In respiration from 180g of glucose which of the following is formed?
(a) 264gm CO2+190gm H2O+391 Kcal
(b) 264gm CO2+108gm H2O+686 Kcal
(c) 390gm CO2+108gm H2O+686 Kcal
(d) 390gm CO2+ 264gm H2O+391 Kcal

Audio Explanation:


(b) In respiraion, from 180gm of glucose 264 gm CO2+ 108gm H2O + 686 Kcal energy is formed.

C6H12O6 + 6O2            6CO2 + 6H2O Kcal

Atomic weight of C =12, H = 1, O=16

C6H12O6  = (12 ×6 + 12 × 1 + 16 × 6)                  = 180 gm    6CO2    = 6(12 + 16 × 2)                  = 264 gm    6H2O    =6(2 ×1 + 16)                  = 108 gm            From 1 molecule or 180 gm of glucose, through respiration, 264 gm CO2, 108gm H2O and 686 Kcal energy are formed.

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