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Chemistry

Chemistry
The gas which emits from rice field is

Ethane
Methane
All of these
Nitrogen

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Chemistry
The process of removing calcium and magnesium from hard water is known as

Filtration
Flocculation
Water softening
Sedimentation

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Chemistry
Type metal used in printing press is an alloy of

Lead and antimony
Lead and zinc
Lead and bismuth
Lead and copper

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Chemistry
The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

cineole
engenol
limonene
geraniol

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Chemistry
PH value between 6.5-7.5 makes the soil

None of these
Neutral
Acidic
Basic

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Chemistry
The depletion in Ozone layer is caused by ________ .

Methane
Nitrous oxide
Carbon dioxide
Chlorofluorocarbons

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