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Q. No.The reagent used in the chromyl chloride test is:
1. \(K_2CrO_4 \)
2. \(CrO_3 \)
3. \(K_2Cr_2O_7 \)
4. \((NH_4)_2Cr_2O_7 \)
Subtopic: Detection of Cations |
78%
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Two test tubes containing nitrate and bromide are treated separately with conc. H2SO4. Brown fumes, thus evolved, are passed in water. The water will be coloured by vapours evolved from the test tube containing:
1. Nitrate
2. Bromide
3. Both (a) and (b)
4. None of these
1. Nitrate
2. Bromide
3. Both (a) and (b)
4. None of these
Subtopic: Detection of Anions |
50%
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The solution of a chemical compound (X) reacts with \(AgNO_3\) solution to form a white precipitate of (Y) which in turn dissolves in \(NH_4OH \) to give a complex (Z). When (Z) is treated with dilute \(HNO_3,\) (Y) reappears. The chemical compound X can be :
1. \(NaCl \)
2. \(CH_3Cl \)
3. \(NaBr \)
4. \(NaI \)
1. \(NaCl \)
2. \(CH_3Cl \)
3. \(NaBr \)
4. \(NaI \)
Subtopic: Detection of the functional groups |
74%
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When dil. H2SO4 is introduced to an inorganic mixture at a low temperature, an odourless, colourless gas is produced. The mixture includes:
1. Sulphite
2. Acetate
3. Nitrite
4. Carbonate
1. Sulphite
2. Acetate
3. Nitrite
4. Carbonate
Subtopic: Detection of Anions |
73%
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When bismuth chloride is poured into a large volume of water, the formula for the white precipitate produced is:
1. \(Bi(OH)_3\)
2. \(Bi_2O_3 \)
3. \(BiOCl \)
4. \(Bi_2OCl \)
1. \(Bi(OH)_3\)
2. \(Bi_2O_3 \)
3. \(BiOCl \)
4. \(Bi_2OCl \)
Subtopic: Detection of Cations |
From NCERT
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Nessler's reagent is used to detect:
1. \(CrO^{2-}_4\)
2. \(PO^{3-}_4\)
3. \(MnO^{-}_4\)
4. \(NH^{+}_4\)
1. \(CrO^{2-}_4\)
2. \(PO^{3-}_4\)
3. \(MnO^{-}_4\)
4. \(NH^{+}_4\)
Subtopic: Detection of Cations |
78%
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A gas (X) is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with the evolution of a colourless gas (Y). X and Y, respectively, are:
1. \(X= CO_2,~Y=Cl_2 \)
2. \(X= Cl_2,~Y=CO_2 \)
3. \(X= Cl_2,~Y=H \)
4. \(X= H,~Y=Cl_2 \)
1. \(X= CO_2,~Y=Cl_2 \)
2. \(X= Cl_2,~Y=CO_2 \)
3. \(X= Cl_2,~Y=H \)
4. \(X= H,~Y=Cl_2 \)
Subtopic: Detection of Anions |
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\(Cu^{2+}\) ions can be reduced to \(Cu^{+}\) ions by the addition of an aqueous solution of:
1. \(KF \)
2. \(KCl \)
3. \(KI \)
4. \(KOH \)
1. \(KF \)
2. \(KCl \)
3. \(KI \)
4. \(KOH \)
Subtopic: Detection of Cations | Detection of Anions |
63%
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A basic radical among the following that cannot be precipitated by
\(H_2S \) gas in the presence of \(NH_3 \) is:
1. \(Mn^{2+}\)
2. \(Ni^{2+}\)
3. \(Cd^{2+}\)
4. \(Ca^{2+}\)
\(H_2S \) gas in the presence of \(NH_3 \) is:
1. \(Mn^{2+}\)
2. \(Ni^{2+}\)
3. \(Cd^{2+}\)
4. \(Ca^{2+}\)
Subtopic: Detection of Cations |
61%
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A metal nitrate reacts with \(Kl \) to give a black precipitate which upon additionof excess
of \(Kl\) converts into orange colour solution. The cation of the metal nitrate is:
1. \(Hg^{2+}\)
2. \(Bi^{3+}\)
3. \(Pb^{2+}\)
4. \(Cu^+\)
of \(Kl\) converts into orange colour solution. The cation of the metal nitrate is:
1. \(Hg^{2+}\)
2. \(Bi^{3+}\)
3. \(Pb^{2+}\)
4. \(Cu^+\)
Subtopic: Detection of Cations |
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