Finda phase relation between current and voltage in an a.c. circuit containing a pure capacitance. A pure capacitor blocks directcurrent, why ?

Find a phase relation between current and voltage in an a.c. circuit containing a pure inductor. Why high frequency current can not passthrough a pure inductor easily ?

What is phase difference between the e.m.f. and current is an a.c. circuit contains a pure capacitance?

The phase differnece between the current and the voltage in series LCR circuit as resonance is