Sugar charcoal can also be prepared by the following.

Identify the substance known as Ivory black from the following.

Which of the following substance/s reacts with steam or oxides of metals?

Which of the following forms of carbon occur in nature?

Fuels are those substances which:

State whether the following statements are correct or incorrect.
(i) The amorphous forms of carbon contain 99 % of carbon.
(ii) The process of gradual conversion of vegetable matter into carbon-rich substances is called carbonization.
(iii) Coal tar is used as a smokeless fuel.

Read the following paragraph carefully.
The huge forest grows around 300 million years ago covering most of the portion of the earth. Due to the extreme pressure of the earth and high temperature, and the absence of air, the vegetation dies and forms X . This X is compressed between sediment layers to form Y. Further compression forms Z and W, eventually anthracites are formed.
Identify the compounds W, X, Y and Z in the above paragraph:

Match the statements of Column A with those of Column B.

Which of the substances are not used as a fuel?

The correct option is c)Lignite.
Due to its high volatile content, lignite is more easily converted into gas and liquid petroleum products than high-grade coal. Unfortunately, it has a high moisture content and is prone to spontaneous combustion, which can cause problems during transportation and storage.

The amorphous form of carbon contains the impurities like sulphur, nitrogen, hydrogen and ____

Which of the following products does not contain coal tar as an ingredient in it?

The carbon content in the coke is:

Which of the following form is the most popular variety of coal?

Write the descending order of different forms of coals based on the percentage of carbon present in it.

Identify the correct statement from the following:

Which of the following statements is incorrect?