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Jee 2014 Booklet2 Hwt Chemical Bonding

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(1)

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 :

(2)

1. In CH2 CHCH2CCH, the C2C3 bond involves the hybridization of the type :

(A) spsp2 (B) sp3sp3 (C) spsp3 (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 :

(3)

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) CNand O2(D) CO and O2

10. Which of the following hydrogen halides has the lowest value of dipole moment ?

(4)

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

(5)

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

22

5. In H O3  the formal charge on the oxygen atom is :

(A) +1 (B)

1

(C) zero (D) +2

6. 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 NO22(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

References

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