P-block elements practice · Medium

Oxide of nitrogen which has smallest ' $\mathrm{N}-\mathrm{O}$ ' bond length among the following is

$Xe{O_2}{F_2}$ is obtained by partial bydrolysis of

Iodide of Millon's base is :

When copper is heated with conc. $\mathrm{HN}{\mathrm{O}_3}$ it produces:

The substance used in Holme’s signal of the ship is a mixture of

Which among the following is least covalent in nature?

Fertilizer having the highest nitrogen percentage is:

In qualitative analysis, when $\mathrm{H}_2 \mathrm{~S}$ is passed through an aqueous solution of salt acidified with dil. $\mathrm{HCl}$, a black precipitate is obtained. On boiling the precipitate with dil. $\mathrm{HNO}_3$, it forms a solution of blue colour. Addition of excess of aqueous solution of ammonia to this solution gives ......... .

Red $\mathrm{P}$ can be obtained by white $\mathrm{P}$ by

In the Haber process for the manufacture of ammonia the following catalyst is used

Liquor ammonia bottles are opened only after cooling because it has high vapour pressure and it is mild explosive.

Which is the correct thermal stability order for ${H_2}E\,(E\, = \,O,\,S,\,Se,\,Te\,\mathrm{and}\,Po)?$

Statement I: Noble gases have highest ionization energies in their respective periods

Statement II: The outer most shell of noble gases is completely filled

Which hydride has the lowest boiling point?

Bleaching powder is a mixture of:

Javelle water is:

Assertion (A) : $\mathrm{S}_3 \mathrm{O}_6^{2-}$ (trithionate) has $\mathrm{S}-\mathrm{S}$ bond.

Reason (R) : It is a conjugate base of $\mathrm{HS}_3 \mathrm{O}_6^{-}$.

In the reaction, $\mathrm{MnO}_4^ - \mathrm{\;} + \mathrm{\;}{\mathrm{I}^ - }\;\mathop \to \limits^{A\mathrm{lkaline\;solution}} \;\left[ X \right];\,\,\left[ X \right]\;\mathrm{is}:$

The element evolving two different gases on reaction with conc. Sulphuric acid is

Which of the following is not a drying and dehydrating agent?

Assertion: $\mathrm{NH}_3$ is easily dissolved in alkaline $\mathrm{HgI}_4{ }^{2-}$

Reason: Compound of $\mathrm{Hg}^{-}$and $\mathrm{I}^{-}$is used in detection of $\mathrm{NH}_3$.

$HN{O_3}\;$ oxidises :

Coloured oxide is nitrogen is:

Hydrolysis of $P{I_3}$ yields:

Statement-I: The solid ${N}_2 {O}_5$ is ionic.

Statement-II: In solid state ${N}_2 {O}_5$ exist as $\left[{NO}_3\right]^{+}\left[{NO}_2\right]^{-}$

Sulphur reacts with chlorine in 1:2 ratio and forms ${X}$. Hydrolysis of ${X}$ gives a sluphur compound ${Y}$. The hybridization of central atom in the anion ${Y}$ is

Which can act as an acid in sulphuric acid?

Consider the following statements

(i) $H_3{PO}_2$ is called phosphinic acid
(ii) Pyrophosphorous acid contains two $P-H$
bonds
(iii) Oxidation state of phosphorous in
hypophosphoric acid is +5
The correct statements are

Liquid oxygen:

When $S{O_2}$ is passed through acidified solution of ${H_2}S$ :