Question
Which of the following substance/s reacts with steam or oxides of metals?
- Sugar charcoal
- Wood charcoal
- Both (a) and (b)
- Coke
Hint:
They are used to reduce metal oxides to metals.
The correct answer is: Both (a) and (b)
The correct option is c)Both (a) and (b).
Sugar charcoal is obtained from the destructive distillation of sugar cane. Used to extract metals from oxides. Magnesium is obtained from its oxide with the help of sugar charcoal.
Amorphous allotropes of carbon reduce heated metal oxides to metals.
Related Questions to study
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.