Alkenes undergo electrophilic addition reaction and benzene undergoes electrophilic substitution whereas both proceeds through carbocation intermediate. Explain.

Electrons are available in case of alkanes whereas they are delocalized in case 

of benzene. After attack of electrophile a stable delocalized carboncation is 

formed on benzene ring. Whereas a carbocation which can rearrange is formed 

by addition of electrophile on alkane.

How many 1°, 2° , 3° and 4° carbon atoms are present in the following compounds? (CH3)3C – CH(CH3).CH(CH3)2

Acetic acid dimerised to an extent of 30% in benzene . The observed molecular mass (in gm) is...

How much ice will separate if a solution containing 25 g of ethylene glycol [C2H4(OH) 2] in 100g of water is cooled to 10°C? Kf(H2O) = 1.86 (25.05 g)

The dielectric con stant of H2O is 80. The electrostatic force of attraction between Na+ and Cl–will be.

Water is a polar colvent and have dielectric constant 80. As NaCl is a polar compound and like dissolves like so, forces of attraction between Na+ and Cl- ion will reduce to 1/80 in water.