Hydrogen Test -...

A good quality of water will have 
A) high DO
B) high BOD
C) high COD

In water-gas shift reaction, hydrogen gas is produced from the reaction of steam with: 

 High purity $$(>99.95\%)$$ dihydrogen is obtained by: 

A cell contains two hydrogen electrodes. The negative electrode is in contact with a solution of $$10^{-6}$$ M hydrogen ions. The EMF of the cell is 0.118 V at $$25^{\circ}C$$. The concentration of hydrogen ions at the positive electrode is

A solution of $$H_{2} O_{2}$$ is titrated with a solution of $$KMnO_{4}.$$ The reaction is
$$ 2MnO_{4}-+5H_{2}O_{2}+6H^{+}$$
$$ \rightarrow 2Mn^{2+}+5O_{2}+8H_{2}O$$
It requires $$50$$ ml of $$0.1$$ $$ M - KMnO_{4} $$ to oxidize $$10$$ ml of $$ H_{2}O_{2}.$$ The strength of $$ H_{2}O_{2} $$ solution is

Hydrogen can be prepared by mixing steam and water gas at $$673 K$$ in the presence of $$Fe_2O_3$$ and $$Cr_2O_3$$. This process is called: 

 $$H_2$$ gas is usually prepared by the reaction of 

$$H_2O_2$$ is manufactured these days...

Which of the following statement is correct for ionic hydrides?

Which of the following properties of water leads in comparison to $$H_2S$$ and $$H_2Se$$ due to H-bonding?