Group 16 (p-Block Elements)

1

Which of the following statements regarding group 16 elements is not true?

1

ASSERTION (A): By mass, oxygen is the most abundant element in the human body.
REASON (R): It is principally found as O₂ in the bloodstream.

2

Which of the following gasses is heavier than air?

2

The formation of O⁻ is ( exothermic, endothermic ), whereas the formation of O⁻² is ( exothermic, endothermic ).

1

The formation of the oxide ion, O²⁻(g), from oxygen atom requires first, and exothermic and then an endothermic reaction as shown below:
O(g) + e⁻ → O⁻(g) ; ΔfH⁻ = -141kJ mol⁻¹
O(g) + e⁻ → O²⁻(g) ; ΔfH⁻ = +780kJ mol⁻¹
Thus, process of formation of O²⁻ in gas phase is not favourable even though O²⁻ is isoelectronic with neon. It is due to the fact that:

1

ASSERTION (A): Both rhombic and monoclinic sulphur exist as S₈, but oxygen exists as O₂.
REASON (R): Oxygen forms pπ-pπ multiple bond due to small size and small bond length but pπ-pπ bonding is not possible in sulphur.

1

The allotrope of oxygen is the primary absorber of UV solar radiation in Earth's atmosphere.

1

What is the correct order of reactivity of group 16 elements?

1

The hybridisation state of the central atom and shape of the molecules is given below. Mark the incorrect combination.

1

What is the hybridisation state and oxidation state of sulphur in Caro's acid?

2

Choose the correct order(s) of hydrolysis at room temperature.

1

What is the general outer electronic configuration of the Oxygen family?

1

The ratio of sulphur in SO₂ and SO₃ molecules is 2:1.

1

Oxidation number of S in S₂Cl₂ is .

1

Name this oxoacid which is also know as Oleum.

1

Sulphuric acid has:

3

Ozone (O₃) can be used as/for:

1

XII Chemistry Test sobre Group 16 (p-Block Elements), creado por Priyal Agarwal el 10/05/2021.

Group 16 (p-Block Elements)

Which of the following statements regarding group 16 elements is not true?

ASSERTION (A): By mass, oxygen is the most abundant element in the human body. REASON (R): It is principally found as O₂ in the bloodstream.

Which of the following gasses is heavier than air?

The formation of O⁻ is exothermic endothermic( exothermic, endothermic ), whereas the formation of O⁻² is exothermic endothermic( exothermic, endothermic ).

ASSERTION (A): Both rhombic and monoclinic sulphur exist as S₈, but oxygen exists as O₂. REASON (R): Oxygen forms pπ-pπ multiple bond due to small size and small bond length but pπ-pπ bonding is not possible in sulphur.

The allotrope of oxygen is the primary absorber of UV solar radiation in Earth's atmosphere.

What is the correct order of reactivity of group 16 elements?

The hybridisation state of the central atom and shape of the molecules is given below. Mark the incorrect combination.

What is the hybridisation state and oxidation state of sulphur in Caro's acid?

Choose the correct order(s) of hydrolysis at room temperature.

What is the general outer electronic configuration of the Oxygen family?

The ratio of sulphur in SO₂ and SO₃ molecules is 2:1.

Oxidation number of S in S₂Cl₂ is .

Name this oxoacid which is also know as Oleum.

Sulphuric acid has:

Ozone (O₃) can be used as/for:

If a species has 16 protons, 18 electrons and 16 neutrons, then find the species and its charge.

Which of the following non-metal possesses the highest atomicity?

The bond angle between F OO in O₂F₂ is:

ASSERTION (A): By mass, oxygen is the most abundant element in the human body.
REASON (R): It is principally found as O₂ in the bloodstream.

The formation of O⁻ is ( exothermic, endothermic ), whereas the formation of O⁻² is ( exothermic, endothermic ).

ASSERTION (A): Both rhombic and monoclinic sulphur exist as S₈, but oxygen exists as O₂.
REASON (R): Oxygen forms pπ-pπ multiple bond due to small size and small bond length but pπ-pπ bonding is not possible in sulphur.