Practice Problems 1. Rank the following molecules in order of increasing bond an

Question

Practice Problems 1. Rank the following molecules in order of increasing bond angles: (a) 2. Determine the molecular geometries of the following molecules and NH2Cl; (b) CCI (c)H2S ions: (a) GeH4 (b) PH; (C)H2S; (d) CHCl; (e) NO ()NFs 3* The following molecules contain polar covalent bonds. Which of them are nonpolar molecules and why? (a) CCl, (b) CHCl3; (c) CO2; (d) H2S; (e) SO2; (f) CO; (g) HCN; (h) C2H2 3. What is the hybridization of nitrogen in each of the following ions and molecules? (a) NO2 (b) NO2; (c)N2O; (d) N2Os, (e) N20 4.

Explanation / Answer

1. Ranking of molecules on the basis of increasing bond angle

(a) NH2Cl < (c) H2S < (b) CCl4

2. molecular geometries of,

(a) Tetrahedral

(b) trigonal pyramidal

(c) bent

(d) tetrahedral

(e) trigonal planar

(f) trigonal pyramidal

3. Non polar molecules are,

(a) CCl4 : polarity due to one C-Cl is cancelled by other C-Cl on opposite direction.

(c) CO2 : again linear moelcule, polarity due to C=O cancelled by another C=O in opposite direction

(h) C2H2 : again linear and polarity is cancelled by C-H in opposite direction.

4. Hybridization of N in,

(a) sp

(b) sp2

(c) sp

(d) sp2

(e) sp2

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