The correct order of decreasing second ionisation enthalpy of $Ti(22), V(23), Cr(24)$ and $Mn(25)$ is
$Mn > Cr > Ti > V$
$Ti > V > Cr > Mn$
$Cr > Mn > V > Ti$
$V > Mn > Cr > Ti$
The element the usually does $NOT$ show variable oxidation states is
Steel is manufactured from
Bullet-proof steel alloy is prepared by using
$Cu(CN)_4^{2 - }$ is colourless as it absorbs light in
Which of the following has lowest percentage of carbon