Question:
Identify A, B, and C in the given reaction sequence:
\[
\text{A} \xrightarrow{\text{HNO}_3} \text{Pb(NO}_3)_2 \xrightarrow{\text{H}_2\text{SO}_4} \text{B} \rightarrow \text{C (Yellow ppt)}.
\]
Identify A, B, and C in the given reaction sequence:
\[
\text{A} \xrightarrow{\text{HNO}_3} \text{Pb(NO}_3)_2 \xrightarrow{\text{H}_2\text{SO}_4} \text{B} \rightarrow \text{C (Yellow ppt)}.
\]
Show Hint
The reaction sequence involves the formation of lead nitrate, lead sulfate, and lead chromate. This is a typical sequence for testing the presence of lead in reactions with chromates.
Updated On: Mar 17, 2025
- Ammonium acetate
- Acetic acid
- \( \text{K}_2\text{CrO}_4 \)
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1 (A): When lead (Pb) reacts with nitric acid (\( \text{HNO}_3 \)), lead nitrate (\( \text{Pb(NO}_3)_2 \)) is formed:
\[
\text{Pb} + 2 \text{HNO}_3 \rightarrow \text{Pb(NO}_3)_2 + \text{H}_2.
\]
- Step 2 (B): When lead nitrate reacts with sulfuric acid (\( \text{H}_2\text{SO}_4 \)), lead sulfate (\( \text{PbSO}_4 \)) is formed:
\[
\text{Pb(NO}_3)_2 + \text{H}_2\text{SO}_4 \rightarrow \text{PbSO}_4 + 2 \text{HNO}_3.
\]
- Step 3 (C): When lead sulfate (\( \text{PbSO}_4 \)) reacts with potassium chromate (\( \text{K}_2\text{CrO}_4 \)), a yellow precipitate of lead chromate (\( \text{PbCrO}_4 \)) is formed:
\[
\text{PbSO}_4 + \text{K}_2\text{CrO}_4 \rightarrow \text{PbCrO}_4 (yellow ppt) + \text{K}_2\text{SO}_4.
\]
Thus, A is Pb, B is PbSO₄, and C is PbCrO₄ (yellow ppt).
Was this answer helpful?
0
0
Top Questions on Chemical Reactions
In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl. The percentage composition of chlorine in the compound is ___________%. [Given: Molar mass in g mol\(^{-1}\) of Ag = 108, Cl = 35.5]
- JEE Main - 2025
- Chemistry
- Chemical Reactions
- Given below are two statements: Statement (I): The boiling points of alcohols and phenols increase with increase in the number of C-atoms.
Statement (II): The boiling points of alcohols and phenols are higher in comparison to other classes of compounds such as ethers and haloalkanes. In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2025
- Chemistry
- Chemical Reactions
Consider the following reaction occurring in the blast furnace. \[ {Fe}_3{O}_4(s) + 4{CO}(g) \rightarrow 3{Fe}(l) + 4{CO}_2(g) \] ‘x’ kg of iron is produced when \(2.32 \times 10^3\) kg \(Fe_3O_4\) and \(2.8 \times 10^2 \) kg CO are brought together in the furnace.
The value of ‘x’ is __________ (nearest integer).- JEE Main - 2025
- Chemistry
- Chemical Reactions
X g of benzoic acid on reaction with aqueous \(NaHCO_3\) release \(CO_2\) that occupied 11.2 L volume at STP. X is ________ g.
- JEE Main - 2025
- Chemistry
- Chemical Reactions
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
- Chemistry
- Chemical Reactions
View More Questions
Questions Asked in JEE Main exam
- The formation enthalpies, \( \Delta H_f^\circ \) for \( \text{H}_2 \) and \( \text{O}_2 \) are 220.0 and 250.0 kJ mol\(^{-1}\), respectively, at 298.15 K, and \( \Delta H_f^\circ \) for \( \text{H}_2\text{O} \) (g) is -242.0 kJ mol\(^{-1}\) at the same temperature. The average bond enthalpy of the O-H bond in water at 298.15 K is:
- JEE Main - 2025
- Thermodynamics
- Consider ‘n’ is the number of lone pair of electrons present in the equatorial position of the most stable structure of \( \text{ClF}_3 \). The ions from the following with ‘n’ number of unpaired electrons are:
A. \( \text{V}^{3+} \)
B. \( \text{Ti}^{3+} \)
C. \( \text{Cu}^{2+} \)
D. \( \text{Ni}^{2+} \)
E. \( \text{Ti}^{2+} \)
Choose the correct answer from the options given below:- JEE Main - 2025
- Thermodynamics
- What is the freezing point depression constant of a solvent, 50 g of which contain 1 g non-volatile solute (molar mass 256 g mol\(^{-1}\)) and the decrease in freezing point is 0.40 K?
- JEE Main - 2025
- Thermodynamics
- For a given reaction \( R \rightarrow P \), \( t_{1/2} \) is related to \([A_0]\) as given in the table. Given: \( \log 2 = 0.30 \). Which of the following is true?
\([A]\) (mol/L) \(t_{1/2}\) (min) 0.100 200 0.025 100 - JEE Main - 2025
- Thermodynamics
- Consider the following sequence of reactions:
i) \( \text{Mg}, \text{dry ether} \)
ii) \( \text{CO}_2, \text{H}_2\text{O}^+ \)
iii) \( \text{NH}_3, \Delta \)
11.25 mg of chlorobenzene will produce \( x \times 10^{-1} \) mg of product B. Given molar mass of C, H, O, N, and Cl as 12, 1, 16, 14, and 35.5 g mol\(^{-1}\), respectively, the value of \( x \) is:- JEE Main - 2025
- Organic Chemistry
View More Questions