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1994 WAEC Chemistry Theory (a) Write an equation to show the action of strong heat on: (i) potassium trioxonitrate...

Chemistry
WAEC 1994

(a) Write an equation to show the action of strong heat on:

(i) potassium trioxonitrate (V):

(ii) sucrose.

(b) State two observations in respect of the reaction between granulated zinc and dilute tetraoxosulphate (VI) acid.

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Explanation

(a)(i) 2KNO\(_3\) \(\to\) 2KNO\(_2\) + O\(_2\) 

(ii) C\(_{12}\)H\(_{22}\)O\(_{11}\) + 11H\(_2\)O

(b) Two observations include:

(i) gas is given off

(ii) The zinc disappears to form a colourless solution.


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