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In the preparation of H2SO4 by contact process, why is SO3 not absorbed directly in water to form H2SO4?

Important Questions on The p-Block Elements

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-4>Q 70
Write a balanced chemical equation for the reaction showing catalytic oxidation of NH3 by atmospheric oxygen.
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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-4>Q 71
Write the structure of pyrophosphoric acid.
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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-4>Q 72
PH3 forms bubbles when passed slowly in water but NH3 dissolves. Explain, why?
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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-4>Q 73
In PCl5, phosphorus is in sp3d hybridised state but all its five bonds are not equivalent. Justify your answer with reason.
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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-4>Q 74
Why is nitric oxide paramagnetic in gaseous state, but the solid obtained on cooling it is diamagnetic?
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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-4>Q 75
Give reason to explain why ClF3 exists but FCl3 does not exist.
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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-4>Q 76
SF6 is known but SCl6 is not. Why?
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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-4>Q 77
On reacting with Cl2, phosphorus forms two types of halides ‘A’ and ‘B’. Halide A is yellowish-white powder but halide ‘B’ is colourless oily liquid. Identify A and B, and write the formulae of their hydrolysis products.