Chemistry
Grade-8
Easy
Question
Read the following paragraph carefully.
X is prepared when the wood is heated in a limited air supply. This X is used to increase the absorption capacity of gases by heating them at a very high temperature. The substance obtained by this process is called Y. When this X reacts with the oxide of the metal, it gives the mixture of Z and W. This mixture is also called producer gas.
Identify the compounds X, Y, and Z in the above paragraph.
Hint:
X-It is a type of coal.
Y- it is used to filter water as it can absorb impurities.
Z & W are producer gases.
The correct answer is:
The correct option is c)
Burning wood under a limited supply of oxygen removes the volatiles things contained in the wood and cools it, resulting in the formation of wood tar and wood gas. The black residue left after the reaction is called charcoal. The advantages of using charcoal as fuel over wood are: No smoke is produced when burning charcoal.
Activated charcoal is a good absorbent. It is used in a numerous places as an absorbent like water filtering etc.
When wood charcoal react with metal oxides it produces producer gases carbon monoxide and hydrogen gas.
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The starting material is used to prepare hydrocarbons like methane is
(i) Charcoal
(ii) Hydrogen
(iii) Carbon dioxide
(iv) Carbon monoxide
The starting material is used to prepare hydrocarbons like methane is
(i) Charcoal
(ii) Hydrogen
(iii) Carbon dioxide
(iv) Carbon monoxide
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Bone charcoal is an allotrope of ____________ .
Bone charcoal is an allotrope of ____________ .
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Wood charcoal can be used in
Wood charcoal can be used in
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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
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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.
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Which of the following substance/s reacts with steam or oxides of metals?
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