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Chemistry

Chemistry
Among the following, carbonate ore of Zinc is

Sphalerite
Calamine
Zincblende
Zincite

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Chemistry
The gas which emits from rice field is

Nitrogen
Methane
All of these
Ethane

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Chemistry
The most abundant metal in the Earth’s crust is

Aluminium
Iron
Copper
Zinc

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Chemistry
The green colour seen in firework displays is due to the chloride salt of :

Barium
Calcium
Sodium
Strontium

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Chemistry
Sour milk contains

Acetic acid
Tartaric acid
Lactic acid
Citric acid

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Chemistry
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

2.05 gram
3.05 gram
5.05 gram
4.05 gram

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