The bond angle $H-O-O$ in $H_2O_2$ in the gaseous phase is (in $^{\circ}$)

Which of the following metals will not reduce $H_2O_2$?

Match List $I$ with List $II$ and select the correct answer using the codes given below the lists:

$A$. Peroxide	$1$. $C_3O_2$
$B$. Superoxide	$2$. $PbO_2$
$C$. Dioxide	$3$. $KO_2$
$D$. Suboxide	$4$. $H_2O_2$

When $H_{2}O_{2}$ is shaken with an acidified solution of $K_{2}Cr_{2}O_{7}$ in the presence of ether,the ethereal layer turns blue due to the formation of

What is the gas liberated when alkaline formaldehyde solution is treated with $H_2 O_2$?

Hydrogen peroxide in its reaction with $KIO_4$ and $NH_2OH$ respectively,is acting as a