Which of these statement is false?
A) The canonical structure does not have a real existence
B) Every `AB_(5)` molecule has a square pyramid structure
C) Electron deficient molecules act as Lewis acids.
D) Multiple bonds are shorter than their corresponding single bond.

A covalent molecule AB_(3) has pyramidal structure. The number of lone pair and bond pair electrons in the molecule are respectively

Which of the following molecules have coordinate bond in it's Lewis structure?

Which of the following quantified statement is true?A) The square of every real number is positive (B) There exists a real number whose square is negative (C) There exists a real number whose square is not positive(D) Every real number is rational.

Which of the following statements is (are) true about resonance. (a) Resonance is an intramolecular process. (b) Resonance involves delocalization of both sigma " and " pi electrons. (c )Resonance involves delocalization of pi electrons and lone pair only. (d) Resonance decreases potential energy of a molecule. (e ) Resonance has no effect on the potential energy of a molecule. (f)Resonance is the only way to increase molecular stability. (g) Resonance is not the only way to increase molecular stability. (h) Any resonating molecule is always more stable than any nonresonating molecule. (i) The canonical structure explains all features of a molecule. (j) The resonance hybrid explains all features of a molecule. (k)Resonating structures are real and resonance hybrid is imaginary. (l) Resonance hybrid is real and resonating structures are imaginary. (m) Resonance hybrid is always more stable than all canonical structures.

Which of the following statement are true and false ? (a) In PCl_(5) hybridisation is sp^(3) d and it has a trigonal pyramidal structure. (b) The angle between the P-Cl bonds is 90^(@), which is same for all the P and Cl present in PCl_(5) The bond length of P-Ci in axial position is higher than in equitorial position PCl_(5) have zero dipole moment Choose the correct option.

Which of the following is/are correct A) In the resonance structures, sigma bonding electrons do not take part B) Resonance hybrid has comparatively less energy C) During resonance displacement of atoms takes place. D) Resonance takes place in planar molecules

Which of the following is/are incorrect. A) Acetic acid has more boiling point than ethanol B) Acetic acid molecules exist as cyclic dimer through hydrogen bond in water C) With the increase of molecular mass solubility of carboxylic acids in water is increased D) The \(P_{Ka}\) of acetic acid is more than that of benzoic acid

The distribution of electrons among molecular orbitals is called the electronic configuration of the molecule which provides us the following very important informations about the molecule. (A)Stability of molecule : The molecule is stable if number of bonding moleculer orbital electrons (N_b) is greater than the number of antibonding molecular orbital electrons (N_a) . (B) Bond order : Bond order =1/2(N_b-N_a) A positive bond order means a stable molecule while a negative or zero bond order means an unstable molecule. ( C)Nature of the bond : Bond order 1,2 and 3 corresponds to single , double and triple bonds respectively. (D)Bond length: Bond length decreases as bond order increases. (E)Magnetic nature: Molecular orbitals in a molecule are doubly occupied , the substance is diamagnetic and if one or more molecular orbitals are singly occupied, it is paramagnetic. N_2 has greater dissociation energy than N_2^+ , where as O_2 has a lower dissociation energy than O_2^+ because