EASY

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The brown ring test is performed for the qualitative detection of:

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Important Questions on p- Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

How many gm of the oxidising agent gets reduced in the reaction of $65.4 gm$ of $Zn$ with concentrated nitric acid?

[Atomic mass $[Zn = 65.4, N = 14, H = 1, O = 16 gm {mol}^{- 1}]$ ]

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

When copper is heated with conc.

H N O_{3}

it produces:

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Which of the following chemicals DOES NOT liberate hydrogen gas on reaction with Aluminum metal?

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

The product obtained as a result of a reaction of nitrogen with

C a C_{2}

is:

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Brown ring test is to detect the presence of

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

In brown ring test for nitrate ions, brown ring is formed having composition

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

When

{PbO}_{2}

reacts with concentrated

{HNO}_{3}

, the gas evolved is

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

The pair that contains two

P - H

bonds in each of the oxoacids is:

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

What are $X$ and $Y$ , respectively in the following reactions ?

$Au + aqua regia ⟶ {AuCl}_{4}^{-} + H_{2} O + X$

$Pt + aqua regia ⟶ {PtCl}_{6}^{2 -} + H_{2} O + Y$

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Sulphur reacts with conc.

{HNO}_{3}

to form

H_{2} {SO}_{4}, H_{2} O

and

X (g)

. The liberated

X (g)

was passed into water to form

Y (g)

and

{HNO}_{3} .

What is

Y

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Identify the correct statement from the statements given below.

HARD

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Iodine reacts with concentrated

H N O_{3}

to yield

Y

along with other products. The oxidation state of iodine in

Y

, is:

HARD

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

An inorganic Compound

' X'

on treatment with concentrated

H_{2} {SO}_{4}

produces brown fumes and gives dark brown ring with

{FeSO}_{4}

in presence of concentrated

H_{2} {SO}_{4}

. Also Compound

' X'

gives precipitate

' Y'

, when its solution in dilute

HCl

is treated with

H_{2} S

gas. The precipitate

' Y'

on treatment with concentrated

{HNO}_{3}

followed by excess of

{NH}_{4} OH

further gives deep blue coloured solution, Compound

' X'

is:

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Good reducing nature of

H_{3} P O_{2}

is attributed to the presence of:

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Strong reducing behaviour of

H_{3} P O_{2}

is due to:

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

The total number of compounds having at least one bridging oxo group among the molecules given below is
$N_{2} O_{5}, P_{4} O_{6}, P_{4} O_{8}, H_{4} P_{2} O_{5}, H_{5} P_{3} O_{10}, H_{2} S_{2} O_{3}, H_{2} S_{2} O_{5}$

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

How can you synthesise nitric oxide in the laboratory ?

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

Aqua regia is used for dissolving noble metals (Au, Pt, etc.). The gas evolved in this process is

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Properties of Compounds of Nitrogen

The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:

The brown ring test is performed for the qualitative detection of:

Important Questions on p- Block Elements

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