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Chemistry

Chemistry
The value of Avogadro Number is

6.023 × 1023
6.023 × 1022
6.023 × 1024
6.023 × 1025

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Chemistry
Which among the following is used as a catalyst in the production of high octane fuels?

H2SO4
HNO3
HF
HCl

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Chemistry
The chemical formula of the laughing gas is

NO2
NO
N2O
N2O3

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Chemistry
Which of the following is the correct sequence of countries in terms of maximum carbon dioxide emission?

USA, India, China, European Union
China, India, European Union, USA
China, USA, European Union, India
European Union, China, USA, India

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Chemistry
Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as

Synergism
Antagonism
Independent
Additives

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Chemistry
Gas released during Bhopal tragedy was :

Sodium isothiocyanate
Methyl isothiocyanate
Ethyl isothiocyanate
Potassium isothiocyanate

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