P-block elements practice · Hard

HI cannot be prepared by heating KI with conc.${H_2}S{O_4}$ because:

When one mole of bleaching powder is completely decomposed in presence of $\mathrm{C}{\mathrm{O}_2}$ then the mass of chlorine gas that is liberated will be:

Which of the following statements is correct?

(i) Number of $\mathrm{S}-\mathrm{S}$ bonds in $\mathrm{H}_2 \mathrm{S}_n \mathrm{O}_6$ are $(n+1)$

(ii) When $\mathrm{F}_2$ reacts with water, it gives $\mathrm{HF}$ and $\mathrm{O}_2$

(iii) $\mathrm{Zn}$ evolves $\mathrm{N}_2 \mathrm{O}$ gas on reaction with dil. $\mathrm{HNO}_3$

(iv) Both, white and red phosphorous react with boiling alkali to evolve $\mathrm{PH}_3(\mathrm{~g})$

Select the CORRECT reactant for brown ring test of $\mathrm{NO}_3{ }^{-}$ ion

Which of the following does not contain $P - O - P$ bond?

Schweitzer’s reagent is:

Assertion (A): The first real compound of the noble gases in 1962 was ${O}_2^{+}\left[{PtF}_6\right]^{-}$

Reason (R): The discovery was based on the basis of comparable ionisation energy of ${O}_2$ and ${Xe}$.

The source of most of the noble gases is:

Assertion: Fluorine oxidises $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$ but $\mathrm{Cl}_2$ does not.

Reason: Electronegativity of fluorine is greater than oxygen but EN of chlorine is lesser than oxygen.

The compound is used in the estimation of carbon monoxide. Here, $A$ refers to

Assertion: $\mathrm{O}_2 \mathrm{~F}_2$ is used for the purification of Plutonium from spent nuclear fuel.

Reason: $\mathrm{O}_2 \mathrm{~F}_2$ convert Plutonium to $\mathrm{PuF}_6$.