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In the detection of the nitrate ion, a brown complex in the form of a brown ring is formed at the junction of the two liquids. How many unpaired electrons does this brown complex contain?

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Important Questions on p- Block Elements

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:

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

The most stable Lewis acid-base adduct among the following is

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:

MEDIUM

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

Strong reducing behaviour of

H_{3} P O_{2}

is due to:

HARD

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

Consider the following compounds:

1 . {(N H_{4})}_{2} C r_{2} O_{7}

2 . N H_{4} N O_{2}

3 . N H_{4} V O_{3}

4 . N H_{4} N O_{3}

Which compound(s) yield(s) nitrogen gas upon heating?

MEDIUM

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

Among the oxides of nitrogen:

N_{2} O_{3}, N_{2} O_{4} a n d N_{2} O_{5};

the molecule

(s)

having nitrogen - nitrogen bond is/are:

MEDIUM

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

The pair in which phosphorous atoms have a formal oxidation state of + 3 is:

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

When copper is heated with conc.

H N O_{3}

it produces:

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

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:

HARD

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

The number of

P - OH

bonds and the oxidation state of phosphorus atom in pyrophosphoric acid

(H_{4} P_{2} O_{7})

, respectively are:

MEDIUM

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

Consider the following statements concerning

N_{2} H_{4} :

(i) It is an exothermic compound.

(ii) It burns in air with the evolution of heat.

(iii) It has kinetic stability.

(iv) It reduces

F e^{3 +}

F e^{2 +}

in acidic medium.

Which of the following combinations is correct?

MEDIUM

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

The compound that does not produce nitrogen gas by thermal decomposition is:

EASY

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

The product formed in the reaction of

S O C l_{2}

with white phosphorous 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:

EASY

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

Among the following compounds, the one which does NOT produce nitrogen gas upon heating is

MEDIUM

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

Which of the following compounds has a

P - P

Bond?

EASY

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

Identify the correct statement from the statements given below.

In the detection of the nitrate ion, a brown complex in the form of a brown ring is formed at the junction of the two liquids. How many unpaired electrons does this brown complex contain?

Important Questions on p- Block Elements

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