ice’?