Which of the following elements does not show allotropy?

1. Nitrogen

2. Bismuth

3. Antimony

4. Arsenic

Subtopic:  Group 15 - Preparation, Properties & Uses |
 85%
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The maximum covalency of nitrogen is:

1. 3 2. 5
3. 4 4. 6

Subtopic:  Group 15 - Preparation, Properties & Uses |
 71%
From NCERT
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Which of the following statements is wrong?

1. Single N—N bond is stronger than a single P—P bond.
2. PH3 can act as a ligand in the formation of coordination compound with transition elements.
3. NO2 is paramagnetic in nature.
4. Covalency of nitrogen in N2O5 is four.
Subtopic:  Group 16 - Preparation, Properties & Uses | Group 15 - Preparation, Properties & Uses |
 77%
From NCERT
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A brown ring is formed in the ring test for NO3- ion. It is due to the formation of:

1. [Fe(H2O)5(NO)]2+
2. FeSO4.NO2 
3. [Fe(H2O)4 (NO)2]2+
4. FeSO4. HNO3

Subtopic:  Group 15 - Preparation, Properties & Uses |
 86%
From NCERT
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Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well-characterized compound in +5 oxidation state. The compound is-

1. Bi2O5
2. BiF5
3. BiCl5
4. Bi2S5

Subtopic:  Group 15 - Preparation, Properties & Uses |
 86%
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On heating ammonium dichromate and barium azide separately we get:

1. N2 in both cases
2. N2 with ammonium dichromate and NO with barium azide
3. N2O with ammonium dichromate and N2 with barium azide
4. N2O with ammonium dichromate and NO2 with barium azide
Subtopic:  Group 15 - Preparation, Properties & Uses |
 77%
From NCERT
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In the preparation of HNO3, we get NO gas by catalytic oxidation of ammonia. The moles of NO produced by the oxidation of two moles of NH3 will be:

1. 2 2. 3
3. 4 4. 6
Subtopic:  Group 15 - Preparation, Properties & Uses |
 73%
From NCERT
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The oxidation state of the central atom in the anion of the compound NaH2PO2 will be-

1. +3

2. +5

3. +1

4. -3

Subtopic:  Group 16 - Preparation, Properties & Uses |
 77%
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Which of the following is not tetrahedral in shape?

1.  NH4+
2.  SiCl4
3.  SF4
4.  SO42-

Subtopic:  Group 16 - Preparation, Properties & Uses |
 78%
From NCERT
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Which of the following are peroxoacids of sulphur?

1. \(\mathrm{H_{2} SO_{5}  }  \text{ and }     \mathrm{H_{2} S_{2} O_{8}}\) 2. \(\mathrm{H_{2} SO_{5  }}   \text{ and }     \mathrm{H_{2} S_{2} O_{7}}\)
3. \(\mathrm{H_{2} S_{2} O_{7}}   \text{ and }     \mathrm{H_{2} S_{2} O_{8}}\) 4. \(\mathrm{H_{2} S_{2} O_{6}}   \text{ and }     \mathrm{H_{2} S_{2} O_{7}}\)
Subtopic:  Group 16 - Preparation, Properties & Uses |
 55%
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