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Chemistry

Chemistry
Atoms having the same number of protons but different number of neutrons are called :

Cations
Anions
Higgs-boson
Isotopes

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Chemistry
In vulcanisation process, rubber can be hardened by adding

Sulphur
Silicon
Nitrogen
Alcohol

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Chemistry
Physico-chemical characteristics of water in water sources undergo changes due to

Effluents
Aquatic macrophytes
Evapotranspiration
Auatic fungi

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Chemistry
The most abundant element by number in the living system is :

Nitrogen
Hydrogen
Oxygen
Carbon

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Chemistry
Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ?

Alkalinity
Hardness
Acidity
Eutrophication

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Chemistry
The filter over which sewage is sprinkled is called as

Intermittent sand filter
Percolating filter
Contact bed
Trickling filter

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