Chemical Bonding PYQs Set 7 (PDF)

Set 7 of 19 · Questions 181-210 of 568

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Chemical Bonding · Set 7 (Q181-210)
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181. $The bond length between hybridised carbon atom and other carbon atom is minimum in$ (1) $propene$ (2) $propyne$ (3) $propane$ (4) $butane.$ 182. $Observe the following molecules/ions H_{2}, N_{2}, O_{2}, N_{2}^{+}, O_{2}^{+}, O_{2}^{-}, F_{2} . Identify correct statement.$ (1) $H_{2}, N_{2}, O_{2}, F_{2} show diamagnetic property$ (2) $O_{2}, O_{2}^{+}, O_{2}^{-}, N_{2}^{+} show paramagnetic property$ (3) $N_{2}, F_{2}, O_{2}^{+}, O_{2}^{-} show diamagnetic property$ (4) $H_{2}, N_{2}^{+}, O_{2}^{+}, O_{2}^{-} show paramagnetic property$ 183. $If the bond order in C_{2} is ' x' then the bond order in B_{2} and O_{2}, respectively are$ (1) $\frac{1}{2} x, 2 x$ (2) $x, x$ (3) $\frac{1}{2} x, x$ (4) $x, 2 x$ 184. $A metal, M forms chlorides in +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?$ (1) $M C l_{2} is more volatile than M C l_{4}$ (2) $M C l_{2} is more soluble in anhydrous ethanol than M C l_{4}$ (3) $M C l_{2} is more ionic than M C l_{4}$ (4) $M C l_{2} is more easily hydrolyzed than M C l_{4}$ 185. $In CO_{2} molecule, the hybridisations of carbon and oxygen atoms are respectively.$ (1) $Carbon Oxygen sp s p^{2}$ (2) $Carbon Oxygen s p^{2} s p^{2}$ (3) $Carbon Oxygen sp sp$ (4) $Carbon Oxygen s p^{2} s p^{3}$ 186. $Identify the correct order of acidic strengths of C O_{2}, CuO, CaO, H_{2} O.$ (1) $CaO < CuO < H_{2} O < C O_{2}$ (2) $H_{2} O < CuO < CaO < C O_{2}$ (3) $CaO < H_{2} O < CuO < C O_{2}$ (4) $H_{2} O < C O_{2} < CaO < CuO$ 187. $Which one of the following molecules has maximum dipole moment?$ (1) $NF_{3}$ (2) $CH_{4}$ (3) $PF_{5}$ (4) $NH_{3}$ 188. $Identify all the species that do not exist H_{2}^{+}, He_{2}^{2 +}, Li_{2}^{2 -}, Ne_{2}, Be_{2}^{-}, He_{2}$ (1) $He_{2}, Ne_{2} only$ (2) $Li_{2}^{2 -}, Ne_{2}, He_{2} only$ (3) $Be_{2}^{-}, He_{2}, Ne_{2} only$ (4) $H_{2}^{+}, Li_{2}^{2 -} only$ 189. $The correct pair of species with (A) the highest bond order and (B) diamagnetic character is A B$ (1) $O_{2} O_{2}^{+}$ (2) $O_{2}^{+} O_{2}^{2 -}$ (3) $O_{2}^{-} O_{2}$ (4) $O_{2}^{2 -} O_{2}^{+}$ 190. $Using MO theory predict which of the following species has the shortest bond length ?$ (1) $O_{2}^{+}$ (2) $O_{2}^{-}$ (3) $O_{2}^{2-}$ (4) $O_{2}^{2 +}$ 191. $Dipole-induced dipole interactions are present in which of the following pairs :$ (1) $Cl2 and CCl4$ (2) $HCl and He atoms$ (3) $SiF4 and He atoms$ (4) $H2O and alcohol$ 192. $Which of the following molecule does not have a linear arrangement of atoms?$ (1) $H_{2} S$ (2) $C_{2} H_{2}$ (3) $B e_{2}$ (4) $C O_{2}$ 193. $Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule B_{2} is:$ (1) $1 and diamagnetic$ (2) $0 and diamagnetic$ (3) $1 and paramagnetic$ (4) $0 and paramagnetic$ 194. $According to molecular orbital theory, which of the following will not be a viable molecule?$ (1) $H_{2}^{-}$ (2) $H_{2}^{2 -}$ (3) $H e_{2}^{2 +}$ (4) $H e_{2}^{+}$ 195. $Two pi and half sigma bonds are present in$ (1) $N_{2}^{+}$ (2) $O_{2}$ (3) $O_{2}^{+}$ (4) $N_{2}$ 196. $In which of the following molecules, all bond lengths are not equal?