{"@context":"https://schema.org/","@type":"Quiz","dateCreated":"2022-07-07T09:18:08.083Z","dateModified":"2022-07-07T09:18:08.083Z","typicalAgeRange":"11-18","educationalLevel":"","assesses":"Chemistry - anomalous behaviour of beryllium","educationalAlignment":[{"@type":"AlignmentObject","alignmentType":"educationalTopic","targetName":"anomalous behaviour of beryllium"},{"@type":"AlignmentObject","alignmentType":"educationalSubject","targetName":"Chemistry"},{"@type":"AlignmentObject","alignmentType":"educationalExam","targetName":""}],"name":"Quiz about anomalous behaviour of beryllium","about":{"@type":"Thing","name":"Chemistry - anomalous behaviour of beryllium"},"hasPart":[{"@type":"Question","eduQuestionType":"Multiple choice","learningResourceType":"Practice problem","educationalLevel":"intermediate","name":"Question About anomalous behaviour of beryllium","text":"The average composition of portland cement is}","encodingFormat":"text/markdown","comment":{"@type":"Comment","text":"\"\""},"suggestedAnswer":[{"@type":"Answer","position":0,"encodingFormat":"text/markdown","text":"

$CaO : 40 - 50\\%$, $SiO_2 : 30 - 40\\%$ , $Al_2O_3$, $Fe_2O_3 : 10 - 20\\%$

","comment":{"@type":"Comment","text":"\"\""}},{"@type":"Answer","position":1,"encodingFormat":"text/markdown","text":"

$CaO : 50 - 60\\%$, $SiO_2 : 20 - 25\\%$, $Al_2O_3 : 5 - 10\\%$, $MgO : 2 - 3\\%$, $Fe_2O_3 : 1 - 2\\%$ and $SO_3 : 1 - 2\\%$

","comment":{"@type":"Comment","text":"\"\""}},{"@type":"Answer","position":2,"encodingFormat":"text/markdown","text":"

$SiO_2 : 40 - 50\\%$, $CaO : 30 - 40\\%$, $Al_2O_3 : 10 - 20\\%$

","comment":{"@type":"Comment","text":"\"\""}},{"@type":"Answer","position":3,"encodingFormat":"text/markdown","text":"

$CaO : 50\\%$, $SiO_2 : 50\\%$

","comment":{"@type":"Comment","text":"\"\""}}],"acceptedAnswer":{"@type":"Answer","position":1,"encodingFormat":"text/markdown","text":"

$CaO : 50 - 60\\%$, $SiO_2 : 20 - 25\\%$, $Al_2O_3 : 5 - 10\\%$, $MgO : 2 - 3\\%$, $Fe_2O_3 : 1 - 2\\%$ and $SO_3 : 1 - 2\\%$

","comment":{"@type":"Comment","text":"\"\""},"answerExplanation":{"@type":"comment","text":"Port land cement consists of raw materials mainly compounds of lime mixed with silica and alumina. $CaO \\rightarrow 50-6096$ $SiO _{2} \\rightarrow 20-2596$ $Al _{2} O _{3} \\rightarrow 5-10 \\%$ $F e _{2} O _{3} \\rightarrow 1-29$ $MgO \\rightarrow 2-396$ $SO _{3} \\rightarrow 1-2 \\%$ and few amount of oxides of iron, magnesium and sulphur."}}}]}

The average composition of portland cement is

The Correct Option is B

Solution and Explanation

Concepts Used:

Anomalous Behaviour of Beryllium