During halogen test, sodium fusion extract is boiled with concentrated HNO3 to
- remove unreacted sodium
- decompose cyanide or sulphide of sodium
- extract halogen from organic compound
- maintain the pH of extract.
The Correct Option is A
Solution and Explanation
The correct option is(B): decompose cyanide or sulphide of sodium.
During test for halogen, if nitrogen or sulphur is also present in the compound, then sodium fusion extract is first boiled with concentrated nitric acid to decompose cyanide or sulphide of sodium formed during Lassaigne’s test.
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Concepts Used:
Biological Importance of Sodium and Potassium
Biological Importance of Sodium:
- Sodium is used for the generation of courageous impulses and for the maintenance of electrolyte balance and fluid balance.
- Sodium ions are essential for heart activities and certain metabolic functions. Health is overdone when the body has too much and too little sodium.
- They are required for the transport of sugars and amino acids into the cells
Biological Importance of Potassium:
- Potassium ions are fundamentally found inside the cell.
- They maintain the osmolarity (the concentration of a solution indicated as the total number of solute particles per liter) of the cell. They also balance the opening and the closing of the stomata.
- They act as cofactors for particular enzymes such as pyruvate kinase.
- Potassium is essential in heart function and in skeleton and muscle contraction.
- Diets with low potassium leads to hypertension.
- It maintains the electrolyte stability in the body.