Chemical Bonding PYQs Set 8 (PDF)

Set 8 of 17 · Questions 211-240 of 508

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Mere Teacher · Previous Year Questions NEET Chemistry · Chemical Bonding · Set 8 (Q211-240)
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211. $Which of the following two are isostructural?$ (1) $X e F_{2}, I F_{2}^{-}$ (2) $N H_{3}, B F_{3}$ (3) $C O_{3}^{2 -}, S O_{3}^{2 -}$ (4) $P C l_{5}, I C l_{5}$ 212. $In which of the following molecules, the number of line pairs of electrons on central atom and the number d-orbitals involved in the hybridizations of central atom, is same?$ (1) $ClF_{3}$ (2) $PCl_{5}$ (3) $BrF_{5}$ (4) $SF_{4}$ 213. $Match List-I with List-II List-I Molecule (A) BrF_{5} (B) H_{2} O (C) ClF_{3} (D) SF_{4} List-II Shape (I) T-shape (II) See saw (III) Bent (IV) Square pyramidal$ (1) $(A)-I, (B)-II, (C)-IV, (D)-III$ (2) $(A) -II, (B)-I, (C)-III, (D)-IV$ (3) $(A)-III, (B)-IV, (C)-I, (D)-II$ (4) $(A)-IV, (B)-III, (C)-I, (D)-II$ 214. $Which of the following set of molecules will have zero dipole moment?$ (1) $Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene$ (2) $Nitrogen trifluoride, beryllium difluoride, water 1 , 3-dichlorobenzzene$ (3) $Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene$ (4) $Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene$ 215. $Amongst the following which one will have maximum 'lone pair-lone pair' electron repulsions?$ (1) $XeF_{2}$ (2) $ClF_{3}$ (3) $IF_{5}$ (4) $SF_{4}$ 216. $The group of molecules having identical shape is$ (1) $P C l_{5}, I F_{5}, X e O_{2} F_{2}$ (2) $B F_{3}, P C l_{3}, X e O_{3}$ (3) $C l F_{3}, X e O F_{2}, X e F_{3}^{+}$ (4) $S F_{4}, X e F_{4}, C C l_{4}$ 217. $The molecular geometry of S F_{6} is octahedral. What is the geometry of S F_{4} (including lone pair(s) of electrons, if any) ?$ (1) $Tetrahedral$ (2) $Trigonal bi-pyramidal$ (3) $Square planar$ (4) $Pyramidal$ 218. $In which of the following pairs, both the species are not isostructural?$ (1) $Diamond, Silicon carbide$ (2) $N H_{3}, P H_{3}$ (3) $X e F_{4}, X e O_{4}$ (4) $S i C l_{4}, P C l_{4}^{+}$ 219. $The number of P-O-P bonds in the structure of phosphorus pentaoxide and phosphorus trioxide are respectively:$ (1) $6, 6$ (2) $5, 5$ (3) $5, 6$ (4) $6, 5$ 220. $The correct order of bond angles (smallest first) in H_{2} S, N H_{3}, B F_{3} and S i H_{4} is :$ (1) $H_{2} S < S i H_{4} < N H_{3} < B F_{3}$ (2) $N H_{3} < H_{2} S < S i H_{4} < B F_{3}$ (3) $H_{2} S < N H_{3} < S i H_{4} < B F_{3}$ (4) $H_{2} S < N H_{3} < B F_{3} < S i H_{4}$ 221. $Which of the following is a polar molecule ?$ (1) $SF4$ (2) $SiF4$ (3) $XeF4$ (4) $BF3$ 222. $The molecular shapes of SF4, CF4 and XeF4 are :$ (1) $the same with 2, 0 and 1 lone pairs of electrons on the central atom, respectively.$ (2) $the same with 1, 1 and 1 lone pair of electrons on the central atom, respectively.$ (3) $different with 0, 1 and 2 lone pairs of electrons on the central atom, respectively.$ (4) $different with 1, 0 and 2 lone pairs of electrons on the central atom, respectively.$ 223. $Which of the following structures of a molecule is expected to have three bond pairs and one lone pair of electrons?