Water chesnuts are water-based and used in savory dishes, so they would ruin the recipe that you are trying to make. Regular chesnuts are a hearty nut, like an almond or a walnut.
No, instead use lime powder
no
baking soda
yes
no
You could use yeast instead of baking powder.
nothing really
you can use cornstarch
if the recipie says to use baking powder you should use that as that is how it is sopose to be used but you may try and use baking soda if you don't have baking powder
Yes. However, if you use baking soda instead of powder, you'll need to include some acid. A teaspoon of lemon juice or using buttermilk instead of regular milk will work.
You can use baking paper instead of ironing sheet for various projects. This can be used for parchment purposes, dyeing and pigmentation purposes.
you could use baking powder but its best to use dry active yeast