Two cylinders, both fitted with frictionless pistons, are filled with mixtures of He and Ar gases. In the first cylinder, the masses of He and Ar are $m_1$ and $m_2$, respectively. In the second cylinder, the masses of He and Ar are $m_2$ and $m_1$, respectively. The molar mass of Ar is 10 times the molar mass of He. The external pressure applied by the piston on the first cylinder needs to be 5 times that on the second cylinder so that the volume of the gas mixtures in both the cylinders are equal at the same temperature. Assuming He and Ar behave like ideal gases, the value of $(m_1/m_2)$ is _______.

The total number of all possible isomers for the square planar complex with formula

$\mathrm{K[M(NCS)(NO_2)(gly)]}$ is ______.

($\mathrm{M} = \text{metal ion and } \mathrm{gly} = \mathrm{NH_2CH_2COO^-}$)

The sum of total number of carbonyl groups ($> {C}= {O}$) present in the major products X and Y in the following reactions is _____.

Treatment of buta-1,3-diyne with NaNH₂ (2 equivalents), followed by reaction with excess of trans-CH₃-CH=CH-CH₂-Br gives X as the major product. The maximum number of carbon atoms that are collinear (in a straight line) in X is _____.