Misc: In 1849 ---------- becomes a constitutional monarchy.?

Questions

Roads on which trains of freight & passenger cars, drawn by locomotives, travel on tracks formed by pairs of parallel metal rails (locomotive)?

Robert Baden-Powell founded this group in 1907?

Rock, the original composition & texture of which has been altered by heat & pressure deep within the earths crust?

what is equivalent of cc?

what is equivalent of clx?