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Inorganic Chemistry (p - Block Elements)

Description: Inorganic Chemistry (P - Block Elements) - Free Online Tests P Block Elements for Class XI/XII and Study Materials for P-Block Elements
Number of Questions: 25
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Tags: Chemistry INORGANIC CHEMISTRY P - BLOCK ELEMENTS General Properties of Group 15 Elements Oxides of Nitrogen P-Block Elements p-Block Elements Inorganic Chemistry
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What is the oxidation state of nitrogen in nitrogen dioxide?

    • 1
    • 2
    • 3
    • 4

Correct Option: D
Explanation:

Ans : 4.

Brown ring test is for

  1. nitric acid

  2. nitrate

  3. nitrous oxide

  4. nitrogen


Correct Option: B
Explanation:

Ans : 2.

Directions: The following question has four choices out of which ONLY ONE is correct.

The oxidation state of nitrogen in dinitrogen oxide is

    • 1
    • 2
    • 3
    • 4

Correct Option: A
Explanation:

Dinitrogen oxide, N2O 2x + (-2) = 0 So, x = +1

White phosphorous readily catches fire in air and is unstable due to

  1. affinity for oxygen

  2. angular strain

  3. both (1) and (2)

  4. neither (1) nor (2)


Correct Option: C
Explanation:

Ans : 3.

Aqua regia is

  1. nitrous oxide and water

  2. sulphuric acid and water

  3. nitric acid and water

  4. ammonia and water


Correct Option: C
Explanation:

Ans : 3.

The gas which is highly poisonous is

  1. nitrogen

  2. carbon dioxide

  3. chlorine

  4. phosphine


Correct Option: D
Explanation:

Ans : 4.

The bond angle in white phosphorous, in degrees, is

  1. 104

  2. 109

  3. 180

  4. 60


Correct Option: D
Explanation:

Ans : 4.

The shape of phosphorous pentachloride is

  1. trigonal bipyramidal

  2. trigonal pyramidal

  3. pentagonal

  4. none of the above


Correct Option: A
Explanation:

Ans ; 1.

When phosphorous pentachloride is heated, one of the products is

  1. chloride ion

  2. chlorine

  3. hydrogen chloride

  4. no change is observed


Correct Option: B
Explanation:

Ans : 2.

Among the five bonds in phosphorous pentachloride

  1. all are equivalent

  2. three bonds are axial and two are equatorial

  3. two bonds are axial and three are equatorial

  4. all the bonds are unequal


Correct Option: C
Explanation:

Ans : 3.

In orthophosphorous, the oxidation state of phosphorous is

    • 1
    • 2
    • 3
    • 4

Correct Option: C
Explanation:

Ans : 3.

The basicity of orthophosphoric acid is

  1. 1

  2. 2

  3. 3

  4. 4


Correct Option: C
Explanation:

Ans : 3.

What is the covalency of oxygen?

  1. One

  2. Two

  3. Three

  4. Four


Correct Option: B
Explanation:

Ans : 2.

Stability of which of the following oxidation states increases down the group 16 of the periodic table?

    • 2
    • 2
    • 4
    • 4
    • 6

Correct Option: C
Explanation:

Ans : 3.

Why oxygen is diatomic while sulphur is polyatomic?

  1. Oxygen can form multiple bonds.

  2. Oxygen shows anomalous behaviour.

  3. Sulphur is more reactive than oxygen.

  4. The oxidation state of oxygen is two.


Correct Option: A
Explanation:

Ans : 1.

Pure ozone gas is

  1. dark blue

  2. pale blue

  3. voilet black

  4. colourless


Correct Option: B
Explanation:

Ans : 2.

Sulphuric acid is

  1. monoprotic acid

  2. diprotic acid

  3. triprotic acid

  4. none of the above


Correct Option: B
Explanation:

Ans : 2.

Sulphuric acid is not

  1. less volatile

  2. an oxiding agent

  3. a reducing agent

  4. a dehydrating agent


Correct Option: C
Explanation:

Ans : 3.

The process of manufacture of sulphuric acid is

  1. haber's process

  2. contact process

  3. ostwald process

  4. electrolysis


Correct Option: B
Explanation:

Ans : 2.

Oleum is prepared from

  1. sulphuric acid

  2. sulphur dioxide

  3. sulphur trioxide

  4. sulphur and water


Correct Option: C
Explanation:

Ans : 3.

Most of the reactions of fluorine are exothermic because

  1. of high I. E. of fluorine

  2. of small and strong bonds formed by fluorine

  3. of its small size

  4. of non-availability of d - orbitals


Correct Option: B
Explanation:

Ans : 2.

Which of the following is solid?

  1. Fluorine

  2. Chlorine

  3. Bromine

  4. Iodine


Correct Option: D
Explanation:

Ans : 4.

AgCl reacts with ammonia to give a

  1. colourless solution

  2. white precipitate

  3. yellow precipitate

  4. deep blue colour


Correct Option: A
Explanation:

Ans : 1.

The reactivity of dinitrogen is very low because

  1. in this the octet of both nitrogen atoms is complete

  2. nitrogen has no vacant d - orbital

  3. the maximum covalency of nitrogen is 4

  4. there is a triple bond between two nitrogen atoms


Correct Option: D
Explanation:

Ans : 4.

The basicity of polymetaphosphoric acid is

  1. 1

  2. 2

  3. 3

  4. 4

  5. none of the above


Correct Option: C
Explanation:

Ans : 3.

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