One of the following is not a vector quantity. This one is :
(a) displacement (b) speed (c) acceleration (d) velocity
One of the following is not a combustible susbtance. This one is :
(a) alcohol
(b) hydrogen
(c) asbestos
(d) chaff
One of the following does not undergo sublimation. This one is :
(a) camphor (b) dry ice (c) silica (d) iodine