(i) \[10\] kg is a scalar quantity because it has only magnitude.
(ii) \[2\] meters north-west is a vector quantity as it has both magnitude and direction.
(iii) \[{{40}^{\circ }}\] is a scalar quantity as it has only magnitude.
(iv) \[40\] watts is a scalar quantity as it has only magnitude.
(v) \[{{10}^{-19}}\] coulomb is a scalar quantity as it has only magnitude.
(vi) \[20m/{{s}^{2}}\] is a vector quantity as it has both magnitude and direction.