Yes! Sweet Chestnut trees are deciduous because they loose their leaves in the winter. Whereas evergreen trees i.e. pine don't loose their leaves in the winter!
Generally, yes. The ash is not one tree or even one genus of tree, but is four. Most are deciduous, but some of the subtropical species are evergreen. A link is provided to the Wikipedia article on the ash tree.
Conkers come from the horse chestnut tree (Aesculus hippocastanum), which is a deciduous tree known for its large, distinctive leaves and spiky green fruits.
Horse chestnut
They are, believe it or not, evergreen!
evergreen tree
The American chestnut tree, Castanea dentata, is a deciduous tree.
Evergreen
The Rangiora tree is evergreen.
the Juniper Tree is not deciduous. it is an evergreen.
It's a deciduous tree!
Evergreen.
Deciduous