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
Incorrectly matched characteristic is:
1. S8: covalent lattice
2. P4: tetrahedron
3. S52-: zigzag
4. SiO2: Covalent lattice
Among the following reactions, N2 is not generated by heating:
1. (NH4)2Cr2O7
2. NH4Cl + NaNO2
3. NH4Cl + CaO
4. Ba(N3)2
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
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. \(\mathrm{NO}_2^{-} \rightarrow \mathrm{NO}_3^{-}\)
B(OH)3 + NaOH NaBO2 + Na[B(OH)4] +H2O
How can this reaction is made to proceed in forward direction?
1. addition of cis 1,2 diol
2. addition of borax
3. addition of trans 1,2 diol
4. addition of Na2HPO4
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
Iodine on reaction with concentrated nitric acid forms:
1. HOI
2. HI
3. HIO3
4. HIO4
The formation of is difficult as compared to 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.
By heating which of the following, would NO2 be produced?
1. NaNO3
2. AgNO3
3. NH4NO3
4. NH4NO2