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This question is about elements in Group 7 of the Periodic Table and their compounds.(a) (i) Give the name of this group of elements. (1) ....................................................................................................................................................................................................................................................................................(ii) State the colour of chlorine gas. (1) ....................................................................................................................................................................................................................................................................................(iii) Give a test for chlorine gas.

Question

This question is about elements in Group 7 of the Periodic Table and their compounds.(a) (i) Give the name of this group of elements. (1) ....................................................................................................................................................................................................................................................................................(ii) State the colour of chlorine gas. (1) ....................................................................................................................................................................................................................................................................................(iii) Give a test for chlorine gas.

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Solution

(a) (i) This group of elements is known as the Halogens.

(ii) The color of chlorine gas is greenish-yellow.

(iii) A test for chlorine gas is to expose it to damp litmus paper. Chlorine gas will bleach the litmus paper, turning it white.

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