Before Mount Everest was discovered, what was the highest mountain in the world?

I know a nine-letter word having only one vowel.
Do you ?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I am the fastest animal but cannot climb the tree. What am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

What has to be broken before you can use it?