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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

A greenish yellow gas reacts with an alkali metal hydroxide to form a halate which can be used in fire works and safety matches. The gas and halate respectively are

Options

  1. AB r 2 , K B r O 3
  2. BC l 2 , K C l O 3
  3. CI 2 , N a I O 3
  4. DC l 2 , N a C l O 3

Correct answer

B. C l 2 , K C l O 3

Step-by-step solution

The gas is Cl2 and the halate used in fire works and safety matches is K C l O 3 3 C l 2 g r e e n i s h y e l l o w g a s + 6 K O H → K C l O 3 p o t . c h l o r a t e ( H a l a t e ) + 5 K C l + 3 H 2 O As bromine is reddish liquid and I 2 is violet solid so they are ignored here.

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