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Chemistry

Chemistry
Gold dissolves in

Nitric acid
Aqua-regia
Hydrochloric acid
Acetic acid

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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
None of these
Smog
Green house effect

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Chemistry
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?

Cement
Gun powder
Paint
Glass

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Chemistry
In a period from Li to F, ionisation potential

Increases
Remains same
Decreases
Cannot be predicted

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Chemistry
Which one is the most dense liquid from the below

None of these
Water
Gasolin
Choloform

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Chemistry
Which one of the following species has the highest bond order, shortest bond length and maximum bond strength

O-22
O2
O-2
O+2

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