What number should come in place of the question mark below?

Solve this riddle by finding the odd one out from the rest.

I have an eye but still cannot see.

Who am I?

I purchased an awesome ice cream cone having 5 different flavour scoops.
Five flavours are pistachio, mint-chip, strawberry, marshmallow, and raspberry

I will give u some clues so that you can figure out the order of flavours from bottom to top.
1. The bottom flavour of the cone has 10 letters.
2. The marshmallow scoop is between the pistachio and the mint-chip scoop.
3. marshmallow is the raspberry scoop but below the mint-chip scoop.

So can you figure out the flavour of ice cream in order from bottom to top?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

Can you find the dog hidden in a group of pandas?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

What does below chemistry rebus means?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?