Chemical Bonding PYQs Set 15 (PDF)

Set 15 of 19 · Questions 421-450 of 568

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Chemical Bonding · Set 15 (Q421-450)
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421. $Number of lone pair (s) of electrons on central atom and the shape of B r F_{3} molecule respectively, are :$ (1) $0, triangular planar$ (2) $1, pyramidal$ (3) $2, bent T-shape.$ (4) $1, bent T-shape$ 422. $In the given structure, number of sp and sp^{2} hybridized carbon atoms present respectively are:$ (1) $4 and 5$ (2) $3 and 5$ (3) $3 and 6$ (4) $4 and 6$ 423. $In which one of the following molecules the central atom can be said to adopt s p^{2} hybridization?$ (1) $B e F_{2}$ (2) $B F_{3}$ (3) $C_{2} H_{2}$ (4) $N H_{3}$ 424. $BF_{3} is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are:$ (1) $sp^{3} and 6$ (2) $sp^{2} and 6$ (3) $sp^{2} and 8$ (4) $sp^{3} and 4$ 425. $ln piperidine , the hybrid state assumed by N is$ (1) $sp$ (2) $sp2$ (3) $sp3$ (4) $dsp2$ 426. $The correct increasing order for bond angles among BF_{3}, PF_{3} and ClF_{3} is :$ (1) $BF_{3} < PF_{3} < ClF_{3}$ (2) $ClF_{3} < PF_{3} < BF_{3}$ (3) $PF_{3} < BF_{3} < ClF_{3}$ (4) $BF_{3} = PF_{3} < ClF_{3}$ 427. $In the structure of C l F_{3}, the number of lone pairs of electrons on cetral atom 'Cl' is :$ (1) $one$ (2) $Three$ (3) $four$ (4) $two$ 428. $Which of the following has maximum number of lone pairs associated with Xe ?$ (1) $X e F_{4}$ (2) $XeF$ (3) $X e F_{2}$ (4) $X e O_{3}$ 429. $What are the formal charges on terminal oxygens of ozone molecule?$ (1) $+ 1, - 1$ (2) $+ 1, + 1$ (3) $- 1, - 1$ (4) $0, - 1$ 430. $Which of the following pairs of ions is isoelectronic and isostructural ?$ (1) $C l O_{3}^{-}, I C l_{2}^{-}$ (2) $C O_{3}^{2-}, N O_{3}^{-}$ (3) $C l O_{3}^{-}, C O_{3}^{2-}$ (4) $S O_{3}^{2-}, C O_{3}^{2-}$ 431. $The number of bond pairs of electrons and total number of lone pairs of electrons in XeOF_{4} are respectively.$ (1) $6,10$ (2) $5,15$ (3) $5,10$ (4) $6,15$ 432. $Total number of sigma (σ) and pi (π) bonds respectively present in hex-1-en-4-yne are:$ (1) $3 and 13$ (2) $11 and 3$ (3) $13 and 3$ (4) $14 and 3$ 433. $The oxide which contains an odd electron at the nitrogen atom is$ (1) $N_{2} O$ (2) $N O_{2}$ (3) $N_{2} O_{3}$ (4) $N_{2} O_{5}$ 434. $Dipole‐induced dipole interactions are present in which of the following pairs$ (1) $HC1 and He atoms$ (2) $S i F_{4} and He atoms$ (3) $H_{2} O and alcohol$ (4) $C l_{2} and C C l_{4}$ 435. $The nitrogen oxide(s) that contain(s) N—N bond(s) is(are) :$ (1) $N_{2} O$ (2) $N_{2} O_{3}$ (3) $N_{2} O_{4}$ (4) $N_{2} O_{5}$ 436. $In the structure of C l F_{3}, the number of lone pairs of electrons on central atom ‘Cl’ is$ (1) $one$ (2) $two$ (3) $four$ (4) $three$ 437. $Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals, N O_{2}^{-}, N O_{3}^{-}, N H_{2}^{-}, N H_{4}^{+}, S C N^{-} ?$ (1) $N O_{2}^{-} and N O_{3}^{-}$ (2) $N H_{4}^{+} and N O_{3}^{-}$ (3) $S C N^{-} and N H_{2}^{-}$ (4) $N O_{2}^{-} and N H_{2}^{-}$ 438. $Strongest hydrogen bond is shown by$ (1) $water$ (2) $ammonia$ (3) $hydrogen fluoride$ (4) $hydrogen sulphide.$ 439. $Correct order of bond angle is :$ (1) $S O_{2} < H_{2} S$ (2) $S O_{2} < H_{2} O$ (3) $N H_{3} < H_{2} O$ (4) $N H_{3} < S O_{2}$ 440. $Bond order is an inverse measure of$ (1) $bond length$ (2) $bond angle$ (3) $bond dissociation energy$ (4) $stability$ 441. $Which statement is NOT correct?$ (1) $A sigma bond is weaker than a pi bond.$ (2) $A sigma bond is stronger than a pi bond.$ (3) $A double bond is stronger than a single bond.$ (4) $A double bond is shorter than a single bond.$ 442. $The correct geometry and hybridization for X e F_{4} are$ (1) $octahedral, s p^{3} d^{2}$ (2) $trigonal bipyramidal, s p^{3} d$ (3) $planar triangle, s p^{3} d^{3}$ (4) $square planar, s p^{3} d^{2}$ 443. $Consider the species C H_{4}, N H_{4}^{+} and B H_{4}^{-} . Choose the correct option with respect to the three species:$ (1) $They are isoelectronic and only two have tetrahedral structures$ (2) $They are isoelectronic and all have tetrahedral structures$ (3) $Only two are isoelectronic and all have tetrahedral structures$ (4) $Only two are isoelectronic and only two have tetrahedral structures$ 444. $XeF2 is isostructural with :$ (1) $ΙCl2-$ (2) $SbCl3$ (3) $BaCl2$ (4) $TeF2$ 445. $Dimerisation of solute molecules in low dielectric constant solvent is due to$ (1) $hydrogen bond$ (2) $covalent bond$ (3) $co-ordinate bond$ (4) $ionic bond.$ 446. $The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is:$ (1) $ion-ion interaction$ (2) $ion-dipole interaction$ (3) $London force$ (4) $dipole-dipole attraction$ 447. $The number of nodal planes present in σ^{*} s antibonding orbitals is$ (1) $0$ (2) $3$ (3) $1$ (4) $2$ 448. $In the lewis dot structure for NO_{2}^{-}, total number of valence electrons around nitrogen is ______$ 449. $The number of species below that have two lone pairs of electrons in their central atom is_______ .(Round off to the Nearest integer) S F_{4}, B F_{4}^{-}, CI F_{3}, As F_{3}, PC l_{5}, Br F_{5}, Xe F_{4}, S F_{6}$ 450. $The spin-only magnetic moment value of B_{2}^{+} species is ____x 1 0^{- 2} BM. (Nearest integer) [Given : 3 = 1.73]$