Which one of the following is resistant to enzyme action?

Molar heat capacity $(C_p)$ of water at constant pressure is $75 \ J \ K^{-1} \ mol^{-1}$. The increase in temperature (in $K$) of $100 \ g$ of water when $1 \ kJ$ of heat is supplied to it is

$A$ $x : 1$ molar mixture of $He$ and $CH_4$ is contained in a vessel at $20 \ bar$ pressure. Due to a hole in the vessel,the gas mixture leaks out. If the composition of the mixture effusing out initially is $8 : 1$,then the value of $x$ will be

$A$ particle of mass $4 m$ explodes into three pieces of masses $m, m$ and $2 m$. The equal masses move along $X$-axis and $Y$-axis with velocities $4 ms^{-1}$ and $6 ms^{-1}$ respectively. The magnitude of the velocity of the heavier mass is

Which of the following orders is correct for the heat of hydrogenation of these compounds?

The correct order of increasing $s$-character (in percentage) in the hybrid orbitals of the following molecules/ions is :-
$I.$ $CO_3^{2-}$
$II.$ $XeF_4$
$III.$ $I_3^-$
$IV.$ $NCl_3$
$V.$ $BeCl_2$