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223. =P — is oe as the overlapping, (A) _ half filled s-orbital and completely fill, p-orbital containing eee” “th, opposite spins, (B) half filled s-orbital and completely filled, p-orbital containing electrons with, parallel spins ., (C) half filled s-orbital, p-orbital containing, opposite spins, (D) half filled s-orbital and half filled, p-orbital containing electrons with, parallel spins, 224, A hybrid orbital formed from s and p-orbital, can contribute to, (A) o bond only, (B) 1 bond only, (C) either o or x bond, (D) cannot be predicted, , 225, H-X bond is formed due to :, (A) s-soverlapping (B) s-p overlapping, (C) p-poverlapping (D) none of these, 226. Which of the following is INCORRECT for, s-p overlapping?, , , , and half filled, electrons with, , (A) Hydrogen fluoride molecule is Neh, , , , , example of s-p overlapping. &, (B) Formation of a pi bond is possi, }o Both the involved i are, s half—filled., (D) Fluorine molecule is notaiheamol of, s-p overlapping., 227. In which of the fo! molecules,, overlapping of only p involved?, @ Fr (ii) Mm, (A) @ ) (ii) and (iii), , |, =, , , , (©) (and Gi) (D) Allof these, , 228. The p-p orbital overlap is present in which of, , the following?, (A) Hy (B) HBr, (Cc) HCI (D) Ch, , 229. A double bond between two carbon atoms, consists of, , , , (A) two sigma bonds, , (B) two pi bonds, , (C) one sigma and one pi bond, (D) apair of electrons, , , , , , . The triple bond between N atoms of nitrogen, molecule (N = N) consists of, (A) _ three o-bonds, (B) two o-bonds and one x bond, , (C) one a-bond and two x-bonds, , (D) three n-bonds, , 231, Which of the following elements forms px — Px, , bond with itself? : ay [KCET 2017), (A) P ) Se, ‘Yo, , (c) N ) Te, , 232, Which of the Gotowing molecules has no, xbond? . \S, , (A) Ci (B) CHa, (c) exane (D) Benzene, , NOT existin, ane, boron trifluoride, beryllium difluoride, *%O ) all of these, 4, The oxygen molecule contains ___(A) two o-bonds ., (B) two x-bonds, (C) one o-bond and one x-bond, (D) ionic bond, 235, In methane molecule, the bond between, carbon and hydrogen is., (A) _ purely sigma, (B) purely pi, (C) sigma and pi alternatively, (D) purely ionic, , 236. A molecule is found to have three sigma, bonds, no pi bond and no lone pair of, electrons. The molecule can be, (A) ammonia, (B) water, (C) _ beryllium difluoride, (D) boron trifluoride, , 237, m-bonds are formed by overlapping of, (A) partially filled p-orbital, (B) unhybridized p-orbitals, (C) hybridized p-orbitals, (D) all types of p-orbitals, , 233. Pi, , , , , , an

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13,, , REPRE RL Ape oe ne, , n bond?, , (A) bond is formed by, overlapping., , (B) Formation of x bond may involve, ‘s’ orbital., , (C), , (D), , sidewise, , Formation of only = bond is not possible., a-bond involves less overlapping than, o-bond., , Fluorine molecule is formed by :, (A) the co-axial p-p orbital overlap, (B) _ the sidewise p-p orbital overlap, (C)_ s-s orbital overlap, , (D) _ s-p orbital overlap, , . Formation of x-bond 7, , (A) _ increases bond length, , (B) decreases bond length, , (C) distorts the geometry of molecule, , (D) makes homoatomic molecules more, reactive, , Assertion: According to the valence bond, theory, the H-N-H bond angle in NH;, is 90°., , Reason:, , In formation of NHs, three, , 2p orbitals of nitrogen which are 90° to each., , other overlap with three Is orbitals of, hydrogen., (A) Assertion and Reason are true. Reaso', the correct explanation of Asserti, (B) Assertion and Reason are true. is, not the correct explanation of jon., (C), (), , Assertion is true. Reason is, Assertion is false. Reason i, Total number of x bonds in:, CH; - CH = CH — CH; — is, , (B) 2, , , , , , ) 4, , CH, = CH - CH = CH - C=CH is ., (A) 5 @ 9 © H @) 10, , . How many o and x bonds are there in the, , molecule given below?, x, ws [X= Cl, Br or I], One o and one 7 bond, Two o and two x bond, Three o and three n bond, , Three o and one x bond, , (A), (B), (C), (D), , (A) 120,0% (Bb) iwo,in, (C) 106,2% (D) 86,2%, Number of 2 bonds and o bonds in the, , following structure is, H, , H ‘ H, , 246., , H H, , H [NCERT Exemplar}, ) 4,20, , (A) 619,, OHO) 5,20, , (C) 5,19, 247., , Formaldehyde molecule contains ;, (A) 3oand, , nds, , , , , of number of o and x-bonds in, 3-yne is, , , , ® 2 ©@©4 M3, , 4, , 49.