P-block elements practice · Mixed difficulty

How many of the following given atomic number have noble gas configuration?
$56,57,70,80,24$

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 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 $\mathrm{PH}_3(\mathrm{~g})$

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

The van der Waal’s forces are the greatest in:

Which hydride has the lowest boiling point?

Bleaching powder is a mixture of:

Which is the most volatile compound?

Iodine is formed when potassium iodide reacts with a solution of

Pure nitrogen is prepared in the laboratory by heating a mixture of

Which gas is used to improve the atmosphere of crowded places?

Javelle water is:

White smoke is formed when ammonia gas meets with:

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

Oxide of nitrogen used as a catalyst in the lead chamber process for the manufacture of sulphuric acid 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?

Most abundant element in earth’s crust is:

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 $\mathrm{NH}_3$.

The correct order of acid strength is

$HN{O_3}\;$ oxidises :

Coloured oxide is nitrogen is:

Hydrolysis of $P{I_3}$ yields:

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

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?