Questions

There are 15 protons and 22 neutrons in the nucleus of an element. What is its mass number?

In the following questions a part of a sentence is given in bold, it is then followed by four sentences which try to explain the meaning of the idiom/phrase given in bold. Choose the alternative from the four given below each question which explains the meaning of the phrase correctly without altering the meaning of the sentence
given as question. If none of the sentence explains the meaning of the highlighted phrase, choose option  i.e., “None of these” as your answer choice

We are used to giving benefit of a doubt to people we are closest to, the ones who we know very well. This comes to us naturally as we know for a fact they are good people; and even more - we know they like/ love us so they wouldn't do anything against us.

If the ___________ firm has zero costs or only has fixed cost, the quantity supplied in equilibrium is given by the point where the average revenue is zero.

______ is a strong drug that doctors give to people to make them calm or help them sleep.

What is the reason for formation of Mirage in desert?

The force of friction between two surfaces will increase if:

The given symbol stands for a/an ___ in an electric circuit.

The absolute refractive index of air is