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Chemistry

Chemistry
________ is used for making vinegar.

Acetic acid
Tartaric acid
Oxalic acid
Malic acid

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Chemistry
Dry ice is the solid form of :

Water
Air
Nitrogen
Carbon di–oxide

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Chemistry
Which of the following pollutants is main product of automobile exhaust ?

Hydrocarbons
CO
NO
CO2

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Chemistry
Among the following, which is always found in free-state in nature?

Gold
Silver
Sodium
Copper

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Chemistry
CNG used in automobiles to check pollution, mainly consists of

H2
CO2
N2
CH4

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Chemistry
For a spontaneous chemical process, the free energy change is

Negative
Positive
Depends on whether the reaction is exothermic or endothermic
Zero

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