Among the following reactions,  N2 is not generated by heating:

1. (NH4)2Cr2O7

2. NH4Cl + NaNO2

3. NH4Cl + CaO

4. Ba(N3)2

Subtopic:  Group 15 - Preparation, Properties & Uses |
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 An oxyacid among the following that contains both P-H and P-P bonds simultaneously is:

1. H4P2O5

2. H4P2O7

3. H4P2O6

4. None of the above

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Oxidation of nitrogen among the following reactions is indicated by -
1. \(\mathrm{N}_2 \rightarrow 2 \mathrm{NH}_3 \)
2. \(\mathrm{N}_2 \mathrm{O}_4 \rightarrow 2 \mathrm{NO}_2 \)
3. \(\mathrm{NO}_3{ }^{-} \rightarrow \mathrm{N}_2 \mathrm{O}_5 \)
4. \(\mathrm{NO}_2^{-} \rightarrow \mathrm{NO}_3^{-}\)

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Which of the following has been arranged in order of decreasing bond dissociation energy:

1. P-O>Cl-O>S-O

2. P-O>S-O>Cl-O

3. S-O>Cl-O>P-O

4. Cl-O>S-O>P-O

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses |
 56%
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Incorrectly matched characteristic is:

1. S8: covalent lattice

2. P4: tetrahedron

3. S52-: zigzag

4. SiO2: Covalent lattice

Subtopic:  Group 16 - Preparation, Properties & Uses |
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Which of the following is the correct statement?

1. F2 has higher dissociation energy than Cl2

2. F has higher electron affinity than Cl

3. HF is stronger acid than HCl

4. Boiling point increases down the group in halogens

Subtopic:  Group 17 - Preparation, Properties & Uses |
 56%
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The partial hydrolysis of one mole of peroxodi-sulphuric acid produces  

1. Two moles of sulphuric acid
2. Two moles of peroxomono-sulphuric acid
3. One mole of sulphuric acid, one mole of peroxomono-sulphuric acid
4. One mole of sulphuric acid, one mole of peroxomono-sulphuric acid and one mole of hydrogen peroxide

Subtopic:  Group 16 - Preparation, Properties & Uses |
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Iodine on reaction with concentrated nitric acid forms:

1. HOI

2. HI

3. HIO3

4. HIO4

Subtopic:  Group 15 - Preparation, Properties & Uses |
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The formation of PH4+ is difficult as compared to NH4+ because

1. Lone pair of phosphorous is optically inert.

2. Lone pair of phosphorous resides in almost pure p - orbital.

3. Lone pair of phosphorous resides at sp3 orbital.

4. Lone pair of phosphorous resides in almost pure s - orbital.

Subtopic:  Group 15 - Preparation, Properties & Uses |
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By heating which of the following, would NO2 be produced?

1. NaNO3

2. AgNO3

3. NH4NO3

4. NH4NO2

Subtopic:  Group 15 - Preparation, Properties & Uses |
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