!"#$%#&'()$*+,-.#/0*123*2415 Practice your Chemistry Knowledge HEPTA INTERACTION QUESTIONS (7th series) Topic: Molecular structure and bonding. Q1.Which of the following is an ionic compound ? (a) HCN (b) CCl4 (c) KCl (d) CO2 Q2. Which of the following has electrovalent linkage? (a) MgCl2 (b) CH4 (b) (c) SiCl4 (d) BF3 Q3.On hybridization of one S- and two P- orbitals we get (a) Two mutually perpendicular orbitals (b) two orbitals at 180o (c) four orbitals directed tetrahydrally (d) three orbitals in a plane. Q4.Which of the following has a bond formed by sp-sp3 hybrid orbitals? (a) CH3-CCH (b) CH3-CH=CH-CH3 (c) CH2-CH-CH=CH2 (d) HCCH Q5.The bond distance is longest in (a) C2H2 (b) C2H4 (c) C2H6 (d) C2H4Br2 Q6.The species in which the central atom uses sp3 hybrid orbitals in its bonding is (a) PH3 (b) NH3 (c) CH3+ (d) SbH3 Q7.CO2 isostructural with (a) HgCl2 (b) SnCl2 (c) C2H2 (d) NO2 Q8.The molecule having one unpaired electron is (a) NO (b) CO + (c) CN (d) O2 Q9.The bond between C-atom (1) and C atom (2) in the compound NC1C2H=CH2 (a) sp2 and sp2 2 (c) sp and sp (b) sp3 and sp (d) sp and sp Q10.CCl4 has zero dipole because of (a) its planar structure (b) its regular tetrahedral structure (c) similar size of C and Cl (d) None of above Answers in the 8th series Ans. to 6th Series Q1 b, Q2 a, Q3 c, Q4 d, Q5 c, Q6 d, Q7 b, Q8 c, Q9 c, Q10 a Hepta Interaction Centre most welcomes your suggestion(s) to improve this sheet in the next series. M. Aken Singh (9862125442) e-mail:-aken569@gmail.com Or aken_maibam@yahoo.co.in