CBSE Class 11 (Science) Chemical Bonding and Molecular Structure — practice questions
112 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) Chemical Bonding and Molecular Structure in the app →According to VSEPR theory, the shape of a molecule is determined byThe hybridisation of carbon in methane (CH₄) isWhich molecule is non-polar despite having polar bonds?The bond order of the oxygen molecule O₂ (by molecular orbital theory) isA coordinate (dative) bond differs from a normal covalent bond in thatWhich species has sp hybridisation on the central atom?As bond order increases, bond lengthAn ionic bond forms byThe shape of NH₃ is pyramidal rather than planar becauseWhich has the highest dipole moment?Among the following, which is paramagnetic?Formal charge on an atom = As per your syllabus, which species violates the octet rule because of an ODD electron count?As per your syllabus, the H-O-H BOND ANGLE in water molecule is which value?As per your syllabus, the order of repulsion between electron pairs in VSEPR is which?As per your syllabus, what is the geometry of a molecule of type AB₅ with NO lone pairs on the central atom (eAs per your syllabus, what is the geometry of a molecule of type AB₆ with NO lone pairs (e.g. SF₆)?As per your syllabus, the shape of XeF₄ (4 bp + 2 lp on Xe) is which?As per your syllabus, BCl₃ has its boron sp² hybridised. What is the molecular geometry + bond angle?As per your syllabus, in sp³ hybridisation (e.g. CH₄), each hybrid has 25% s + 75% p character. What is the H-As per your syllabus, the C=C double bond consists of what, and each carbon's hybridisation is which?As per your syllabus, PCl₅ uses what hybridisation, and gives what geometry?As per your syllabus, SF₆ uses what hybridisation, and gives what geometry?As per your syllabus, the MOT bond order of oxygen is computed as which?As per your syllabus, the magnitude of hydrogen bonding depends on the physical state of the compound — and isThe shape of the methane (CH$_4$) molecule is:The hybridisation of carbon in ethyne (HC$\equiv$CH) is:An IONIC bond is formed by:The bond in N2 (nitrogen molecule) is a:In the H3O+ ion, the bond between H+ and H2O is a:The geometry of CH4 (methane) as predicted by VSEPR is:The hybridisation of carbon in C2H4 (ethylene, with a C=C double bond) is:Molecular Orbital Theory uniquely EXPLAINS why O2 is:The molecule CO2 has zero net DIPOLE MOMENT because:Which two chemists developed the VSEPR theory in 1957?In VSEPR theory, valence electron pairs around an atomHow does VSEPR theory count a double bond on the central atom?What is the steric number of a central atom?Sulfur in SF4 has four ligands and one lone pair. What is its steric number?Why is the H–O–H angle in water 104.5° and not 109.5°?In VSEPR theory, which repulsion is the strongest?NH3 has three bond pairs and one lone pair. Its electron pairs are arrangedIodine heptafluoride has a steric number of 7. Its base geometry isXeF4 has six electron pairs, two being lone pairs. Its shape isIn octahedral hexaaquo complexes of V3+ to Zn2+, the d-electron lone pairs areWhy are the X–A–X angles in SOCl2 not all equal?In the carbonate ion, each O–C–O angle isWhich alternative name is used for the VSEPR theory?Who first developed the hybridisation theory in 1931?What s and p character does each sp3 hybrid orbital have?How many p orbitals mix with the 2s orbital in sp2 hybridisation?After sp hybridisation of carbon, how many pure p orbitals remain?In methane formation, an electron is promoted from carbon'sCarbon's ground state electron configuration isThe octet rule is based on the chemical inertness of which elements?Compounds like XeF2 weaken the octet idea that noble gases areNitric oxide cannot satisfy the octet on every atom because it hasHow many electrons surround sulfur in sulfur dichloride, SCl2?How many electrons surround beryllium in BeCl2?Which species has an incomplete octet on its central atom?What is the formal charge on nitrogen in the NH4+ ion?What is the formal charge on a terminal oxygen joined by a single bond in O3?The lowest energy Lewis structure generally hasFormal charges in a Lewis structure indicateWhich pairing favours ionic bond formation?Lattice enthalpy is the energy to separate one mole of an ionic solid intoA qualitative measure of ionic compound stability is itsAn ionic crystal is held together byIonic crystals form even when IE plus EGE is positive because ofWhich cation, made of non-metals, still forms ionic compounds?Bond length is the equilibrium distance betweenBond angle is the angle between the orbitals containingBond enthalpy is the energy to break one mole of bonds in which state?Among N2, O2, H2 and HCl, which has the largest bond enthalpy?A larger bond dissociation enthalpy means the bond isBreaking the two O–H bonds in water takes 502 and 427 kJ/mol. The average isWhich species does NOT have bond order 3?Which halogen molecule has the longest bond among F2, Cl2, Br2 and I2?Which of these carbon bonds has the shortest length?The O–O bond lengths in ozone areResonance between canonical forms is shown byCanonical forms of one resonance hybrid must have the same positions ofIn HF the shared electron pair is displaced towardDipole moment is the product of charge magnitude andThe dipole moment of a polyatomic molecule is the ___ sum of bond dipoles.CO2 has zero dipole moment because its bond dipolesBF3 is nonpolar because its three bond momentsNF3 has a much smaller dipole moment than NH3 becauseThe partial covalent character of ionic bonds was explained byWhich lithium halide has the greatest covalent character?Of two cations of equal size and charge, which polarises anions more?Which order of VSEPR repulsions is correct?Why do lone pairs repel more than bond pairs?Five electron pairs with no lone pair give which geometry?What hybridisation does phosphorus show in PCl5?What is the shape of the PCl5 molecule?SF6 has what molecular geometry?The H–N–H bond angle in ammonia is aboutWhat is the angle between sp3 hybrid orbitals?Another name for sp hybridisation isHybridisation produces new orbitals that areA sigma bond is formed by which type of orbital overlap?Why is a sigma bond stronger than a pi bond?How many sigma and pi bonds are in ethyne, C2H2?Ethene contains how many sigma bonds in total?A bonding molecular orbital has energy that is ___ the combining atomic orbitals.An antibonding molecular orbital has a nodal planeSix atomic orbitals combine. How many molecular orbitals form?Which of these diatomic molecules is paramagnetic?A substance with all electrons paired in molecular orbitals isWhich set of atoms can form hydrogen bonds with hydrogen?Which compound shows intramolecular hydrogen bonding?