1. There isn't any / some chocolate. -> There isn't any chocolate.
2. There are some / any sandwiches. -> There are some sandwiches.
3. There aren't any / an burgers. -> There aren't any burgers.
4. Is there a / any juice? -> Is there any juice?
5. Are there any / a crisps? -> Are there any crisps?
6. There is a / some water. -> There is some water.
7. There's a / some banana and an orange. -> There's a banana and an orange.