Chemical Bonding — Important Questions
Maharashtra Board · Class 11 · Chemistry
45 important questions from Chemical Bonding for Maharashtra Board Class 11 Chemistry, with answers. Includes multiple choice and multiple correct.
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Important Questions from Chemical Bonding
Which of the following compounds are held together by covalent bonds? (Select all correct answers)
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H₂O, CH₄, NH₃
H₂O, CH₄, and NH₃ are covalent compounds formed by sharing electrons. NaCl and CaF₂ are ionic compounds formed by electron transfer between metals and non-metals.
Which of the following molecules have polar covalent bonds? (Select all correct answers)
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HCl, H₂O, NH₃
Polar covalent bonds form between atoms with different electronegativities. HCl, H₂O, and NH₃ have polar bonds due to electronegativity differences, while H₂ and Cl₂ have nonpolar bonds.
What is the molecular geometry of NH₃?
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Trigonal pyramidal
NH₃ has a trigonal pyramidal geometry due to sp³ hybridization of nitrogen with one lone pair, which pushes the three N-H bonds closer together, giving a pyramidal shape.
Lattice enthalpy is:
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Energy required to separate one mole of ionic solid into gaseous ions
Lattice enthalpy is the energy required to completely separate one mole of solid ionic compound into gaseous ions at infinite distance. It measures the strength of ionic bonds in the crystal.
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