If Ben Nevis was ever a volcano, it has been extinct for thousands of years.
You may be mistaken, there is only one super volcano, or calderas, in Scotland and it has been dead since the time of the continental drift 237 Million Years ago. The Super Volcano is in the area which is known as Glencoe. It was the first Super Volcano discovered when Charles Clough first created the theory.
There are currently studies happening as to whether there is a Super Volcano underneath the area of Loch Ness.
If you mean, is it an active volcano - no it isn't.
Ben Nevis was formed approximately 350 million years ago when a volcano collapsed.See the related Wikipedia link listed below for more information:
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Where is Ben Nevis located
Ben Nivis is the highest peak in the UK
Ben Nevis is 4000 years old.
sir ben and maria nevis
Ben Nevis exposes more than 1 km depth of sections of a dissected caldera volcano that has an associated dyke swarm and has been intruded by concentric plutons. The renowned north face (picture) comprises continuous exposure of dacitic sheets, with breccias and some volcanogenic sediments. Breccias beneath the north face include Dalradian metamorphic basement, which has been interpreted as the caldera floor. However, it is predicted that a considerable thickness of ignimbrites lies at depth beneath the corrie floor at Ben Nevis, although it is possible that this will have been cut by plutonic intrusion(s). As at Etive, further south, Ben Nevis volcanic growth will have included formation of an extensive lava pile extruded via the Ben Nevis Dyke Swarm, probably at least in part prior to caldera volcanism.
Ben Nevis is the tallest mountain in Scotland and also in the whole of the United Kingdom.
There are none actually on Ben Nevis but there is a small one in Glen Nevis..
Ben Nevis is the highest mountain in the United Kingdom.
Ben Nevis is such a short name that there is no need to abreviate it.