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.
A. Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
B. Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
C. Assertion is correct, but reason is wrong statement.
D. Assertion is wrong but reason is correct statement.
E. Both assertion and reason are wrong statements.
Assertion : N2 is less reactive than P4.
Reason : Nitrogen has more electron gain enthalpy than phosphorus.
electron gain enthalpy of nitrogen is less than phosphorous. N2 is less reactive than P4 due to high bond dissociation enthalpy. More energy is required to break the bond N-N, therefore it is difficult to break the bond, while less amount of enegy is required to break the bond of phosphorous, therefore it is easy to break the bonds.
Hence N2is less reactive than P4.
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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