$CH_3COOH \xrightarrow{LiAlH_4} A$
$A + CH_3COOH \xrightarrow{H_3O^{+}} B + H_2O$
In the above reactions '$A$' and '$B$' respectively are

In an $n$-type semiconductor,the Fermi energy level lies

Which of the following methods is used to remove hardness from water?

$A$ parallel plate capacitor is charged to a potential difference of $100\ V$ and disconnected from the source of emf. $A$ slab of dielectric is then inserted between the plates. Which of the following three quantities change?
$(i)$ The potential difference
$(ii)$ The capacitance
$(iii)$ The charge on the plates

The number of gram atoms of oxygen present in $0.3 \, mole$ of $(COOH)_2 \cdot 2H_2O$ is

At room temperature,a $P-$ type semiconductor has