Question
The substance which is present in the highest amount in the ivory black is
- Carbon
- Hydrogen
- Calcium chloride
- Calcium phosphate
Hint:
Other name of ivory black is bone charcoal.
The correct answer is: Calcium phosphate
The correct option is d)Calcium phosphate.
It contains about 10% carbon, 6 % calcium carbonate 84% and calcium phosphate . It is made from charred bones and pieces of ivory. It has been used since prehistoric times and is still in use today. Ivory black is therefore the least pure form of the carbon blacks and contains high levels of calcium phosphate.
Related Questions to study
Which of the following substance contain almost 99% of carbon?
Which of the following substance contain almost 99% of carbon?
Sugar charcoal can also be prepared by the following.
The correct option is d)By dehydration of cane sugar.
Sugar charcoal is made by destructive distillation of sugar cane sugar. It is also made by dehydrating sugar in the presence of concentrated sulfuric acid. Sulfuric acid is a dehydrating agent, so it absorbs water from the sugar, leaving behind a black carbon residue.
Sugar charcoal can also be prepared by the following.
The correct option is d)By dehydration of cane sugar.
Sugar charcoal is made by destructive distillation of sugar cane sugar. It is also made by dehydrating sugar in the presence of concentrated sulfuric acid. Sulfuric acid is a dehydrating agent, so it absorbs water from the sugar, leaving behind a black carbon residue.
Identify the substance known as Ivory black from 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 substance/s reacts with steam or oxides of metals?
Which of the following forms of carbon occur in nature?
Which of the following forms of carbon occur in nature?
Fuels are those substances which:
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.
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:
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.
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.
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.
