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Chemistry

Chemistry
The chemical formula of the laughing gas is

N2O3
NO2
N2O
NO

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Chemistry
The gas used to dilute oxygen for breathing by deep sea divers is:

Neon
Nitrogen
Argon
Helium

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Chemistry
Highly toxic gas which causes headache, visual difficulty, paralysis and even death is

O3
All of these
CO2
CO

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Chemistry
0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by

7
6
3
4

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Chemistry
Which of the following is a renewable source of energy ?

Geothermal powder
Coal
Uranium
Natural gas

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Chemistry
Food cans are coated with tin and not with zinc because

Zinc is costlier than tin
Zinc is more reactive than tin
Zinc has a higher melting point than tin
Zinc is less reactive than tin

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