Chemistry
Grade-8
Easy
Question
Wood charcoal can be used in
- Metallurgy
- To prepare water gas
- Making explosives
- All of the above
Hint:
wood charcoal has good absorption capacity. It is an excellent fuel. It is also a good reducing agent.
The correct answer is: All of the above
The correct option is d)All of the above.
Wood charcoal's use as an energy source was essential to the progress of metallurgy. For this reason, charcoal is an excellent fuel for blacksmiths and is still widely used by blacksmiths today. It is also an excellent reducing fuel for iron making, and has been used in this way since Roman times.
Charcoal is used in water purifiers and gas masks due to its high adsorption capacity. It is used as a gas mask that absorbs harmful gases. Being porous, it is used to filter water.
Gunpowder consists of a mixture of sulfur, carbon (wood charcoal) and potassium nitrate (saltpetre). Sulfur and carbon act as fuels and saltpeter is an oxidizer.
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Identify the substance that is a good conductor of electricity from the following.
Identify the substance that is a good conductor of electricity from the following.
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Which product will form on passing sulfur vapor through red hot charcoal?
Which product will form on passing sulfur vapor through red hot charcoal?
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The amorphous allotropy of carbon that contains the least amount of carbon is
The amorphous allotropy of carbon that contains the least amount of carbon is
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Why is the wood charcoal used in the water filters and gas masks?
1. It is a good adsorbent of gases, liquids, and solids.
2. It is a very good reducing agent.
3. It burns at a very low temperature.
4. It is a soft, black, and porous liquid.
Why is the wood charcoal used in the water filters and gas masks?
1. It is a good adsorbent of gases, liquids, and solids.
2. It is a very good reducing agent.
3. It burns at a very low temperature.
4. It is a soft, black, and porous liquid.
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Which of the following compounds is not carbon's amorphous form?
Which of the following compounds is not carbon's amorphous form?
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Which of the following picture does not depict the uses of wood charcoal?
Which of the following picture does not depict the uses of wood charcoal?
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Wood charcoal acts as
Wood charcoal acts as
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The substance which is present in the highest amount in the ivory black is
The substance which is present in the highest amount in the ivory black is
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Which of the following substance contain almost 99% of carbon?
Which of the following substance contain almost 99% of carbon?
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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.
ChemistryGrade-8
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.
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Identify the substance known as Ivory black from the following.
Identify the substance known as Ivory black from the following.
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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?
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Which of the following forms of carbon occur in nature?
Which of the following forms of carbon occur in nature?
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Fuels are those substances which:
Fuels are those substances which:
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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.
ChemistryGrade-8
