Chemistry
Grade-8
Easy
Question
Identify the substance which is used for making the electrodes of dry cells from the below options.
- Coke
- Gas carbon
- Sugar charcoal
- Carbon dioxide
Hint:
A material which won't interfere in the electrochemical reaction is used.
The correct answer is: Gas carbon
The correct option is b)Gas carbon.
The carbon rods in dry batteries do not participate in the electrochemical reactions that take place in the battery to generate the current. However, carbon rods simply allow electron flow.
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Destructive distillation of bones produces _______ along with bone oil and organic compounds.
Destructive distillation of bones produces _______ along with bone oil and organic compounds.
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Which of the allotropic form of carbon is shown in the below picture?
Which of the allotropic form of carbon is shown in the below picture?
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What products (A and B) were obtained during the following chemical reaction?
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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.
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.
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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
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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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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
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