P-block elements practice · Mixed difficulty

Bromine is obtained on a commercial scale from:

S-I: Solubility of noble gases in water decreases with increasing size of the noble gas.

S-II: Solubility of noble gases in water is due to dipole induced dipole interaction.

Interhalogen compounds are:

A white precipitate was formed when $\mathrm{BaCl}_2$ was added to water extract of an inorganic salt. Further, a gas ' $\mathrm{X}$ ' with characteristic odour was released when the formed white precipitate was dissolved in dilute $\mathrm{HCl}$. The anion present in the inorganic salt is

Argon is used

Minimum bond length will be in:

Assertion (A) : Both $\mathrm{H}_3 \mathrm{PO}_3$ and $\mathrm{H}_3 \mathrm{PO}_4$ have the same number of hydrogen atoms but $\mathrm{H}_3 \mathrm{PO}_4$ is a tribasic acid and $\mathrm{H}_3 \mathrm{PO}_3$ is a dibasic acid.

Reason (R) : 1 mole of $\mathrm{H}_3 \mathrm{PO}_3$ is neutralised by 2 moles of $\mathrm{NaOH}$ while 1 mole of $\mathrm{H}_3 \mathrm{PO}_4$ is neutralised by 3 moles of $\mathrm{NaOH}$.

Atomicity of phosphorus is:

Which oxide of N is neutral?

In which of the following reaction, oxidation number of ${N}$ does not change

Which of the following is mixed anhydride?

Which of the following is/are CORRECT from the given below?

(I) Brown ring test for nitrate depends on the ability of ${Fe}^{2+}$ to reduce nitrate to nitric oxide
(II) Red phosphorus is much less reactive than white phosphorus

(III) Red phosphorus readily catches fire in air to give white fumes

(IV) White phosphorus is a translucent white waxy solid

Of the following, which has three electron bond in its structure?

$\mathrm{NH}_3$ reacts with $\mathrm{HCl}$. The correct reasons are

I. $\mathrm{NH}_3$ can donate a pair of electrons.

II. The $\mathrm{Cl}^{-}$ ion formed has a stable configuration.

III. The $\mathrm{N}$-atom of $\mathrm{NH}_3$ gains electrons.

IV. A proton in $\mathrm{HCl}$ can accept an electron pair from $\mathrm{NH}_3$.

The correct option is

A gas that cannot be collected over water is

When copper reacts with dilute nitric acid the gaseous product obtained is

The following statements concern elements in the
periodic table. Which of the following is true?

Which inert gas has the highest boiling point?

$\mathrm{NC}{\mathrm{l}_3}$ on hydrolysis yields:

What will be the ${A}$ and ${B}$ in the following equations.

$\begin{gathered} 8{{N}}{{{H}}_3} + \mathop {3{{C}}{{{l}}_2}}\limits_{(A)} \to 6{{N}}{{\text{H}}_4}{{Cl}} + {{{N}}_2} \quad \\ {{N}}{{{H}}_3} + \mathop {3{{C}}{{{l}}_2}}\limits_{(B)} \to {{NC}}{{{l}}_3} + 3{{HCl}} \quad \\ \end{gathered}$

${P_2}{O_5}$ is used extensively as a:

What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr?

Which of the following dissolves in water but does not give any oxyacid solution?

Ozonization of water is carried out to remove:

Among the compounds given in the options, identify the one which does not gives a precipitate with excess of both $\mathrm{NaOH}$ solution and $\mathrm{NH}_3$ solution?

Which of the following is not correct?

Assertion (A): Phosphoric acid has no reducing properties.

Reason (R): Phosphoric acid does not contain ${P}-{H}$ bonds.

Observe the following statements
I. Bleaching powder is used in the preparation of chloroform.
II. Bleaching powder decomposes in the presence of $\mathrm{CoC}{\mathrm{l}_\mathrm{2}}$ to liberate ${\mathrm{O}_2}$
III. Aqueous $\mathrm{KH}{\mathrm{F}_\mathrm{2}}$ is used in the preparation of fluorine.

Assertion: $\mathrm{Ba}\left(\mathrm{N}_3\right)_2$ give highly pure $\mathrm{N}_2$

Reason: Atomic weight of $\mathrm{Ba}$ is very high

Assertion (A): When ${H}_2 {S}({g})$ is passed into aqueous ${ZnCl}_2$, solution, ${ZnS}$ is precipitated.

Reason (R) : ${ZnS}$ is insoluble in dil. ${HCl}$.