Title Chemial Bonding 1.pdf ✅

1 JEE ADVANCED 2024 Chemial Bonding Single Correct 1. The possible structure of monothiocarbonate ion is (1) (2) (3) (4) 2. Molecular shapes of SF4, CF4 and XeF4 are respectively: (1) the same with 2, 0 and 1 lone pair of electrons respectively. (2) the same with 1, 1 and 1 lone pair of electrons respectively. (3) different with 0, 1 and 2 lone pair of electrons respectively. (4) different with 1, 0 and 2 lone pair of electrons respectively. 3. The number of lone pair(s) of electrons in XeOF4 is (1) 3 (2) 2 (3) 1 (4) 4 4. In which of the following the maximum number of lone pairs is present on the central atom ? (1) [ClO3] – (2) XeF4 (3) SF4 (4) I3 – 5. The compound(s) with TWO lone pairs of electrons on the central atom is(are). (1) BrF5 (2) ClF3 (3) XeF4 (4) SF4 6. The number of lone pairs on Xe in XeF2, XeF4 and XeF6 respectively are : (1) 3, 2, 1 (2) 2, 4, 6 (3) 1, 2, 3 (4) 6, 4, 2 7. In the anion HCOO– the two C–O bonds are found to be of equal length. What is the reason for it ? (1) Electronic orbits of carbon atom are hybridised. (2) The C=O bond is weaker than the C–O bond. (3) The anion HCOO– has two resonating structures. (4) The anion is obtained by removal of a proton from the acid molecule. 8. Which of the following has maximum number of lone pairs associated with Xe ? (1) XeF4 (2) XeF6 (3) XeF2 (4) XeO3 9. Which of the following exists as covalent crystals in the solid state ? (1) Iodine (2) Silicon (3) Sulphur (4) Phosphorus 10. The correct statement for the molecule, CsI3, is : (1) it is a covalent molecule. (2) it contains Cs + and (3) it contains Cs3+ and I ̄ ions. (4) it contains Cs+ , I ̄ and lattice I2 molecule. 11. Total number of lone pair of electrons in – 3 I ion is (1) 9 (2) 12 (3) 3 (4) 6 Integer Types Questions 12. Total no. of resonating structure in CO3 2– are 13. Compound SO3 has x bond pairs and y lone pairs. Calculate value of x + y. 14. Consider y-axis as internuclear axis, how many of following will lead to  bond formation : (i) py – py (ii) px – px (iii) pz – pz (iv) dxy – dxy (v) dyz – dyz (vi) px – dxy (vii) dxy – pz (viii) dxz – dxz C O S O C O S O S O C O – 3 I DPP - 1
2 Comprehension - 1 Definition: Resonance may be defined as the phenomenon in which two or more structures involving in identical position of atom, can be written for a particular compound. Resonance hybrid: It is the actual structure of all different possible structures that can be written for the molecule without violating the rules of covalence maxima for the atoms. Bond order = Total No. of bonds formed between two atoms in all structures Total No. of resonating structures e.g., Bond order = 2 1 1 1.33 3     Resonance energy = Actual bond energy – Energy of most stable resonating structure.  Stability of molecule  resonance energy.  More is the number of covalent bonds in molecule more will be its resonance energy.  Resonance energy  number of resonating structures. 15. Which is the resonance hybride of sulphate ion : (1) (2) (3) (4) 16. The correct order of increasing C–O bond length of CO, CO3 2– , CO2 is : (1) CO3 2– < CO2 < CO (2) CO2 < CO3 2– < CO (3) CO < CO3 2– < CO2 (4) CO < CO2 < CO3 2– Comprehension # 2 Observe the three columns in which column-1 represents ions, column-2 represents number of equal contributing resonating structure while column-3 represents bond order. Column-1 Column-2 Column-3 (I) SO4 –2 (i) 4 (P) 1.66 (II) CO3 –2 (ii) 6 (Q) 1.25 (III ) NO2 – (iii) 3 (R) 1.33 (IV ) PO4 –3 (iv) 2 (S) 1.5 17. In which of the following combination are correct for hypervalent ion. (1) (I) (ii) (R) (2) (II) (i) (R) (3) (IV) (i) (Q) (4) (III) (iv) (S) 18. In which of the following combination octet is not violated. (1) (IV) (i) (Q) (2) (II) (iii) (R) (3) (II) (i) (R) (4) (III) (iii) (P) 19. In which of the following combination the sum of oxidation state of central atom and number of - bonds is maximum. (1) (I) (ii) (S) (2) (II) (iii) (R) (3) (IV) (i) (Q) (4) (III) (iv) (R)  Resonance hybrid O C O – O – O – C O – O O – C O O –
3 Answer Key 1 . ( 4 ) 2 . ( 3 ) 3 . ( 4 ) 4 . ( 4 ) 5 . ( 2 ) 6 . ( 1 ) 7 . ( 3 ) 8 . ( 3 ) 9 . ( 2 ) 10 . ( 2 ) 11 . ( 1 ) 12 . ( 3 ) 13 . ( 1 2 ) 14 . ( 5 ) 15 . ( 4 ) 16 . ( 4 ) 17 . ( 3 ) 18 . ( 2 ) 19 . ( 1 )