The bond length of the tetrachlorides for the following Group IV elements follows the order :
GeCl4 > SiCl4 > CCl4
The length of an E–Cl bond in a tetrahedral ECl4 molecule is governed mainly by the covalent radius of the central Group 14 (Group IV) atom. Moving down the group from carbon to silicon to germanium, a new valence shell is added each time, so the covalent radius and the bond length both increase.
Step 1 — Covalent radii: C about 77 pm, Si about 117 pm, Ge about 122 pm. Step 2 — Measured bond lengths: C–Cl in CCl4 is about 1.77 Å, Si–Cl in SiCl4 about 2.02 Å and Ge–Cl in GeCl4 about 2.11 Å. The increase from Si to Ge is smaller than from C to Si because of the poor shielding by the filled 3d subshell in germanium (the d-block contraction), but the trend is still upward.
So the order of bond length is GeCl4 longest, then SiCl4, then CCl4 shortest. The sequence SiCl4 > CCl4 > GeCl4 wrongly places germanium last; SiCl4 > GeCl4 > CCl4 wrongly puts silicon above germanium; and GeCl4 > CCl4 > SiCl4 wrongly makes the C–Cl bond longer than the Si–Cl bond.
GeCl4 > SiCl4 > CCl4 option is correct.
Similar Questions
The hybridization for the complex ion [FeF6]3- and [Fe(CN)6]3- is :
Which of the following diatomic molecules is paramagnetic ?
Size of the d orbitals for Si, P, S and Cl follow the order :
The molecules P4 and CH4 exhibit the same :
The bond order for O2 and the hypothetical molecules N2- and O2+ will follow the trend :
According to CFT, Ni2+ can have two unpaired electrons in :
Which of the following complexes will NOT exhibit ideal octahedral geometry ?
The carbonyl stretching frequency (νCO) for the complexes (i) [Co(CO)4]- (ii) [Ni(CO)4] and (iii) [Fe(CO)4]2- will follow the trend :
The spin only magnetic moment for the complex Hg[Co(SCN)4] is :
The molecular formula for sodium bis (thiosulphato) argentate (I) is :
Important Questions from Mixed Topic (MH-SET)
.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
(ii) Interface
(iii) Nucleus
(iv) Compiler
Codes:
Which of the following are referred to as low level language?
(i) Machine language
(ii) Assembly language
(iii) High level language
(iv) Natural language
Codes:
Match the following:
List I List II (a) New York Public Library (i) Shelv AR (b) Miami University Augmented Research Group (ii) Smart library (c) Oula University Library (iii) Wolf Walk (d) North Carolina State University (iv) Find the future Codes:
Which part of the QR code represents the encoded data?
