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SHREE RAJLAXMI ROYAL ACADEMY OF SCIENCE VITA., , CHEMICAL BONDING DPP:-7, , SUB TOPIC:- BOND ANGLES., , , , Which one of the following compounds has bond angle as nearly 90°, , (a) NH, {b) HS (c) H,O (d) CH,, , The bond angle around the O atom in ethanol (C,H,OH) is, , (a) = 90° {b) = 120° (c) = 109° (d) 180°, , From among the following triatomic species, the least angle around the central atom is in, , (a) O, (b) I; (c) NO, (d) HS, , The H—O-—H angle in water molecule is about, , (a) 90° {b) 180° (c) 104° (d) 75°, , Which of the following has the least bond angle, , (a) BeF, (b) H,O (c) NH, (d) CH,, , Which one of the following has the shartest carbon, carbon bond length, , (a) Benzene {b) Ethene (c) Ethyne (d) Ethane, , Which of the following has the highest bond angle, , (a) BE, (b) H,O (c) NH, (d) CH,, , Which of the following has the lowest bond angle, , (a) H,O {b) HS (c) NH, (d) PH,, , In which of the following species the angle around the central atom is exactly equal to 109°. 28", , (a) SF, (b) NH,, , (c) NH; (d) None of the above, , The bond angle in H.S is, , (a) > NH, (b) Same as in BeCl,, , (c) > H,Se<H,O (d) Same as in CH,, , The bond angle in H,O molecule is less than that of NH, molecule because, , (a) The hybridisation of Oin H,O and Nin NH, is different, , (b) The atome radii of NW and O are different, , (c) There is one lone pair of electrons an O and two lone pairs of electrons on N, , (d) There are two lone pairs of electrons on O and one lone pair of electrons on N, (12) The correct sequence of decrease in the bond angle of the following hydrides is, , (a) NH, > PH, > AsH, > SbH, (b) NH, > AsH, > PH, > SbhH,

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(c) SbH, > AsH, > PH, > NH, (d) PH, > NH, > AsH, > SbH,, The bond angle of H,X (where X is a sixth group element) as one goes down the group, , (a) Increases (b) Decreases, (c) Does not change (d) Changes irregularly, Which of the following is the correct reducing order of bond-angle, , (a) NH, <CH, <C,H, <H,O {b) C,H, > NH, > H,O<CH,, , (c) NH, > H,O>CH, < C,H, (d) H,O< NH, > CH, < C,H,, , The correct increasing bond angle among BF, .PF, and CIF, follows the order, , (a) BF, < PF, < CIF, (b) PF < BF, <CIF,, , (c) CIE, < PE < BF, (d) BE, = PE, =CIF, , The correct order of the bond angle is, , (a) NH, > H,O> PH, > H,S (b) NH, > PH, >H,O>H,S, , (c) NH, > H,S > PH, > H,O (d) PH, > H,S> NH, > H,O, , The bond angle around the central atom is highest in, , (a) BBr, (b) CS, (c) SO, (d) SE,, , Which of the following set contains species having same angle around the central atom, (a) SE,.CH,, NH, {b) NF,, BCI,,NH, (c) BE,NE. AICI, = (d) BE. BCL, ,BBr,, Among the following orbital bonds, the angle is minimum between, , (a) sp° bonds (b) p, and p, orbitals, (c) H—O-H in water (d) sp bonds, The bond angle in Cl,O is nearly 111° whereas bond angle in F,O is nearly 103°. This is because, , (a) Electronegativity of Fluorine is greater than that of oxygen, , (b) Size of chlorine atom is greater than that of Fluorine, , (c) Chlorine contains d orbitals whereas Fluorine does not, , (d) The number of lone pairs present on Fluorine and chlorine is not equal