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Consider the following oxides
1. Al2O3
2. CaO
3. SiO2
The correct sequence in increasing order of their percentage in an ordinary Portland cement is
1. Al2O3
2. CaO
3. SiO2
The correct sequence in increasing order of their percentage in an ordinary Portland cement is
- a)2, 1, 3
- b)1, 3, 2
- c)3, 1 , 2
- d)1, 2, 3
Correct answer is option 'B'. Can you explain this answer?
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Consider the following oxides1. Al2O32. CaO3. SiO2The correct sequence...
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Consider the following oxides1. Al2O32. CaO3. SiO2The correct sequence...
Explanation:
Ordinary Portland cement (OPC) is the most commonly used type of cement in construction. It is composed of several oxides, including Al2O3, CaO, and SiO2, among others. The question asks for the correct sequence of these oxides in increasing order of their percentage in OPC.
To determine the correct sequence, we need to consider the composition of OPC and the relative percentages of each oxide.
Composition of OPC:
- OPC mainly consists of four primary compounds: tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminate (C3A), and tetracalcium aluminoferrite (C4AF).
- The percentage composition of these compounds can vary, but on average, OPC typically contains approximately 65-75% C3S, 10-20% C2S, 5-10% C3A, and 5-10% C4AF.
Percentage of oxides:
1. Al2O3: This oxide is primarily present in C3A and C4AF compounds. Since OPC contains a relatively smaller percentage of C3A and C4AF compared to C3S and C2S, the percentage of Al2O3 is generally lower than the other oxides.
2. CaO: This oxide is present in all four primary compounds of OPC. However, it is relatively higher in C3S and C2S, which are the major compounds in OPC. Therefore, the percentage of CaO is higher than Al2O3 but lower than SiO2.
3. SiO2: This oxide is mainly present in C3S and C2S compounds. OPC contains a higher percentage of C3S and C2S compared to C3A and C4AF, making SiO2 the most abundant oxide in OPC.
Correct sequence:
Based on the above information, the correct sequence in increasing order of their percentage in OPC is:
1. Al2O3: The lowest percentage as it is primarily present in the minor compounds C3A and C4AF.
2. CaO: A higher percentage than Al2O3 but lower than SiO2, as it is present in all four primary compounds.
3. SiO2: The highest percentage as it is mainly present in the major compounds C3S and C2S.
Therefore, the correct sequence is option 'B': 1, 3, 2.
Ordinary Portland cement (OPC) is the most commonly used type of cement in construction. It is composed of several oxides, including Al2O3, CaO, and SiO2, among others. The question asks for the correct sequence of these oxides in increasing order of their percentage in OPC.
To determine the correct sequence, we need to consider the composition of OPC and the relative percentages of each oxide.
Composition of OPC:
- OPC mainly consists of four primary compounds: tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminate (C3A), and tetracalcium aluminoferrite (C4AF).
- The percentage composition of these compounds can vary, but on average, OPC typically contains approximately 65-75% C3S, 10-20% C2S, 5-10% C3A, and 5-10% C4AF.
Percentage of oxides:
1. Al2O3: This oxide is primarily present in C3A and C4AF compounds. Since OPC contains a relatively smaller percentage of C3A and C4AF compared to C3S and C2S, the percentage of Al2O3 is generally lower than the other oxides.
2. CaO: This oxide is present in all four primary compounds of OPC. However, it is relatively higher in C3S and C2S, which are the major compounds in OPC. Therefore, the percentage of CaO is higher than Al2O3 but lower than SiO2.
3. SiO2: This oxide is mainly present in C3S and C2S compounds. OPC contains a higher percentage of C3S and C2S compared to C3A and C4AF, making SiO2 the most abundant oxide in OPC.
Correct sequence:
Based on the above information, the correct sequence in increasing order of their percentage in OPC is:
1. Al2O3: The lowest percentage as it is primarily present in the minor compounds C3A and C4AF.
2. CaO: A higher percentage than Al2O3 but lower than SiO2, as it is present in all four primary compounds.
3. SiO2: The highest percentage as it is mainly present in the major compounds C3S and C2S.
Therefore, the correct sequence is option 'B': 1, 3, 2.
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Consider the following oxides1. Al2O32. CaO3. SiO2The correct sequence...
Option B
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Consider the following oxides1. Al2O32. CaO3. SiO2The correct sequence in increasing order of their percentage in an ordinary Portland cement isa)2, 1, 3b)1, 3, 2c)3, 1 , 2d)1, 2, 3Correct answer is option 'B'. Can you explain this answer?
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