Question

One mole glucose gives 340 kJ energy. A lectures needs 6800 J energy of teach his classes per day. How many grams glucose he needs per day ?

Answer 1

Answer:

Correct option is

D

150 g

For walking 1 km the man needs 150KJ of energy. To walk 5 kms he needs 150×5=750 KJ energy. If only 30% of energy is available for muscular work, the total energy needed will be

30

750

×100=2500KJ1 mole of glucose produces 3000 KJ. Then for producing 2500 KJ, 5/6 mole of glucose =

6

5

×180=150 gms of glucose will be needed (assuming the molecular weight of glucose=180 gms)