GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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CBr4
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H2S
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NH3
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NO2
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Detailed explanation-1: -Solution: Hydrogen bonding occur when hydrogen bonded with all these three elements i.e. N, O or F. Explanation: Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom.
Detailed explanation-2: -The electronegativity of N, O and F is much higher than the electronegativity of H. Hence, NH3, H2O and HF forms hydrogen bonds. F is most electronegative and the magnitude of negative charge on F and positive charge on H is highest and thus, the H bonding is strongest in HF.
Detailed explanation-3: -The high boiling points of water, hydrogen fluoride (HF) and ammonia (NH3) is an effect of the extensive hydrogen bonding between the molecules. The London dispersion force is caused by random and temporary changes in the polarity of atoms, caused by the location of the electrons in the atoms’ orbitals.
Detailed explanation-4: -On this basis, among the given species, only HCOOH can form hydrogen bond with water.