Keyboard words are not in alphabetical order, Why?

There is something which you can be arrested for attempting but not for successfully completing.

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

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

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?