The role of haemoglobin is to

If the coefficient of $x$ in the expansion of $\left(x^2+\frac{k}{x}\right)^5$ is $270$,then $k$ is equal to

$A$ mercury drop of radius $1 ~cm$ is sprayed into $10^6$ drops of equal size. The energy expended in joules is (Surface tension of mercury is $460 \times 10^{-3} ~N/m$)

At the temperature $T$ $(K)$ for the reaction $X_2O_{4(l)} \rightarrow 2XO_{2(g)}$,$\Delta U = x \ kJ \ mol^{-1}$ and $\Delta S = y \ J \ K^{-1} \ mol^{-1}$. The Gibbs energy change for the reaction is (Assume $XO_2$ is an ideal gas):

From the following statements,select the wrong one:

When glucose reacts with bromine water,the main product is: