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.
Top Questions on biological importance of sodium and potassium
- The function of "Sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of the pump?
- AIPMT - 2015
- Chemistry
- biological importance of sodium and potassium
- Solvay process is used for the manufacture of:
- BITSAT - 2005
- Chemistry
- biological importance of sodium and potassium
Questions Asked in JEE Main exam
Given below are two statements:
Statement (I):
are isomeric compounds.
Statement (II):
are functional group isomers.
In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2025
- Isomerism
- Let ABC be a triangle formed by the lines \( 7x - 6y + 3 = 0 \), \( x + 2y - 31 = 0 \), and \( 9x - 2y - 19 = 0 \). Let the point \( (h, k) \) be the image of the centroid of \( \triangle ABC \) in the line \( 3x + 6y - 53 = 0 \). Then \( h^2 + k^2 + hk \) is equal to:
- JEE Main - 2025
- Coordinate Geometry
- For a reaction, $$ {N}_2{O}_5(g) \rightarrow 2{NO}_2(g) + \frac{1}{2} {O}_2(g) $$ in a constant volume container, no products were present initially. The final pressure of the system when 50% of the reaction gets completed is:
- JEE Main - 2025
- Chemical Reactions
- If the image of the point $ P(1, 0, 3) $ in the line joining the points $ A(4, 7, 1) $ and $ B(3, 5, 3) $ is $ Q(\alpha, \beta, \gamma) $, then $ \alpha + \beta + \gamma $ is equal to:
- JEE Main - 2025
- 3D Geometry
Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with
\(K_4\)[Fe(CN)\(_6\)] is : \[ {Cu}^{2+}, \, {Fe}^{3+}, \, {Ba}^{2+}, \, {Ca}^{2+}, \, {NH}_4^+, \, {Mg}^{2+}, \, {Zn}^{2+} \]- JEE Main - 2025
- Qualitative Analysis
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.