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Chemistry

Chemistry
Isobars are lines joining places having equal

Height above sea-level
Pressure
Population
Rainfall

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Chemistry
Which of the following gases is mixed with oxygen for breathing by divers in aqua lungs?

Methane
Hydrogen
Nitrogen
Helium

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Chemistry
What are the number of moles of CO2 which contains 16 g of oxygen?

0.25 mole
0.5 mole
0.4 mole
0.2 mole

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Chemistry
In which of the following states maximum iron ore is found ?

Fe3O4
Fe2O3
FeS2
FeCO3

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Chemistry
Which of the following is not an addition polymer

Polythene
PVC
Polystyrene
Nylon

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Chemistry
Most poisonous pollutant in water is

Phosphate
Detergent
Zinc
Arsenic

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