Chemistry General Knowledge Questions and Answers: Chemistry GK

The pH scale ranges from 0 to 14.

If pH < 7 then the solution is acidic. If pH > 7 then the solution is alkaline. If pH = 7 then the solution is neutral.

Isobar: Nuclei which have the same mass number (A) but a different atomic number (Z) are called isobar. Even-neutronic: Nuclei having equal number of neutrons are called even-neutronic. For them both atomic number (Z) and mass number (A) are different, but the value of (A – Z) is the same.

J.J. Thomson:

Discovery of electron J. J. Thomson did it in 1897. Hence, option 4 is correct.

An electron is a low-mass and negatively charged particle.

He won the Nobel Prize in 1906 "for his theoretical and experimental investigations on the conduction of electricity by gases."

Reduction is a chemical process that involves the gaining of electrons by an atom.

An atom is made up of three particles, namely neutron, proton and electron. Hydrogen has no neutrons. Every atom has a nucleus that binds one or more electrons around itself.

Soil is an example of a heterogeneous mixture that contains many different elements that are not uniform and the composition of the soil is unevenly distributed.

A hydrogen atom has only one proton, one electron and zero neutrons and the positively charged proton is approximately 1837 times as heavy as the mass of the negatively charged electron.

Camphor and dry ice (solid CO2) sublimation reactions provide common examples.

The number of moles in 36 grams of water will be 2. The atomic number of any element is its molar mass.

The Correct Answer is J Chadwick. The atomic structure consists of protons, electrons, and neutrons. The nucleus of an atom consists of Protons and Neutrons. J Chadwick was not associated with the atomic model while the remaining three associated with the atomic model.