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Chemistry

Chemistry
Vinegar made by fermentation from cane sugar contains

Acetic acid
Citric acid
Palmitic acid
Lactic acid

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Chemistry
The percentage of oxygen in air is approximately

0.01
0.78
1
0.21

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Chemistry
Which of the following methods is used in determining the number average molar mass of a macromolecule

Sedimentation equilibrium
Light scattering
Viscosity
Osmotic pressure

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Chemistry
Cement containing excess amount of lime

Is quick setting
Cracks during setting
Becomes more strong
Is slow setting

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Chemistry
The gas which turns into liquid at the lowest temperature among the following is

Nitrogen
Oxygen
Hydrogen
Helium

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Chemistry
The minimum energy required for an effective collision is

Activation energy
Threshold energy
Free energy
Internal energy

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