$ (1) $Trigonal Planar$ (2) $Tetrahedral$ (3) $Octahedral$ (4) $Pyramidal$ 224. $Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is: NH_{3}, AlCl_{3}, BeCl_{2}, CCl_{4}, PCl_{5}$ (1) $1$ (2) $3$ (3) $2$ (4) $4$ 225. $Which of the following diatomic molecular species has only π bonds according to Molecular orbital Theory$ (1) $B e_{2}$ (2) $O_{2}$ (3) $N_{2}$ (4) $C_{2}$ 226. $Among the following compounds, the one which shows highest dipole moment is$ (1) (2) (3) (4) 227. $Identify the incorrect statement related to PCl_{5} from the following:$ (1) $Three equatorial P-Cl bonds make an angle of 120^{\circ} with each other$ (2) $Two axial P-Cl bonds make an angle of 180^{\circ} with each other$ (3) $Axial P - Cl bonds are longer than equatorial P - Cl bonds$ (4) $PCl_{5} molecule is non-reactive$ 228. $The table shown below gives the bond dissociation energies for single covalent bonds of carbon (c) atoms with element A, B, C and D . Which element has the smallest atoms? Bond E_{d i ss (} k J m o l_{)}^{- 1} C‐A 240 C‐B 328 C‐C 276 C‐D 485$ (1) $C$ (2) $D$ (3) $A$ (4) $B$ 229. $Match List I with List II List - I (A) ICl (B) ICl_{3} (C) ClF_{5} (D) IF_{7} List - II (I) T - shape (II) pyramidal (III) Pentagonal bipyramidal (IV) Linear Choose the correct answer from the options given below :$ (1) $(A)-(IV), (B)-(I), (C)-(II), (D)-(III)$ (2) $(A)-(I), (B)-(IV), (C)-(III), (D)-(II)$ (3) $(A)-(IV), (B)-(III), (C)-(II), (D)-(I)$ (4) $(A)-(I), (B)-(III), (C)-(II), (D)-(IV)$ 230. $Which of the following are isoelectronic and isostructural ? NO_{3}^{-}, CO_{3}^{2-}, ClO_{3}^{-}, S O_{3}$ (1) $NO_{3}^{-}, CO_{3}^{2-}$ (2) $S O_{3}, NO_{3}^{-}$ (3) $ClO_{3}^{-}, CO_{3}^{2-}$ (4) $CO_{3}^{2-}, S O_{3} .$ 231. $A covalent molecule A B_{3} has pyramidal structure. The number of lone pair and bond pair electrons in the molecule are respectively$ (1) $0 and 4$ (2) $3 and 1$ (3) $1 and 3$ (4) $2 and 2$ 232. $Which among the following species has unequal bond lengths ?$ (1) $Xe F_{4}$ (2) $Si F_{4}$ (3) $B F_{4}^{-}$ (4) $S F_{4}$ 233. $What is formal charge on carbon in the following Lewis structure?$ (1) $0$ (2) $1$ (3) $-1$ (4) $2$ 234. $Consider the following statement (A) N F_{3} molecules has a trigonal planar structure. (B) Bond Length of N_{2} is shorter than O_{2} . (C) Isoelectronic molecules or ions have identical bond order. (D) Dipole moment of H_{2} S is higher than that of water molecule. Choose the correct answer from the options given below:$ (1) $(A) and (B) are correct$ (2) $(A) and (D) are correct$ (3) $(C) and (D) are correct$ (4) $(B) and (C) are correct$ 235. $Given below are two statements: one is labelled as Assertion A and the other is labelled asReason R : Assertion A : The H-O-H bond angle in water molecule is 104.5° ReasonR: The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion.$ (1) $A is false but R is true$ (2) $Both A and R are true, but R is not the correct explanation of A$ (3) $A is true but R is false$ (4) $Both A and R are true, and R is the correct explanation of A$ 236. $Which one of the following has the shortest carbon carbon bond length?$ (1) $Benzene$ (2) $Ethene$ (3) $Ethyne$ (4) $Ethane$ 237. $The hybridisation of orbitals of N atom in NO_{3}^{-}, NO_{2}^{+} and NH_{4}^{+} are respectively$ (1) $sp, s p^{2}, s p^{3}$ (2) $s p^{2}, sp, s p^{3}$ (3) $sp, s p^{3}, s p^{2}$ (4) $s p^{2}, s p^{3}, sp$ 238. $The formal charge on central oxygen atom in ozone is$ (1) $0$ (2) $+2$ (3) $+1$ (4) $-1$ 239. $The number of P—O—P bonds in tricyclic metaphosphoric acid is$ (1) $zero$ (2) $two$ (3) $three$ (4) $four$ 240. $For O F_{2} molecule consider the following (A) Number of lone pairs on oxygen is 2. (B) FOF angle is less than 104.5°. (C) Oxidation state of O is -2. (D) Molecule is bent *V shaped. (E) Molecular geometry is linear. Correct options are:$ (1) $C, D, E only$ (2) $B, E, A only$ (3) $A, C, D only$ (4) $A, B, D only$