What is the longest word in the dictionary?

What am I?

What is red and smells like blue paint?

You can see it everyday, But cannot touch it at will. What is it?

Replace the question mark with the number below given a simple math problem.

When it's bad luck to meet a black cat?

What is black when you buy it, red when you use it, and gray when you throw it away?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?