Chemistry
Grade-10
Easy
Question
NaCl shows reactivity with nitric acid over __________ temperature.
- 100 °C
- 200 °C
- 50 °C
- 500 °C
Hint:
The temperature should be optimum for the reaction.
The correct answer is: 200 °C
The temperature of the mixture of concentrated sulfuric acid and sodium nitrate should not exceed 200o because sodium sulfate formed at higher temperatures forms a hard crust that sticks to the walls of the retort and is difficult to remove. At hight temperatures nitric acid may also decompose.
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