Q. No.The correct representation of A and B in the following reaction are:
\(4 \mathrm{NaCl}+\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+6 \mathrm{H}_2 \mathrm{SO}_4 \longrightarrow 2 \mathrm{KHSO}_4+\underset{\begin{array}{c} \text { (Chromyl } \\ \text { chloride) } \end{array}}{\mathrm{A}}+4 \mathrm{NaHSO}_4+3 \mathrm{H}_2 \mathrm{O} \)
\(\begin{aligned} & \left(\mathrm{CH}_3 \mathrm{COO}\right)_2 \mathrm{~Pb}+\underset{\begin{array}{c} \text { Sodium} \\ \text { chromate } \end{array}}{\mathrm{Na_2CrO_4}} \longrightarrow \underset{\begin{array}{c} \text { Lead chromate} \\ \text {(Yellow precipitate)} \end{array}}{\mathrm{B}}+~~2 \mathrm{CH}_3 \mathrm{COONa} \\ \end{aligned}\\ \)
1. CrO3 and PbCrO4
2. CrO2Cl2 and PbCrO4
3. Cr2O7 and Pb CrO4
4. Cr2O7 and PbCl2
\(4 \mathrm{NaCl}+\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+6 \mathrm{H}_2 \mathrm{SO}_4 \longrightarrow 2 \mathrm{KHSO}_4+\underset{\begin{array}{c} \text { (Chromyl } \\ \text { chloride) } \end{array}}{\mathrm{A}}+4 \mathrm{NaHSO}_4+3 \mathrm{H}_2 \mathrm{O} \)
\(\begin{aligned} & \left(\mathrm{CH}_3 \mathrm{COO}\right)_2 \mathrm{~Pb}+\underset{\begin{array}{c} \text { Sodium} \\ \text { chromate } \end{array}}{\mathrm{Na_2CrO_4}} \longrightarrow \underset{\begin{array}{c} \text { Lead chromate} \\ \text {(Yellow precipitate)} \end{array}}{\mathrm{B}}+~~2 \mathrm{CH}_3 \mathrm{COONa} \\ \end{aligned}\\ \)
1. CrO3 and PbCrO4
2. CrO2Cl2 and PbCrO4
3. Cr2O7 and Pb CrO4
4. Cr2O7 and PbCl2
Subtopic: Detection of Anions |
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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
1. Blue
2. Canary yellow
3. Red
4. Green
Subtopic: Detection of Anions |
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What color does acetate turn when it reacts with a neutral ferric chloride solution?
1. Blue
2. Yellow
3. Deep red
4. Green
1. Blue
2. Yellow
3. Deep red
4. Green
Subtopic: Detection of Anions |
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\(\begin{aligned} & \mathrm{Na}_2 \mathrm{~S}+\mathrm{Na}_2\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NO}\right] \longrightarrow \text A \\ & \text { Sodium nitroprusside } \\ & \end{aligned} \)
The formula of A is :
1. \(Na_4[Fe(CN)_5NOS]\)
2. \(Na_2[Fe(CN)_5NOS]\)
3. \(K_4[Fe(CN)_5NOS]\)
4. \(K_2 [Fe(CN)_4NOS]\)
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 |
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What is observed visually when ammonium hydroxide and hydrochloric acid react?
1. Red coloration
2. White fumes
3. Blue precipitate
4. No visible change
1. Red coloration
2. White fumes
3. Blue precipitate
4. No visible change
Subtopic: Detection of Anions |
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The colourless gas that evolved with the smell of rotten eggs is:
1. \(H_2\)
2. \(SO_2\)
3. \(H_2S\)
4. \(CO_2\)
1. \(H_2\)
2. \(SO_2\)
3. \(H_2S\)
4. \(CO_2\)
Subtopic: Detection of Anions |
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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
1. It turns white
2. It remains unchanged
3. It turns black
4. It turns yellow
Subtopic: Detection of Anions |
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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
1. Red to green
2. Green to red
3. Orange to green
4. Yellow to green
Subtopic: Detection of Anions |
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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. \(\text{SO}^{2-}\)
3. \(\text{SO}^{2-}_3\)
4. \(\text{CO}^{2-}_3\)
1. \(\text{SO}^{2-}_4\)
2. \(\text{SO}^{2-}\)
3. \(\text{SO}^{2-}_3\)
4. \(\text{CO}^{2-}_3\)
Subtopic: Detection of Anions |
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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 |
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