OCR A-Level Chemistry A: Module 6 (Organic chemistry and analysis) overview quiz quiz

Because it has no hydrogen atoms attached to the ring that could be substituted

Because benzene is saturated

Because addition would disrupt the stable delocalised ring of pi electrons

Because the carbon atoms are sp3 hybridised

Dilute nitric acid only

Sodium nitrate and water

Dilute nitric acid warmed gently with an aluminium chloride halogen carrier

Concentrated nitric acid with a concentrated sulfuric acid catalyst

$\text{AlCl}_3$

Concentrated $\text{H}_2\text{SO}_4$

$\text{Ni}$

$\text{V}_2\text{O}_5$

2,4-DNPH gives an orange precipitate with the aldehyde only

Tollens' reagent gives a silver mirror with the aldehyde only

Bromine water is decolourised by the ketone only and not by the aldehyde

Both give a silver mirror with Tollens' reagent

Acidified $\text{K}_2\text{Cr}_2\text{O}_7$

Concentrated $\text{H}_2\text{SO}_4$

$\text{NaBH}_4$

$\text{HCN}$ with $\text{KCN}$

Reflux with aqueous sodium hydroxide

Warm gently with acidified potassium dichromate(VI) solution

Room temperature with no catalyst

Reflux with concentrated sulfuric acid catalyst

A zwitterion with $\text{-NH}_3^+$ and $\text{-COO}^-$

A neutral molecule with $\text{-NH}_2$ and $\text{-COOH}$

A fully positive ion

A fully negative ion

A diol reacting with a dicarboxylic acid

A diamine and a dicarboxylic acid

Two alkenes

A diol and a diamine

The total number of hydrogen atoms present in the molecule

The relative molecular mass

The number of chemically different carbon environments

The number of double bonds

2 (doublet)

3 (triplet)

4 (quartet)

1 (singlet)