Q1: Complete the paragraph by filing the gaps. (3 marks)

Group ……… elements are called halogens, their molecules are

………………………… e.g. the formula of bromine molecule is

written as Br2 . Halides can be tested by using …………………

nitrate solution. For example chlorides give …………….

Precipitate which dissolve in ammonia solution.

Bromide give ………………….. precipitate and iodide give

…………………….. precipitate.

Q 2: Observe the diagram below and answer the questions.

(i) Explain the trend in melting point of halogens. (1)

(ii) Predict the physical state of chlorine and iodine. (1)

Q 3: (i) What are hydrocarbons? (1 MARK)

(ii) Fill in the gaps in the following table. (4 marks)