Statement A: Hydrogen is a fuel of energy.Sta | vedclass

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(B) Statement $A$ is true because hydrogen is considered a clean and efficient fuel source.Statement $R$ is also true because certain photosynthetic m

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$A$ and $R$ are both true. $R$ is the correct explanation of $A$.

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(B) Statement $A$ is true because hydrogen is considered a clean and efficient fuel source.Statement $R$ is also true because certain photosynthetic microorganisms,such as cyanobacteria and green algae,can produce hydrogen gas $(H_2)$ through biological processes by capturing solar energy and converting it into chemical energy stored in the bonds of $H_2$.Since the production of hydrogen by these microorganisms is a primary reason why hydrogen is being explored as a sustainable biological fuel,$R$ provides the correct explanation for $A$.

Column-$I$	Column-$II$
$1.$ Silage	$a.$ Measure of water pollution level.
$2.$ Flocs	$b.$ Cattle feed.
$3.$ Biogas	$c.$ Bacteria associated with fungal filaments in water.
$4.$ $BOD$	$d.$ Anaerobic metabolism of organic waste.

Statement $A$: Hydrogen is a fuel of energy.
Statement $R$: Photosynthetic microorganisms produce $H_2$,which are capable of converting solar energy into chemical energy.

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Dosa and Idli are fermented preparations of rice and black gram. The fermentation is done by:

Find the mismatched pair.

Match the following columns:
Column-$I$ Column-$II$
$1.$ Silage $a.$ Measure of water pollution level.
$2.$ Flocs $b.$ Cattle feed.
$3.$ Biogas $c.$ Bacteria associated with fungal filaments in water.
$4.$ $BOD$ $d.$ Anaerobic metabolism of organic waste.

What is the importance of bacteria?

Select the mismatched option from the following.

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Statement $A$: Hydrogen is a fuel of energy.Statement $R$: Photosynthetic microorganisms produce $H_2$,which are capable of converting solar energy into chemical energy.