Chemistry
Grade-8
Easy
Question
What is the compound A in the following chemical reaction?
-
-
- NaOH
-
Hint:
SiC + 4 NaOH + 2 O2 → Na2SiO3 + Na2CO3 +2 H2O
The correct answer is:
SiC + 4 NaOH + 2 O2 → Na2SiO3 + Na2CO3 +2 H2O
So option A is correct
Related Questions to study
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Which among the following does not produce carbon monoxide?
Which among the following does not produce carbon monoxide?
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Calcium carbonate occurs in nature in the form of:
Calcium carbonate occurs in nature in the form of:
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The compound which is used as a grinding stone to cut and sharpen tools is:
The correct option is c)Silicon carbide.
Silicon carbide, an artificial compound of silicon and carbon with a Mohs hardness of 9.5, is commonly used to cut softer gemstones. It is also used as a grinding stone to cut and even to sharpen tools. Diamond, the hardest natural substance, has a Mohs hardness of 10 and is used as an abrasive for cutting and polishing a variety of materials, including diamond itself.
The compound which is used as a grinding stone to cut and sharpen tools is:
ChemistryGrade-8
The correct option is c)Silicon carbide.
Silicon carbide, an artificial compound of silicon and carbon with a Mohs hardness of 9.5, is commonly used to cut softer gemstones. It is also used as a grinding stone to cut and even to sharpen tools. Diamond, the hardest natural substance, has a Mohs hardness of 10 and is used as an abrasive for cutting and polishing a variety of materials, including diamond itself.
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Carbon dioxide dissolves in water to give___
Carbon dioxide dissolves in water to give___
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Identify the pair of organic compounds from the following?
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Assertion-Reason Type Questions
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Reason (R): It is a non-combustible gas and supports combustion.
Assertion-Reason Type Questions
Assertion (A): CO2 is used in fire extinguishers to put off fires.
Reason (R): It is a non-combustible gas and supports combustion.
ChemistryGrade-8
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In the laboratory preparation of carbon monoxide, hydrochloric acid is only used although sulfuric acid reacts with calcium carbonate in the same way as HCl. However, the sulfuric acid is never used because:
(i). Insoluble calcium sulfate formed during this reaction
(ii). Calcium sulfate covers the marble chips and stops the reaction.
(iii). The reaction is a highly exothermic reaction
(iv). To react both of the reactants, many temperature conditions need to be fulfilled
In the laboratory preparation of carbon monoxide, hydrochloric acid is only used although sulfuric acid reacts with calcium carbonate in the same way as HCl. However, the sulfuric acid is never used because:
(i). Insoluble calcium sulfate formed during this reaction
(ii). Calcium sulfate covers the marble chips and stops the reaction.
(iii). The reaction is a highly exothermic reaction
(iv). To react both of the reactants, many temperature conditions need to be fulfilled
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Match the entries of Column A with those of Column B.
Match the entries of Column A with those of Column B.
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When carbon dioxide reacts with sodium oxides, it gives ____
When carbon dioxide reacts with sodium oxides, it gives ____
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What are the products obtained from the following chemical reaction?
What are the products obtained from the following chemical reaction?
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Which of the following fertilizer is manufactured by using carbon dioxide?
Which of the following fertilizer is manufactured by using carbon dioxide?
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CaCO3 is the chemical formula for
CaCO3 is the chemical formula for
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When liquid CO2 is cooled at –78oC, it changes into snow-white compound called as
When liquid CO2 is cooled at –78oC, it changes into snow-white compound called as
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Which of the carbonates does not decompose to give carbon dioxide?
Which of the carbonates does not decompose to give carbon dioxide?
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Multiple True (T) – False (F) type of Question:
1. Most of the food contain compounds of carbon and oxygen.
2. Carbon monoxide is neither combustible nor a supporter of combustion.
3. Dry ice produces at a very low temperature.
Multiple True (T) – False (F) type of Question:
1. Most of the food contain compounds of carbon and oxygen.
2. Carbon monoxide is neither combustible nor a supporter of combustion.
3. Dry ice produces at a very low temperature.
ChemistryGrade-8
