Which letter cluster will replace the question mark (?)

An element "X", having atomic number 16. gains two electrons to form an anion X. What will be the atomic

number of 'X' in the anion?

A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments –

Which organ in the human body is primarily responsible for filtering blood?

A car travels 150 kilometers in 3 hours. What is its average speed?

The red colour of onion is caused by the presence of which pigment?

Which of these is not a function of proteins?

Which of the following is an example of symbiosis?

The SI unit of surface tension is:

Supersonic speed is speed greater than the speed of sound (in air at sea level) that is to say around______ miles/hour. 

What is the formula for calculating speed?