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Gaseous Exchange in Plants

In the proces...

Question

In the process of respiration in plants, 180 gms of sugar plus 192 gms of oxygen produce

Large amount of

C O_{2}

, no water and no energy

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132 gms of

C O_{2}

, 54 gms of water and 337 kcals of energy

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264 gms of

C O_{2}

, 108 gms of water and 674 kcals of energy

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528 gms of

C O_{2}

, 216 gms of water and 1348 kcals of energy

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Solution

The correct option is B 264 gms of $C O_{2}$ , 108 gms of water and 674 kcals of energy
Reaction of respiration is
$C_{6} H_{12} O_{6} + 6 O_{2} \to 6 C O_{2} + 6 H_{2} O + 674 k c a l$
In this reaction considering molecular weight of each elements we get
$C_{6} H_{12} O_{6} = 6 t i m e s$ 12+ 12 times 1+ 6 times 16 $=$ 180 gm
$O_{2} = 6 t i m e s$ 32 $=$ 192 gm
Now we consider products of this reaction i.e., 6 $C O_{2}$ and $6 H_{2} O$
$6 C O_{2} = 6 (12 + 32) = 264 g m$
$6 H_{2} O = 6 (2 + 16) = 108 g m$

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