When $Mg$ burns in air,it produces

For the reaction $SnO_{2(s)} + 2H_{2(g)} \rightleftharpoons 2H_2O_{(g)} + Sn_{(l)}$,calculate $K_p$ at $900 \ K$ where the equilibrium steam-hydrogen mixture was $45\%$ $H_2$ by volume.

Which of the following pairs of transition metal ions have the same calculated values of magnetic moment?

What is the mole ratio of benzene $({P_B}^0 = 150 \ torr)$ and toluene $({P_T}^0 = 50 \ torr)$ in the vapour phase if the given solution has a vapour pressure of $120 \ torr$?

Which of the following is a natural polymer?

$A$ conductor of resistance $3 \Omega$ is stretched uniformly until its length is doubled. The wire is now bent in the form of an equilateral triangle. The effective resistance between the ends of any side of the triangle in ohms is