°C = C bond energy is not twice of, , , , C-C because :, , (A) C=C has one x-bond and one o-bond, (B) C=C has two x-bonds, , (C) C=C has one n-bond and two o-bonds, (D) C=C has two o-bonds, , 250. Which of the following species contains equal, number of o- and x—-bonds? [AIPMT 2015], (A) HCO; (B) XeO,, (C) (CNp (D) CHACN), , f = ere, 4.10 EC os, , 251. Hybridization is 5, (A) _ excitation of electron, (B) mixing and recasting of atomic orbitals, (C) removal of an electron pair, (D) formation of o-bonds, 252. Which of the following is INCORRECT, statement?, (A) Atomic orbitals of the same atom oF, same ion undergo hybridization., (B) Hybridized orbitals are equivalent in the, respect of energy content., (C), (D), , , , Hybridization is not a real concept., Orbitals undergoing —_ hybridization, possess only single electron., , , , —_—

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., , 255., , 257., , 258., , , , 259,, , , , Which of the following statements, INCORRECT? ne ., , (A) Orbitals of single atom only would, undergo hybridization., , (B) There should be very little difference in, , energy of involved orbitals., , The hybrid orbitals are equal to the, , number of orbitals involved., , The electrons undergo hybridization and, not the orbitals., , (Cc), , (D), , If “n” s-orbitals and “m"” p-orbitals take part in, —— hybrid orbitals obtained will be, , , , (A) n+m (B) m-n, , (Cc) m (D) mxn, , Which step is NOT involved in hybridization?, (A) Formation of excited state, , (B) Mixing and recasting of orbitals, , (C) Orientation of hybrid orbitals, , (D) Overlapping of atomic orbitals, , . Tetra covalency of carbon can be explained by, , the concept of, , (A) hybridization (B) resonance, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , (C) M.O, theory (D) V.B. theory, Maximum covalency of carbon is, {A) 2 (B) 4, (C) 6 (D) infinite, Which of the following is the clec, configuration of nitrogen atom in the, state?, , Is 2s 2px _2Py KR, ™ th} (tl) tts, , Is 2s 2p., ® |{f t t, , Is 2s 2px 2py .2Pz, of} fi Gut, , 2s 2p, 2py 2), , of i wn, , , , , , , , , , , , , , , , Four equivalent orbitals from the four orbitals, 2s, 2p., 2p, and 2p, can be formed by ___(A) _ resonance (B) _ splitting, , (OV excitation (D) hybridization, , 260., , 261., , 262., , 263., , 65,, , 266., , 267., , , , Which carbon is more electronegative?, , (A) sp* hybridized carbon, , (B) sp hybridized carbon, , (C) sp* hybridized carbon, , (D) The electronegativity of C is always, same irrespective of its hybrid state., , Increasing order of size of various hybrid, , orbitals i is, , (A) sp P< sp < *, , (©) sp<sp’<sp’ Sp = sp’ = sp, , In which of the followi lecule does the, , central atom have oe itals unused?, (A) BFs ) BeF,, (D) CGH:, s present in valence shell, , (B) sp< sp < sp", , , , , , , , pair-three lone pair, bond pair-one lone pair, , ='C - CH =CH;, the number of carbon, having sp, sp’ and sp’ hybrid orbitals, , (B) 1,12, (C) 2,1,1 (D) 2,2,0, , Which of the following statements is, INCORRECT?, , (A) Hybridization is the mixing of atomic, orbitals prior to their combining into, molecular orbitals., , sp’ hybrid orbital are formed from two, Pp atomic orbitals and one s atomic orbital., dsp* hybrid orbitals are all at 90° to one, another., , sp’ d’ hybrid orbitals are directed, towards the corners of a trigonal, bipyramidal., , sp’-sp*-sp—sp mode of hybridization from left, to right is represented by the compound, , (B), (C), (D), , , , (A) H,C=CH-C#=CH, (B) HC=C-C#=CH, , (C) HC=C=C=CH,, (D) H.C #—~<— CH,, , Carbon atoms in C.(CN), are, (A) sp-hybridized, , (B) sp’-hybridized, , (C) spand sp’-hybridized, (D) sp, sp’ and sp’-hybridized