Racemic mixture is obtain in which substrate when it is treated with `CH_(3)OH`

Which of the following products is obtained in Highest yield when 2-bromopentane is treated with CH_(3)CH_(2)O- Na^(+) ?

In which case racemic mixture is obtained on mixing its mirror images in 1:1 molar ratio ?

A racemic mixture of 2- Chloropropanoic acid is treated with excess of (+)-2- Butanol. The reaction can be represented as follows : CH_(2)-underset((pm))underset(Cl)underset(|)(CH)-COOH+CH_(3)-underset(" "(+)" excess")underset(OH)underset(|)(CH)-CH_(2)-CH_(3) rarr CH_(3)-underset(Cl)underset(|)(CH)-COO-overset(" "CH_(3))overset(|)(CH)-CH_(2)-CH_(3)+CH_(3)-underset((+)" (Left unreacted)")underset(OH)underset(|)(CH)-CH_(2)-CH_(3)

A racemic mixture of 2- Chloropropanoic acid is treated with excess of (+)-2- Butanol. The reaction can be represented as follows : CH_(2)-underset((pm))underset(Cl)underset(|)(CH)-COOH+CH_(3)-underset(" "(+)" excess")underset(OH)underset(|)(CH)-CH_(2)-CH_(3) rarr CH_(3)-underset(Cl)underset(|)(CH)-COO-overset(" "CH_(3))overset(|)(CH)-CH_(2)-CH_(3)+CH_(3)-underset((+)" (Left unreacted)")underset(OH)underset(|)(CH)-CH_(2)-CH_(3)

which of the following procucts is formade when benzaldehuyde is treated with CH_(3)MgBr and the addition product so obtained is subjected to acid hydrolysis?