Atoms and Molecules — Science STD 9 — Question

A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called:

Name a physical quantity that remains constant in a uniform circular motion:

Which of the following is unit of power?

A particle P has 18 electrons, 20 neutrons and 19 protons. This particle must be:

A molecule is _________?

A and B are two objects with masses 6kg and 34kg respectively. Then,

The particles present in the nucleus of an atom are :

The speeds of sound in four different media are given below. Which of the following is the most likely speed in m/s with which the two under water whales in a sea talk to each other when separated by a large distance?

The isotopes of an element have different number of:

Area under a speed-time graph gives: