well i will try out the 27th one
look firstly 2
F and 2
F are in series = Ceq=1
F
Now it is in parallel to 1
F=Ceq=2
F which is inturn in series with 2
F capacitor=1
F
now it is again in paralell with 1
F=2
F
finally it is in series with 2
F
Therefore Ceq=1
F ............................Ans
Plz correct me if i am wrong
Rate if correct