A gas occupies $11.2 \mathrm{~dm}^3$ at 105 kPa What is the volume if pressure is increased to 210 kPa ?

For a zero order reaction, $\mathrm{A} \longrightarrow$ product, concentration of A decreases from $1.2 \mathrm{~mol~dm}^{-3}$ to $0.4 \mathrm{~mol~dm}^{-3}$ in 240 second. What is rate constant of the reaction?

What is the volume of oxygen required for complete combustion of 0.25 mole of methane at S.T.P.?

What type of solution the alloy is?