NSC Physical Sciences Organic Compounds and Macromolecules: 4.1 Write down the meaning of th

Question

4.1 Write down the meaning of the term hydrohalogenation.

The addition of a hydrogen halide/HX to an alkene.

4.2 Write down the STRUCTURAL FORMULA of compound Q.

The structural formula for compound Q is:

```
     H   H
      |   |
 H -- C = C -- C -- H
      |   |
     H   Cl
```

4.3 Reaction I is an elimination reaction.

Write down the:

4.3.1 TYPE of elimination reaction

The type of elimination reaction is Cracking.

4.3.2 MOLECULAR FORMULA of compound P

The molecular formula of compound P is C3H8.

4.4 Write down the IUPAC name of compound R.

The IUPAC name of compound R is 1,2-dibromopropane.

4.5 For the HYDROLYSIS REACTION, write down the:

4.5.1 Balanced equation using structural formulae.

The balanced equation for the hydrolysis reaction is:

```
     H   H
      |   |
 H -- C -- C -- C -- OH
      | _ | _ | _ |  
     NaOH/H2O  
```

4.5.2 TWO reaction conditions.

1. Mild heat (Matige hitte)  
2. Dilute strong base NaOH/KOH or water/H2O.

4.1 Write down the meaning of the term hydrohalogenation - NSC Physical Sciences - Question 4 - 2020 - Paper 2