NEET Chemistry The p-Block Elements (XII) Questions Solved


Select the incorrect statement

(A) Nitrous oxide supports combustion more vigorously than air.

(B) Phosphorous pentaoxide dehydrates nitric acid forming nitrogen pentaoxide.

(C) Reactivity order of various allotropic forms of phosphorous is white > red > black.

(D) Red phosphorous changes to white phosphorus on heating in the atmosphere of CO2  or coal gas at 573 K.

(D) (A) 2N2O2N2+O2

It produces one third oxygen by volume of total gas produced while air has one fifth volume of oxygen.

(B) 2HNO3P2O5H2O+N2O5

(C) White phosphorus most reactive and black phosphorus is almost inert.

(D)  White phosphorus turns to red phosphorus on heating in the atmosphere of CO2 or coal gas
at 573 K.
So (A), (B), (C) are correct and (D) is correct.

 

Difficulty Level:

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