Class JEE Mathematics Practice Q #708
KNOWLEDGE BASED
REMEMBER
4 Marks 2022 MCQ MULTI
Which of the following compounds show Hydrogen bonding?
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Correct Answer: A, C
Explanation
Hydrogen bonding occurs when H is bonded to highly electronegative atoms like F, O, or N.

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Step-by-Step Solution

Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom (such as nitrogen, oxygen, or fluorine) and is attracted to another electronegative atom in a different molecule or part of the same molecule. 1. Analyze each compound based on its structure and the presence of highly electronegative atoms bonded to hydrogen: * **Water (H2O):** Oxygen is highly electronegative and bonded to hydrogen. Therefore, water exhibits hydrogen bonding. * **Ammonia (NH3):** Nitrogen is highly electronegative and bonded to hydrogen. Therefore, ammonia exhibits hydrogen bonding. * **Hydrogen Fluoride (HF):** Fluorine is highly electronegative and bonded to hydrogen. Therefore, hydrogen fluoride exhibits hydrogen bonding. * **Methane (CH4):** Carbon is not sufficiently electronegative. Therefore, methane does not exhibit hydrogen bonding.

Correct Answer: Water, Ammonia, Hydrogen Fluoride<\/strong>

|KEY:A,B,C|||

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Pedagogical Audit
Bloom's Analysis: This is an REMEMBER question because it requires recalling the definition and conditions for hydrogen bonding.
Knowledge Dimension: FACTUAL
Justification: The question directly tests the knowledge of which compounds exhibit hydrogen bonding, a factual piece of information.
Syllabus Audit: In the context of JEE, this is classified as KNOWLEDGE. It directly assesses recall of textbook information.

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