C7 Quiz - Organic Chemistry

What is 'Organic Chemistry'?

What two elements make up a hydrocarbon?

The general formula for alkanes is CnH2n

Looking at the chemical formulae of these compounds, which is an alkane?

Alkanes are [blank_start]saturated[blank_end] hydrocarbons. This means that their [blank_start]carbon[blank_end] atoms are joined to each other by [blank_start]single[blank_end] bonds. This makes them relatively [blank_start]unreactive[blank_end], apart from their reaction with [blank_start]oxygen[blank_end] in the air - which we call burning or [blank_start]combustion[blank_end].

Which of the following is not true for alkanes?

Which alkane is represented by this structural formula?

Balance the following equation: [blank_start]2[blank_end]C2H6 + [blank_start]7[blank_end]O2 -> [blank_start]4[blank_end]CO2 + [blank_start]6[blank_end]H2O

Alkenes are unsaturated molecules.

Alkenes contain a carbon-[blank_start]carbon[blank_end] double bond. This bond is why the alkenes are [blank_start]more[blank_end] reactive than the alkanes. The number of [blank_start]hydrogen[blank_end] atoms in an alkene is [blank_start]double[blank_end] the number of carbon atoms, so they have the general formula Equation C[blank_start]n[blank_end]H[blank_start]2n[blank_end].

The presence of the C=C double bond allows alkenes to react in ways that alkanes cannot. This allows us to tell alkenes apart from alkanes using a simple chemical test. What is the test for an alkene?

Alcohols all contain the [blank_start]hydroxyl[blank_end] functional group –[blank_start]OH[blank_end], which is responsible for the [blank_start]properties[blank_end] of alcohols. The names of alcohols end ‘-[blank_start]anol[blank_end]’, eg ethanol. The first three alcohols in the series are methanol, ethanol and [blank_start]propanol[blank_end]. They are highly flammable, making them useful as fuels. They are also used as [blank_start]solvents[blank_end] in marker pens, medicines, and cosmetics (such as deodorants and perfumes). Ethanol is mixed with [blank_start]petrol[blank_end] for use as a fuel.

Alcohols have similar intermolecular bonding to water.

Which of the following are uses of methanol?

Ethanol is used as a fuel, and as a solvent in marker pens, for example.

What three methods can be used to produce ethanol?

The following statements are positive components of which method of producing ethanol? - High yields of ethanol (95%) - Theoretical atom economy of 100% - Efficient process

The feedstock for 'synthetic' ethanol includes....

What type of bacterium is genetically engineered and used in fermentation to produce ethanol?

The concentration of ethanol produced by the fermentation of micro-organisms must be kept low as otherwise the alcohol would poison the enzymes which are used to catalyse the reaction.

Complete the table by putting a cross (x) in the correct boxes to show what happens in each reaction.

A carboxylic acid is characterised by which functional group?

Carboxylic (organic) acids are weak acids which are less likely to ionise, or disassociate, in solution.

What type of organic chemicals do you need to mix together to make an ester?