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Chemistry

Chemistry
In a period from Li to F, ionisation potential

Decreases
Increases
Remains same
Cannot be predicted

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Chemistry
The major harmful gas emitted by automobile vehicles which causes air pollution is

Ozone gas
Methane
Carbon dioxide
Carbon Monoxide

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Chemistry
The depletion of Ozone layer is mainly due to

Volcanic eruptions
Aviation fuels
Radioactive rays
Chlorofluorocarbons

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Chemistry
The items amenable to detection by soft x-rays are

genuine coins from counterfeit coins
lead in bullets
narcotics
contrabands

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Chemistry
PVC is obtained by the polymerisation of

Vinyl chloride
Acetylene
Styrene
Propane

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Chemistry
The total energy of revolving electron in an atom

Will always be positive
Cannot be negative
Can never be positive
Can have any value above zero

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MORE MCQ ON Chemistry

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