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Chemistry

Chemistry
Select the one which is not a mixture :

Air
LPG
Gasoline
Distilled water

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Chemistry
In organic compounds, nitrogen is estimated by

Carius method
Victor-Meyer's method
Dumas method
Liebig's method

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Chemistry
The addition of gypsum to portland cement helps in :

Increasing the strength of cement
Rapid setting of cement
Reduction in the cost of cement
Preventing rapid setting of cement

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Chemistry
The buffer action of blood is due to the presence of

CI– and [HCO3]–
[HCO3]– and H2CO3
CI– and [CO3]2–
HCI and NaCI

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Chemistry
Vulcanized rubber contains sulphur

0.02
7-9%
3-5%
10-15%

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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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