$ (1) $SF_{6}$ (2) $PCl_{5}$ (3) $BCl_{3}$ (4) $CCl_{4}$ 197. $Which one of the following pairs is an example of polar molecular solids?$ (1) $S O_{2} (s), C O_{2} (s)$ (2) $S O_{2} (s), N H_{3} (s)$ (3) $MgO(s) S O_{2} (s)$ (4) $HCl(s),AlN(s)$ 198. $Which theory can explain bonding of Ni (CO)_{4} :$ (1) $MOT$ (2) $CFT$ (3) $VBT$ (4) $Werner’s theory$ 199. $Which of the following are Lewis acids ?$ (1) $P H_{3} and S i C l_{4}$ (2) $B C l_{3} and A l C l_{3}$ (3) $P H_{3} and B C l_{3}$ (4) $A l C l_{3} and S i C l_{4}$ 200. $Which of the following is an incorrect statement?$ (1) $Hydrogen bonding is stronger than dispersion force.$ (2) $Sigma bonds are stronger than π -bonds.$ (3) $Ionic bonding is non-directional.$ (4) $σ -electrons are referred to as mobile electrons.$ 201. $N_{2} and O_{2} are converted into monocations, N_{2}^{+} and O_{2}^{+} respectively. Which is wrong?$ (1) $In O_{2} paramagnetism decreases.$ (2) $N_{2}^{+} becomes diamagnetic.$ (3) $In N_{2}, the NN bond weakens.$ (4) $In O_{2}, the OO bond order increases.$ 202. $Identify a molecule which does not exist.$ (1) $Li_{2}$ (2) $C_{2}$ (3) $O_{2}$ (4) $He_{2}$ 203. $Statement-1 : Band gap in germanium is small, because Statement-2 : The energy spread of each germanium atomic energy level is infinitesimally small.$ (1) $Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.$ (2) $Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1$ (3) $Statement-1 is True, Statement-2 is False$ (4) $Statement-1 is False, Statement-2 is True$ 204. $In which of the following shape is same but hybridization is different:$ (1) $I C l_{2}^{-}, X e F_{2}$ (2) $S O_{2}, N O_{2}^{+}$ (3) $S O_{2}, N H_{2}^{-}$ (4) $C O_{2}, S O_{2}$ 205. $Find out the bond order in He_{2}, He_{2}^{+}, O_{2} and O_{2}^{+}, respectively$ (1) $0, 0.5, 2 and 3$ (2) $0.5, 0, 3 and 2$ (3) $0, 0.5, 2 and 1$ (4) $0, 0.5, 2 and 2.5$ 206. $In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?$ (1) $NO ⟶ NO^{+}$ (2) $O_{2} ⟶ O_{2}^{2 -}$ (3) $O_{2} ⟶ O_{2}^{+}$ (4) $N_{2} ⟶ N_{2}^{+}$ 207. $If A B_{4} molecule is a polar molecule, a possible geometry of A B_{4} is$ (1) $Tetrahedral$ (2) $Rectangular planar$ (3) $Square pyramidal$ (4) $Square planar$ 208. $Match List I with List II LIST-I (molecules/ions) (A) I F_{7} (B) I C l_{4}^{-} (C) X e F_{6} (D) X e F_{2} LIST-II (No. of lone pairs of e^{-} on central atom) I. Three II. One III. Two IV. Zero Choose the correct answer from the options given below:$ (1) $A-II,B-III,C-IV,D-I$ (2) $A-IV,B-III,C-II,D-I$ (3) $A-II, B-I, C-IV, D-III$ (4) $A-IV,B-I,C-II,D-III$ 209. $What is the best description of the change that occurs when N a_{2} O(s) is dissolved in water?$ (1) $Oxide ion accepts sharing in a pair of electrons$ (2) $Oxide ion donates a pair of electrons$ (3) $Oxidation number of oxygen increases$ (4) $Oxidation number of sodium decreases$ 210. $The number of species from the following in which the central atom uses sp^{3} hybrid orbitals in its bonding is________NH_{3}, SO_{2}, SiO_{2}, BeCl_{2}, CO_{2}, H_{2} O, CH_{4}, BF_{3}$