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)
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