What does $R.Q.$ stand for?

Respiratory quotient $(R.Q.)$ is defined as:

The substance whose $RQ$ is < one is:

The $R.Q.$ of a plant organ depends upon the nature of the substrate which is

The $R.Q.$ (Respiratory Quotient) for glucose is:

What is the value of $RQ$ of castor seeds,if the imaginary values of Ganong's respirometer are as follows:
$(i)$ First rise of saline = $10 \, ml$
(ii) Second rise of saline after adding $KOH = 30 \, ml$