Which of the following statements is/are false? P. Linotype alloy contains 86% Pb, 11% Sb and 3% Sn and is used in printing processes. Q. Wood’s metal is composed of 50% Pb, 25% Sn and 25% Bi and is used in soldering. R. Monotype metal contains 78% Pb, 15% Sb and 7% Sn.

P. Linotype metal alloy contains 86% Pb, 11% Sb and 3% Sn and has been used for over five centuries in printing processes. This alloy has low melting point, good stability and undergoes minimum contraction on solidification. Q. Wood’s metal is composed of 50% Pb, 25% Sn, 12.5% Cd and 12.5% Bi. This alloy has melting point of 80 ^oC and is used in soldering. R. Monotype metal contains 78% Pb, 15% Sb and 7% Sn.