Carbon and its Compounds

Identify the ester shown

• ethyl butanoate

• butyl ethanoate

• methyl butanoate

• ethyl propanoate

The number of electrons in the L shell of C is

• 2

• 4

• 6

• 8

----------------------------is a theory made by the Scientist Berzelius in 1809 which assumed that organic compounds are only formed in living cells and it is impossible to prepare them in laboratories.

• Vital Force Theory

• Star Force Theory

• Living Force Theory

• Organic Force Theory

Which among these is an aromatic hydrocarbon?

• Methane

• Butane

• Cylcohexane

• Benzene

The chemical formula of the next homologue of ethyne is

• C₃H₆

• C₃H₈

• C₃H₄

• C₂H₆

The IUPAC name of the shown compound is:

• 2-bromo-3-methyl-butan-1-ol

• 3-bromo-2-methyl-butan-1-ol

• 2-methyl-2-bromo-butan-1-ol

• 3-methyl-3-bromo-butan-1-ol

A: The middle zone of candle flame is yellow in colour.

R: Under the heat, some of the wax (paraffin) breaks down into tiny particles of carbon, which is called soot. These particles are heated up under the high temperature and glow with a bright yellow light. This makes candlelight yellow.

• Both, A and R, are true and R is the correct explanation of A

• Both, A and R, are true but R is not the correct explanation of A

• A is true but R is false

• A is false but R is true

A flame is only produced when gaseous substances burn

• True

• False

When we heat copper wire in the flame of a gas stove what is its colour?

• Pink

• Red

• Lilac

• Bluish green

Which has higher melting point?

• Diamond

• Graphite