If the internal energy of an ideal gas decreases by the same amount as the work done by the system,the process is

If $A = \{1, 2, 3\}$ and $B = \{1, 4, 6, 9\}$,and $R$ is a relation from $A$ to $B$ defined by '$x$ is greater than $y$'. The range of $R$ is

The decreasing order of bond dissociation energies of $C-C$,$C-H$,and $H-H$ bonds is:

In which of the following reactions,$H_2O_2$ acts as a reducing reagent?

If the image of $\left(\frac{-7}{5}, \frac{-6}{5}\right)$ in a line is $(1, 2)$,then the equation of the line is

$A$ light string passing over a smooth light pulley connects two blocks of masses $m_1$ and $m_2$ (vertically). If the acceleration of the system is $g / 8$,then the ratio of the masses $m_1 : m_2$ is