1.
a) There is a carrot.
b) There is some carrots.

2.
a) There is any whisky.
b) There is some whisky.

3.
a) There aren't some mushrooms.
b) There aren't any mushrooms.

4.
a) There isn't much ham.
b) There isn't many ham.

5.
a) There is a lot of water.
b) There is much water.

6.
a) Are there much peppers?
b) Are there many peppers?

7.
a) There are lots of people here.
b) There are much people here.

8.
a) There's lots of lettuce.
b) There are lots of lettuce.

9.
a) Is there much wine?
b) Is there many wine?

10.
a) There is much snow.
b) There is a lot of snow.