What is the phase difference between voltage $V$ and current $I$ in an $AC$ circuit containing only a capacitor?

In a circuit containing an inductance of zero resistance,the $e.m.f.$ of the applied $ac$ voltage leads the current by ......$^o$

Capacitive reactance of a capacitor in an $AC$ circuit is $6 \ k\Omega$. If the same capacitor is connected to an $AC$ source of double the frequency,the capacitive reactance will become

Assertion : No power loss is associated with a pure capacitor in an $AC$ circuit.
Reason : No current is flowing in this circuit.

In a circuit consisting of a capacitance and a generator with alternating emf $E_{g}=E_{g0} \sin \omega t$,$V_{C}$ and $I_{C}$ are the voltage and current. The correct phasor diagram for such a circuit is:

In a circuit containing a pure resistor connected to an $AC$ source,