SOLUTION
Smaller the bond angle. greater is the resultant dipole moment 

The dipole moment of 2 dipoles inclined at an angle θ is given by,

μ =√ (x²+y²+2xycosθ?)

cos90=0

∴   The dipole moment is maximum for θ=90⁰

SOLUTION

Vinyl chloride (CH2=CHCl) is unreactive in nucleophilic substitution reaction due to resonance.

In vinyl chloride, the lone pair of electrons on chlorine is in resonance with the C-C double bond, because of which there is partial double bond character in C-Cl bond

SOLUTION

Nucleophilic substitution bimolecular (S_N 2) prefers less stericallv hinciered site to attack. Lesser the steric hindrance faster the S_N 2 reaction. So ease of reaction is 1^o > 2^o > 3^o  

S_N  2 involves inversion of configuration stereo, chemically.  Since, 1o alkyl halides are prone to S_N 2 reactions, therefor CH₃Cl undergoes complete strerochemical inversion

Solution

Eutrophication is the process of enriching water bodies with phosphates like nutrients. It supports the abnormal growth of algae & the lakes and ponds become marshy.
As the algae increases, it consumes more DO and therefore the levels of DO decreases.

When methane gas is treated with chlorine in the presence by sunlight, one hydrogen of methane replaced by the chlorine atom and forms methyl chloride. The mechanism involved in this reaction is free radical mechanism. So it is an example of free radical substitution reaction.

Solution

Negative reaction with 2, 4- dinitrophenylhydrazine indicates absence of aldehydic and ketonic group,

while negative reaction with metallic sodium indicates absence of an alcoholic group

hence the organic compound, C₃H₆O is CH₂ = CHOCH₃

SOLUTION