Hydrogen Test -...

An excess of acidified solution of $$KI$$ is added to a $$25$$ mL $$H_2O_2$$ solution. The iodine liberated requires $$20$$ mL of $$0.3\ N\ Na_2S_2O_3$$ solution. Calculate the volume strength of $$H_2O_2$$:

Assertion: Reducing power of nascent hydrogen is more than atomic hydrogen.
Reason: Bond energy of hydrogen is maximum.

Hydrolith, a source of hydrogen is :

Excess of $$KI$$ and dil. $$H_2SO_4$$, were mixed in $$50$$ ml $$H_2O_2$$. The $$I_2$$ liberated required $$20$$ ml of $$0.1$$ N $$Na_2S_2O_3$$. Find out the strength of $$H_2O_2$$ in $$g/lit^{-1}$$?

STATEMENT-1: Alkaline earth metals form polymeric hydrides.
STATEMENT-2: Only $$Be$$ and $$Mg$$ among alkaline earth metals forms polymeric hydrides.

Which element forms hydride?

$$20$$ ml of $$H_2O_2$$ after acidification with dil $$H_2SO_4$$. required $$30$$ ml of N/2 $$KMnO_4$$ for complete oxidation. Calculate the % of $$H_2O_2$$ in g/lit.

Which is polymeric hydride?

Which one of the following pairs of reactants does not produce oxygen when they react with each other?

Silicon hydrides are called: