The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

3 billion years

100 years

0.01 minute

13 days

Correct Answer : 0.01 minute

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