Hydrogen Test -...

The amount of $$ H_{2}O_{2} $$ present in 1 L of 1.5 $$ NH_{2}O_{2} $$ solution is 

Metals of groups 7, 8 and 9 do not from metallic hydrides. This is termed as

What is the Boiling point of water and which states of $$H_2O$$ exist at the boiling temperature of the water?

The structure of $$ H_{2}O_{2} $$ is

The correct electron dot structure of a water molecule is 

Reaction between the following pairs will produce $$ H_2 $$ except

Which of the following reactions increases production of dihydrogen from synthesis gas?

Only one element of $$----$$ forms hydride.

Elements which show unique nature in the preparation of hydrogen are

When ice melts to form liquid water at $$0^0C$$, there is a contraction in volume. This is due to :