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Chemistry

Chemistry
The octane number of zero is assigned to

2-methyl octane
iso-octane
3-methyl octane
n-heptane

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Chemistry
The most abundant element by number in the living system is :

Hydrogen
Carbon
Nitrogen
Oxygen

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Chemistry
PH value between 6.5-7.5 makes the soil

None of these
Basic
Acidic
Neutral

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Chemistry
Alcoholic (– OH) group can be identified by :

Esterification Test
Tollen's Reagent Test
FeCl3Test
Ozonolysis Reaction

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Chemistry
Atomic number of an atom gives the number of which of the following ?

Electrons
Neutrons
Protons
Neutrons and protons

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Chemistry
Spontaneous change is one in there is:

An increase in Internal energy
Increase in free energy
A lowering of free energy
A lowering of entropy

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MORE MCQ ON Chemistry

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