Q. 145.0( 1 Vote )
Which of the following statements is wrong?
A. Single N–N bond is stronger than the single P–P bond.
B. PH3 can act as a ligand in the formation of coordination compound with transition elements.
C. NO2 is paramagnetic in nature.
D. Covalency of nitrogen in N2O5 is four.
as electronegativity of nitrogen is greater than phosphorous due to small size of nitrogen therefore N-N bond is weaker than P-P bond.
Hence first statement is wrong.
PH3 acts as ligand in the formation of coordinate compounds due to presence of lone pair. Therefore second statement is correct.
NO2 is paramagnetic in nature due to presence of unpaired electrons. Therefore third statement is also correct.
Nitrogen cannot extend its covalency than 4 therefore fourth statement is also correct.
Hence the correct option is (i).
Rate this question :
Note : In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Chemistry - Exemplar
Why conductivity of silicon increases on doping with phosphorus?Chemistry - Board Papers
(a) Give reasons for the following :
(i) Sulphur in vapour state shows paramagnetic behaviour.
(ii) N-N bond is weaker than P-P bond.
(iii) Ozone is thermodynamically less stable than oxygen.
(b) Write the name of gas released when Cu is added to
(i) dilute HNO3 and
(ii) conc. HNO3
(a) (i) Write the disproportionation reaction of H3PO3.
(ii) Draw the structure of XeF4.
(b) Account for the following :
(i) Although Fluorine has less negative electron gain enthalpy yet F2 is strong oxidizing agent.
(ii) Acidic character decreases from N2O3 to Bi2O3 in group 15.
(c) Write a chemical reaction to test sulphur dioxide gas. Write chemical equation involved.
Chemistry - Board Papers