Questions

In a hydrogen atom, an electron moves in an orbit of radius 5.0 x 10-11 m with a speed of 2.2 x 106 m/s. What is the equivalent current? (Electronic charge = 1.6 x10-19 C)

Which of the following elements has the lowest melting point?

The predominant stage of the life cycle of a moss is the gametophyte which consists of two stages. The second stage is the ___________ stage.

____ is not an allotrope of carbon.

Which of these rivers do not flow through Punjab?

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

Discretion is the greater part of valour

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

to kill someone by covering their nose and mouth so that they suffocate

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.

He is now very old, yet grandfather still is the _______________ head of my extended family.