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Chemistry

Chemistry
The percentage of nitrogen present in ammonium sulphate is :

0.25
0.18
0.27
0.305

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Chemistry
Oxygen which is vital for life is a product of photosynthesis and comes from

Carbonates from soil
Water
Oxides of mineral elements
Carbon dioxide

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Chemistry
When a nutrient like fertilizer is present in large quantities in a water bodies, plants grow and decay in large numbers because of suffocating of pond that does not leave enough oxygen needed to support life. This type of pollution is called

Eutrophication
Smog
Green house effect
None of these

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Chemistry
The coating of a thin layer of zinc on steel or iron objects is known as

Hot dipping
Electroplating
Tinning
Galvanising

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Chemistry
The new strain of bacteria produced by biotechnology in alcohol industry is

Saccharomyces cerevisiae
Escherichia coli
Pseudomonas putida
Bacillus subtilis

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Chemistry
Saline soil contains

Hard rocks
None of these
Lot of moisture
High concentration of salt

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MORE MCQ ON Chemistry

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