Respiration In Plants Question 12

Question: The R.Q. (Respiratory quotient) of $ C_{39}H_{72}O_6 $ is [CPMT 1992]

Options:

A) 2.71

B) 1.34

C) 0.72

D) 3.250

Show Answer

Answer:

Correct Answer: C

Solution:

$2C _3 9H _{72}O _6 {} + 108O _2 {} \longrightarrow 78CO _2 {} ~ +72H _2O $ \ R.Q.

$=\frac{\text{Volume of }CO _2\text{ evolved}}{\text{Volume of }O _2 \ \text{used up}}\frac{78}{108}=.072 $