Q. No.The correct representation of A and B in the following reaction are:
| \(\small 4\mathrm{NaCl}+{\mathrm K}_2{\mathrm{Cr}}_2{\mathrm O}_7+6{\mathrm H}_2{\mathrm{SO}}_4\longrightarrow2{\mathrm{KHSO}}_4+\underset{\begin{array}{c}\text{ (Chromyl }\\\text{ chloride) }\end{array}}{\mathbf A}\\\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\small +4{\mathrm{NaHSO}}_4+3{\mathrm H}_2\mathrm O\) |
| \(\small\begin{aligned} & \left(\mathrm{CH}_3 \mathrm{COO}\right)_2 \mathrm{~Pb}+\underset{\begin{array}{c} \text { Sodium} \\ \text { chromate } \end{array}}{\mathrm{Na_2CrO_4}} \longrightarrow \underset{\begin{array}{c} \text { Lead chromate} \\ \text {(Yellow precipitate)} \end{array}}{\mathbf{B}}+~~2 \mathrm{CH}_3 \mathrm{COONa} \\ \end{aligned}\\ \) |
| 1. | CrO3 and PbCrO4 | 2. | CrO2Cl2 and PbCrO4 |
| 3. | Cr2O7 and Pb CrO4 | 4. | Cr2O7 and PbCl2 |
Subtopic: Detection of Anions |
91%
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NEET 2026 - Target Batch - Vital
Hints
What color precipitate indicates the presence of phosphate ions in the test solution containing ammonium molybdate solution,conc. HNO3 and boil to the test solution containing phosphate ions?
| 1. | Blue | 2. | Canary yellow |
| 3. | Red | 4. | Green |
Subtopic: Detection of Anions |
86%
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NEET 2026 - Target Batch - Vital
Hints
What color does acetate turn when it reacts with a neutral ferric chloride solution?
| 1. | Blue | 2. | Yellow |
| 3. | Deep red | 4. | Green |
Subtopic: Detection of Anions |
54%
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NEET 2026 - Target Batch - Vital
Hints
\(\begin{aligned} & \mathrm{Na}_2 \mathrm{~S}+\mathrm{Na}_2\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NO}\right] \longrightarrow \text A \\ & \text { Sodium nitroprusside } \\ & \end{aligned} \)
The formula of A is:
The formula of A is:
| 1. | \(Na_4[Fe(CN)_5NOS]\) | 2. | \(Na_2[Fe(CN)_5NOS]\) |
| 3. | \(K_4[Fe(CN)_5NOS]\) | 4. | \(K_2 [Fe(CN)_4NOS]\) |
Subtopic: Detection of Anions |
80%
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NEET 2026 - Target Batch - Vital
Hints
What is observed visually when ammonium hydroxide and hydrochloric acid react?
| 1. | Red coloration | 2. | White fumes |
| 3. | Blue precipitate | 4. | No visible change |
Subtopic: Detection of Anions |
89%
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NEET 2026 - Target Batch - Vital
Hints
The colourless gas that evolved with the smell of rotten eggs is:
| 1. | \(H_2\) | 2. | \(SO_2\) |
| 3. | \(H_2S\) | 4. | \(CO_2\) |
Subtopic: Detection of Anions |
91%
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NEET 2026 - Target Batch - Vital
Hints
What happens to lead acetate paper when exposed to H2S gas?
| 1. | It turns white | 2. | It remains unchanged |
| 3. | It turns black | 4. | It turns yellow |
Subtopic: Detection of Anions |
90%
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NEET 2026 - Target Batch - Vital
Hints
What is the color change observed when sulphur dioxide reacts with acidified potassium dichromate solution?
| 1. | Red to green | 2. | Green to red |
| 3. | Orange to green | 4. | Yellow to green |
Subtopic: Detection of Anions |
79%
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NEET 2026 - Target Batch - Vital
Hints
BaCl2 solution gives a white ppt. with a solution of an acid radical which dissolves in dil. HCl with the evolution of a colourless, pungent-smelling gas. The acid radical may be:
| 1. | \(\text{SO}^{2-}_4\) | 2. | \(\text{HSO}_4^{-}\) |
| 3. | \(\text{SO}^{2-}_3\) | 4. | \(\text{CO}^{2-}_3\) |
Subtopic: Detection of Anions |
54%
Please attempt this question first.
Hints
What is the correct formula for Sodium Nitroprusside?
| 1. | \(\mathrm{Na}_2\mathrm{[Fe(C N)_5 \mathrm{NO}]}\) | 2. | \(K_2[\mathrm{Fe}(\mathrm{CN})_5 Cl]\) |
| 3. | \(\mathrm{Na}_2\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O})_5 \mathrm{NO}\right]\right.\) | 4. | \(\mathrm{Na}_2[\mathrm{Mn}\mathrm{(CN)_5 \mathrm{Br}}]\) |
Subtopic: Detection of Anions |
83%
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NEET 2026 - Target Batch - Vital
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