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Chemistry

Chemistry
What is used in storage batteries?

Tin
Zinc
Copper
Lead

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Chemistry
The natural source of hydro-carbon is

Carbohydrates
Biomass
Crude oil
Coal

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Chemistry
Trinitrotoluene is

Used to fuse two metals
Used as an explosive
Used as an abrasive
Used to melt metals

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Chemistry
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

ozone
methane
helium
oxygen

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Chemistry
Which method will be employed to test the hardness of water?

None of these
Distillation
Formation of lather with soap
Boiling

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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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