When little vanadium is mixed with steel, it becomes
More hard
More tensility
Both $ (a)$ and $(b)$
No effect
What are alloys? Name an important alloy which contains some of the lanthanoid metals. Mention its uses.
Which one of the following metals will not reduce ${H_2}O$
The catalyst used in the hydrogenation of oils is
Mark the steel in which carbon $\%$ is highest
Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.