Can you identify if it's a murder or a suicide ?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

Rearrange the letters in "new door" to make one word.

What do you answer even though it never asks you questions?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Using eight eights and addition only, can you make 1000?

Can you solve below mathematical equation?

2^1234 - 2^1233

What is the word or phrase?