Chemical Bonding and Molecular Structure Test 51

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Hybridization is the measure to express the molecular shapes reasonably. Hybridization, although theoretical, but is highly correlated with molecular shapes or inter orbital angles. If there is any departure in geometry in apparent departure in hybridization can be observed and the following characteristic relationship is the easiest way to interpret that departure. Any hybrid orbital made by s and p-orbitals is characterized by the following relationship.

$$ f_s = \dfrac {1}{i + 1}$$ or $$f_p = \dfrac {i}{i+1}$$ and $$i =\dfrac {f_p}{f_s} $$

For $$ sp^3, i= 3$$ and $$sp^2, i=2 $$ for an orbital, $$ f_s + f_p = 1 $$ while all the s-p hybrids of gein atom must satisfy the condition.

$$ \sum { f_x} = 1.00 $$

d and the inter orbital angle between two equivalent ( same $$f_s$$ and same $$f_p$$ ) hybrid orbitals is given by

$$ cos \theta = \dfrac {-1}{i} $$

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VSEPR theory suggest a small departure from $$ 109^0 28'$$ for $$ NH_3 $$ molecule. The H-N-H bond angle has been found to be $$ 107^0 $$ what kind of hybrid orbital will be occupied by the non -bonding pair of electron?

Chemical Bondin...

Question 1

$$CH_2= CH - C = \overset{H}{\overset{|}{C}} - C \equiv N$$

$$CH \equiv C - CH = C = CH-CH_3$$

$$N \equiv C - \overset{H}{\overset{|}{C}} - \underset{H}{\underset{|}{C}} - CH - CH_3$$

Question 2

$$C_{2}H_{6}$$

$$C_{2}H_{5}Cl$$

$$C_{2}H_{2}Cl_{2}$$

$$C_{2}H_{4}$$

Question 3

If molecule has any polar bond, then it is always polar

Solubility of noble gases increases in water down the group when their size increases because London dispersion force increases

First ionization energy of Al is greater than that of gallium

$$ XeF^{ \oplus}_5 $$ has disorted octahedral geometry

Question 4

$$1$$

$$1.5$$

$$2.5$$

$$3$$

Question 5

Both have $$3\ C -4e^-$$ bond

Both have $$ sp^3 $$ hybridization for the central atom

Both are non planar

All are correct

Question 6

$$ SF_4 $$

$$ SiF_4 $$

$$ XeF_4 $$

$$ BF_4^- $$

Question 7

bond angle

hybridisation of central atom

planarity

bond length

Question 8

$$ sp^3 $$

$$ sp^{3.4} $$

$$ sp^{2.13} $$

$$ sp^2 $$

Question 9

$$ H_2S_2O_6 $$

$$ H_2S_2O_8 $$

$$ H_2S_2O_3 $$

$$ H_2S_4O_6 $$

Question 10

$$ [ ClO^-_3] $$

$$ XeF_4 $$

$$ SF_4 $$

$$ [ I^-_3] $$

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