Spot what is wrong here in below Picture?

Which tank will fill first?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

What has many keys but can’t open a single lock?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

What can go up a chimney down, but can’t go down a chimney up?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Make a sentence consisting of three words that have the whole alphabet.