{"@context":"https://schema.org/","@type":"Quiz","dateCreated":"2026-03-18T12:54:57.813Z","dateModified":"2026-03-18T12:54:57.813Z","typicalAgeRange":"11-18","educationalLevel":"BITSAT","assesses":"Chemistry - properties of dihydrogen","educationalAlignment":[{"@type":"AlignmentObject","alignmentType":"educationalTopic","targetName":"properties of dihydrogen"},{"@type":"AlignmentObject","alignmentType":"educationalSubject","targetName":"Chemistry"},{"@type":"AlignmentObject","alignmentType":"educationalExam","targetName":"BITSAT"}],"name":"Quiz about properties of dihydrogen","about":{"@type":"Thing","name":"Chemistry - properties of dihydrogen"},"hasPart":[{"@type":"Question","eduQuestionType":"Multiple choice","learningResourceType":"Practice problem","educationalLevel":"intermediate","name":"Question About properties of dihydrogen","text":"When a crystal of caustic soda is exposed to air, a liquid layer is deposited because:}","encodingFormat":"text/markdown","comment":{"@type":"Comment","text":"Deliquescent substances form solution on exposure to air."},"suggestedAnswer":[{"@type":"Answer","position":0,"encodingFormat":"text/markdown","text":"

crystal loses water

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

crystal absorbs moisture and CO₂

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

crystal melts

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

crystal sublimes

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

crystal absorbs moisture and CO₂

","comment":{"@type":"Comment","text":"Deliquescent substances form solution on exposure to air."},"answerExplanation":{"@type":"comment","text":"Step 1: Nature of NaOH. Caustic soda is hygroscopic and deliquescent. Step 2: Reaction with air. It absorbs moisture and CO₂ forming solution."}}}]}

When a crystal of caustic soda is exposed to air, a liquid layer is deposited because:

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The Correct Option is B

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