ask for vs pass on

ask for and pass on both are verbs.

Word	Noun	Adjective	Verb	Adverb
ask for	No	No	Yes	No
pass on	No	No	Yes	No

As verbs, pass on is a hypernym of ask for; that is, pass on is a word with a broader meaning than ask for:

Other hypernyms of ask for include communicate, pass, pass along, put across.

ask for (verb)	pass on (verb)
express the need or desire for	transmit information
increase the likelihood of	cause to be distributed
	move forward, also in the metaphorical sense
	give to or transfer possession of
	place into the hands or custody of
	transmit (knowledge or skills)
	refer to another person for decision or judgment