1. In which of the following compounds are the bond angles close to
90
?(A) PH3 (B) SF6 (C) H S2 (D) All of these
2. Which of the following molecules has the maximum value of bond energy ?
(A) F (g)2 (B) N (g)2 (C) CO(g) (D) HF(g)
3. The species which has a liner structure is :
(A) NO2 (B) NO2 (C) NO2 (D) PbCl2
4. Which of the following has a geometry different from the other three species (having the same geometry) ?
(A) BF4 (B) SO24 (C) XeF4 (D) PH4
5. Which of the following species is isoelectronic with CO ?2
(A) N3 (B) CNO (C) NCN2 (D) All of these
6. In Be the bond order is2
(A) one (B) zero (C) two (D) one- half
7. Which of the following molecules has an S – S bond ?
(A) H S O2 2 8 (B) H S O2 2 7 (C) (SO )3 3 (D) H S O2 2 6
8. The p back bonding occurs between oxygen and :d
(A) phosphorus in P O4 10 (B) fluorine in HFO
(C) nitrogen in N O2 5 (D) carbon inCO2
9. The hybridization and geometry of BrF3 molecules are :
(A) sp d and T – shaped3 (B) sp d and tetrahedral3 2
(C) sp d and bent3 (D) None of these
10. The shape of
NH
3 is very similar to that of :1. In CH2 CHCH2CCH, the C2C3 bond involves the hybridization of the type :
(A) spsp2 (B) sp3sp3 (C) spsp3 (D) sp2 sp3
2. The hybridization of the centre atom will change when :
(A) NH3 combines with H (B) AIH3 combines with H
(C) NH forms3 NH2 (D) SiF froms4 SiCl4
3. The shape of NH2 is like that of :
(A) CS2 (B) SnCl2 (C) NO2 (D) BeCl2
4. In the linear I3 (tri-iodide ion), the central iodine atom contains :
(A) no unshared pair of electrons (B) four unshared pairs of electrons
(C) three unshared pair of electrons (D) two unpaired electrons
5. The benzene molecule contains :
(A) 6 bonds and 3 bonds (B) 12 bonds and 3 bonds
(C) 6 bonds and 6 bonds (D) 9 bonds and 3 bonds
6. In an sp-hybridized carbon atom,
(A) two p orbitals remain unhybridized and one p orbital gets hybridized
(B) all the three p orbitals get hybridized
(C) one p orbital remains unhybridized and two p oribitals get hybridized
(D) None of the above is true
7. Which of the following hybrid orbitals has the highest value of electronegativity ?
(A) sp3 (B) sp2 (C) sp (D) sd2
8. By hybridization, we mean hybridization of :
(A) orbitals (B) electrons
(C) both orbitals and electrons (D) None of these
9. The octet rule is not obeyed in :
1. Which of the following ions has a pseudo-inert-gas configuration?
(A) Zn2 (B) Cu (C) Ag (D) All of these
2. Which of the following statements is incorrect?
(A) A sigma bond has no free rotation around its axis.
(B) Two p orbitals always overlap laterally.
(C) There can be more than one sigma bond between two atoms.
(D) All of these
3. The number of nonbonding electrons in N is2
(A) 4 (B) 10 (C) 12 (D) 14
4. Which of the following compounds is expected to be the most ionic?
(A) PbCl2 (B) PbCl4 (C) CCl4 (D) SiCl4
5. Which of the following pairs can form a compound with the maximum ionic character ?
(A) Na and Cl (B) Cs and F (C) Cs and I (D) Na and F
6. ACaC molecules has2
(A) one bond and one bond (B) one bond and two bonds
(C) one bond and one and a half bonds (D) one bond
7. What would be the hybridization state of the two resulting carbon atoms after the C – C bondC H undergoes heterolytic fission ?2 6
(A) sp2 both (B) sp both3 (C) sp and sp2 3 (D) sp andsp2
8. A simplified alpplication of MO theory to the hypothetical molecule OF would give its bond order as :
(A) 2.0 (B) 1.5 (C) 1.0 (D) 0.5
9. Which of the following pairs have identical values of bond order?
(A) N and O2 22 (B) NO and N 2 (C) CNand O2 (D) CO and O2
10. Which of the following hydrogen halides has the lowest value of dipole moment ?
1. Among the following, the species which has the lowest value of bond angle is :
(A) NO2 (B) NO2 (C) NO2 (D) N O2
2. In which of the following pairs do the molecules have identical shapes ?
(A) SO2 and SO3 (B) SnCl and O2 3 (C) SnCl and XeF4 4 (D) XeO and I3 3
3. Which of the following species is planar and has a bond angle very close to 120 ?
(A) BF3 (B) NO3 (C) CO23 (D) All of these
4. Which of the following elements can form both ionic and covalent bonds ?
(A) Argon (B) Hydrogen (C) Iron (D) Neon
5. In which of the following compounds are the molecules joined by intermolecular hydrogen bonds ?
(A) 4-Nitrophenol (B) 2-Nitrophenol
(C) 2-Nitrobenzoic acid (D) None of these
6. Which of the following molecules is formed without following the octet rule ?
(A) BeCl2 (B) IF7 (C) SF6 (D) All of these
7. Water can form a maximum of :
(A) four hydrogen bonds (B) two hydrogen bonds
(C) one hydrogen bond (D) six hydrogen bonds
8. The N H molecule contains :2 4
(A) 2 unpaired electrons (B) 3 unpaired electrons
(C) 4 unpaired electrons (D) No unpaired electron
9. During the formation of an ionic bond, the cation may achieve :
(A) ns or ns np configuration2 2 6 (B) pseudo noble – gas – configuration
(C) inert-pair configuration (D) All of these configurations
10. In diborane(B H ) , the bond formed between B and B is called :2 6
(A) sigma bond (B) 2-centre 2-electron bond
1. A covalent bond is formed between :
(A) An electronegative element and an electropositive element
(B) An electronegative element and an electronegative element
(C) An electropositive element and an electropositive element
(D) None of these
2. In a P molecule, the P – P – P bond angle is :4
(A) 120 (B) 109 (C) 60 (D) between 60 and 90
3. The total number of covalent bonds present in the NO2 ion is :
(A) three (B) two (C) four (D) six
4. Paramagnetism is observed in :
(A) N2 (B)
O
2 (C) He (D)O
225. In H O3 the formal charge on the oxygen atom is :
(A) +1 (B)
1
(C) zero (D) +26. Which of the following molecules has a square pyramidal structure ?
(A) XeO F2 2 (B) XeOF2 (C) XeO F3 2 (D) XeOF4
7. In the solid state N O , exists as2 5 NO NO2 3. The hybridizations around the N atoms in NO2 and NO3 are, respectively :
(A) sp and sp2 (B) sp and sp3 (C) sp and sp2 3 (D) sp and sp
8. Which of the following pairs of species have identical structures and shapes ?
(A) NO and NO2 2 (B) PCl and BrF5 5 (C) XeF and ICl4 4 (D) XeF and XeO4 4
9. Which of the following ions has resonating structure ?
(A) SO23 (B) PO43 (C) SO24 (D) All of these
10. Which one of the following statements is correct ?
(A) Molecular hydrogen is paramagnetic (B) Molecular nitrogen is paramagnetic