question_answer4) Bond angle in \[N{{H}_{3}}\] is more than in \[P{{H}_{3}}\]. Explain.
question_answer6) Can a non-polar molecule have
polar covalent bonds?
question_answer7) Sigma bond is stronger than the
pi bond. Explain.
question_answer8) A molecule of\[PC{{l}_{5}}\] exists while that of\[NC{{l}_{5}}\] does not.
question_answer9) o-nitrophenol is steam volatile while p-nitrophenol is not. Discuss.
question_answer10) \[KH{{F}_{2}}\] exists while \[KHC{{l}_{2}}\]
does not. Explain.
question_answer12) Boiling point of ethane is more
than that of methane. Assign reason.
question_answer20) Out of \[NaCl\] and \[MgO\],
which has higher lattice energy and why?
question_answer21) Out of \[MgO,\] and \[CaO,\]
which one is more hard and why?
question_answer23) Is \[Ca{{F}_{2}}\] linear or
bent or neither of the two? Justify.
question_answer25) Define lattice enthalpy. How is
it related to the stability of an ionic compound?
question_answer26) Why is solubility of \[MgC{{l}_{2}}\]
much greater than that of \[Mg{{F}_{2}}\]?
question_answer31) Explain how VB theory differs
from Lewis concept.
question_answer32) Out of \[\sigma \] and \[\pi \]-bonds,
which one is stronger and why?
question_answer37) Explain why dipole moment of
hydrogen halides decreases from HF to HI.
question_answer41) Which is more polar \[-C{{O}_{2}}\]
or \[{{N}_{2}}O\]? Give reason.
question_answer43) Why \[Al{{F}_{3}}\] is a high
melting solid whereas \[Si{{F}_{4}}\] is a gas?
question_answer46) Why \[N{{F}_{3}}\] is pyramidal
but \[B{{F}_{3}}\] is triangular planar?
question_answer49) Which d-orbital is involved in \[s{{p}^{3}}d\]
hybridisation and why?
question_answer50) Which d-orbital is involved in \[ds{{p}^{2}}\]
hybridisation and why?
question_answer56) Why axial bonds of \[PC{{l}_{5}}\]
are longer than equatorial bonds?
question_answer59) Write two resonating structures of \[{{N}_{2}}O\]
that satisfy the octet rule.
question_answer67) \[{{N}_{2}}\] has higher bond
order than NO. Explain.
question_answer68) Why \[KH{{F}_{2}}\] exists but \[KHC{{l}_{2}}\]
does not?
question_answer70) Ethanol has higher boiling point
than diethyl ether or ethyl amine. Why?
question_answer71) Why water has maximum density at
277 K?
question_answer73) Out of o-nitro phenol and p-nitro
phenol, which has higher boiling point and why?
question_answer76) Explain why HF is less viscous
than \[{{H}_{2}}O\].
question_answer79) Why \[NaCl\] is a bad conductor
of electricity in the solid state?
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