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Chemistry

Chemistry
Which one of the following is most acidic

MgO
Al22O3
Na2O
CaO

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Chemistry
An important green-house gas other than methane being produced from the agricultural fields is

Ammonia
Sulphur dioxide
Arsine
Nitrous oxide

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Chemistry
Urea is a

Nitrogenous fertilizer
Phosphatic fertilizer
Sodium fertilizer
Potassium fertilizer

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Chemistry
Tar roads get damaged if there is

No maintenance
Stagnation of water on road
Heavy traffic
No sloping

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Chemistry
The gas produced in marshy places due to decomposition of vegetation is

Methane
Sulphur dioxide
Carbon dioxide
Carbon monoxide

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Chemistry
Concentration of a material which is lethal to 50% animal is called

LC50
ADI
LD50
NOAEL

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MORE MCQ ON Chemistry

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