Just a second 1

Hydration of the carbonyl group is least effective in the case of

(A)chloral

(B)glyoxal

(C)acetaldehyde

(D)

ANS D

Ans A

A certain volume of ethylene after partial reduction with hydrogen in presence of a metal catalyst required 10% more oxygen for complete combustion than it would have originally. Calculate the ethane: ethylene ratio after partial reduction.

3 : 2

2 : 3

7 : 6

6 : 7

1 is clearly b

q3 hofmann elimination answer A

ΔG<0 is irreveresible

ΔG≈0 reversible

ok fine

Any tries for 2 n 4 th qs ????

I think hydration is least effective in case of chloral...it would cause S_N instead of nucleophilic addition.

FOR 4 ITS COMING TO BE 3:2 ?????????

C2H4 INITIALLY LET a moles

C2H4→→C2H6
a(1-x) ax

C2H4+ 3O2→→2co2 +2H2O

C2H6 + 3.5O2→→2co2 +3H2O

total moles of oxygen used after partial reduction=3a+0.5ax(i.e 3a(1-x)+3.5ax)

now 0.5ax=(10/100)*3a

so x=3/5
reqd. ratio = x/1-x
that is 3:2

Q1........

if steeper the curve, higher is the activation energy, slower is the rate of reaction.
Therefore, ans has to be either of c or d, but c n d r lukin identical.....aren't they?

if v luk at de graph c n d.......E_a of reactant and E_a of intermediate is nearly same, indicates that the rate of forward reaction is equal to rate of backward reacion....... means reation is at equilibrium.......

Q2.......

ketones are less reative than aldehydes.........

Q4......

I think rocky is rite.......