What happens when barium azide is heated?

Important Questions on The p-Block Elements

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-1>Q 144

Which stable elements of ${15}^{\text{th }}$ and ${16}^{\text{th }}$ group do not react with water under normal conditions?

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-1>Q 145

Chemiluminescence is a phenomenon in which on element glows in dark when exposed to moisture. Which element of ${15}^{\text{th }}$ group shows this phenomenon?

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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-1>Q 149

On being slowly passed through water, ${\mathrm{PH}}_3$ forms bubbles but ${\mathrm{NH}}_3$ dissolves. Why is it so?

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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-1>Q 155

In the manufacture of sulphuric acid by the contact process, sulphur trioxide is not directly dissolved in water. Why?

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-1>Q 156

How are ${\mathrm{SO}}_2{\mathrm{Cl}}_2, {\mathrm{SO}}_2$ and ${\mathrm{SO}}_2$ obtained from sulphuric acid?

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-1>Q 157

Sulphur on oxidation with hot sulphuric acid gives

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-1>Q 158

Pentahalides of phosphorus are known, but not pentahydride. Why?

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-1>Q 159

A compound ${}^{\text{'}}\mathrm{X}^{\text{'}}$ which is a yellowish-white powder is prepared by the reactions of white phosphorous with an excess of dry ${\mathrm{Cl}}_2.$ Identify $\text{'}\mathrm{X}\text{'}$.