What is so fragile that saying its name breaks it?

Name a key which is hardest to turn.

Next Number in the Series,

5, 16, 49, 104, ?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Decode the movie name from the below picture?

Find the 8 in the below-given Image.

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

Which fur should we be getting from the Lion?

Can you identify the Oscar-winning movie from the rebus below?