The mass number of a nucleus is

always less than its atomic number

the sum of the number of protons and neutrons present in the nucleus

always more than the atomic weight

a fraction

Correct Answer : the sum of the number of protons and neutrons present in the nucleus

Published On : July 3, 2020

Recent Updates in Chemistry - General Knowledge Questions

Q .

Freons cause great environmental damage. They are

Mixed chlorofluoro-hydrocarbons

Mixed sulphur gases

Mixed carbon gases

Free gases

Correct Answer : Mixed chlorofluoro-hydrocarbons

Published On : June 12, 2021

Category : Chemistry

Q .

When ants bite, they inject

Stearic acid

Formic acid

Methanol

Glacial acetic acid

Correct Answer : Formic acid

Published On : June 12, 2021

Category : Chemistry

Q .

The cycling of elements in an ecosystem is called

Chemical cycles

Geological cycles

Geochemical cycles

Biogeochemical cycles

Correct Answer : Biogeochemical cycles

The biogenetic nutrients are essential elements required by organisms for their body-building and metabolism which are provided by earth and returned to earth after the death of organisms and/or through excreta of animals. So, the correct answer is 'Biogeochemical cycle'

Published On : June 12, 2021

Category : Chemistry