Q. No.Consider the following equation,
H3PO3 \(\xrightarrow[]{\Delta }\) X + Y
The products X and Y are respectively -
1. H3PO2 ; PH3
2. H3PO4 ; PH3
3. H3PO4 ; H3PO2
4. None of the above
H3PO3 \(\xrightarrow[]{\Delta }\) X + Y
The products X and Y are respectively -
1. H3PO2 ; PH3
2. H3PO4 ; PH3
3. H3PO4 ; H3PO2
4. None of the above
Subtopic: Group 16 - Preparation, Properties & Uses |
65%
From NCERT
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The important source(s) of sulphur among the following is/are:
1. Gypsum
2. Epsom salt
3. Galena
4. All of the above
1. Gypsum
2. Epsom salt
3. Galena
4. All of the above
Subtopic: Group 16 - Preparation, Properties & Uses |
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What is the correct order of thermal stability of the hydrides of Group 16 elements?
1. H2O < H2S < H2Se < H2Te
2. H2O > H2S > H2Se > H2Te
3. H2O > H2S < H2Se < H2Te
4. H2O > H2S > H2Se < H2Te
1. H2O < H2S < H2Se < H2Te
2. H2O > H2S > H2Se > H2Te
3. H2O > H2S < H2Se < H2Te
4. H2O > H2S > H2Se < H2Te
Subtopic: Group 16 - Preparation, Properties & Uses |
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H2O is a liquid whereas H2S is a gas because of:
1. Stronger van der Waals force in H2O
2. Stronger hydrogen bonding in H2O
3. Stronger ion-dipole interaction in H2O
4. High dissociation constant of H2O
1. Stronger van der Waals force in H2O
2. Stronger hydrogen bonding in H2O
3. Stronger ion-dipole interaction in H2O
4. High dissociation constant of H2O
Subtopic: Group 16 - Preparation, Properties & Uses |
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Subtopic: Group 16 - Preparation, Properties & Uses |
84%
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Consider the following reactions,
a. C2H4 + 3O2→ X + 2H2O
b. 4Al+ 3O2 → Z
X and Z are respectively-
1. X = 1 mole of CO2; Z = 4 moles of Al2O3
2. X = 2 moles of ethanoic acid; Z = 2 moles of AlO3
3. X = 2 moles of CO2; Z = 2 moles of Al2O3
4. X = 2 moles of ethanoic acid; Z = 4 moles of Al2O3
Subtopic: Group 16 - Preparation, Properties & Uses |
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| Assertion (A): | O3 acts as a powerful oxidizing agent. |
| Reason (R): | Ozone decomposes readily on heating to give a molecule of oxygen and nascent oxygen. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Group 16 - Preparation, Properties & Uses |
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O3 can be estimated quantitatively by reacting it with among the following compounds:
1. Iodine
2. Potassium iodide.
3. Chlorine.
4. Sodium chloride.
1. Iodine
2. Potassium iodide.
3. Chlorine.
4. Sodium chloride.
Subtopic: Group 16 - Preparation, Properties & Uses |
75%
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Correct statement among the following on reaction of sulphur dioxide with an aqueous solution of Fe(III) salt is -
1. Redox reaction occurs
2. Disproportionation reaction occurs
3. Displacement reaction occurs
4. Combination reaction occurs
1. Redox reaction occurs
2. Disproportionation reaction occurs
3. Displacement reaction occurs
4. Combination reaction occurs
Subtopic: Group 16 - Preparation, Properties & Uses |
58%
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| Statement 1: | SO2 is a sp3 hybridised molecule. |
| Statement 2: | Two S−O bonds in SO2 are not equal in length. |
2. Statement 1 is False, Statement 2 is True.
3. Both Statements are True.
4. Both Statements are False.
Subtopic: Group 16 - Preparation, Properties & Uses |
55%
From NCERT
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