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Group 16 (p-Block Elements)

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XII Chemistry Quiz on Group 16 (p-Block Elements), created by Priyal Agarwal on 10/05/2021.
Priyal Agarwal
Quiz by Priyal Agarwal, updated more than 1 year ago More Less
Priyal Agarwal
Created by Priyal Agarwal over 3 years ago
Priyal Agarwal
Copied by Priyal Agarwal over 3 years ago
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Question 1

Question
Which of the following statements regarding group 16 elements is not true?
Answer
  • The electronic configuration of Oxygen is [He]2s² 2p⁴.
  • The atomic radii of the elements of group 16 are larger than those of the corresponding elements of group 15.
  • The electronic configuration of Tellurium is [Kr]4d¹⁰ 5s² 5p⁴.
  • The electronic configuration of Sulphur is [Ne]3s² 3p⁴.

Question 2

Question
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.
Answer
  • Both ASSERTION and REASON are true, and REASON is the correct explanation of ASSERTION.
  • Both ASSERTION and REASON are true, but REASON is not the correct explanation of ASSERTION.
  • ASSERTION is true, but REASON is false.
  • ASSERTION is false, but REASON is true.

Question 3

Question
Which of the following gasses is heavier than air?
Answer
  • N₂
  • O₂
  • CO₂
  • H₂

Question 4

Question
The formation of O⁻ is [blank_start]exothermic[blank_end], whereas the formation of O⁻² is [blank_start]endothermic[blank_end].
Answer
  • exothermic
  • endothermic
  • exothermic
  • endothermic

Question 5

Question
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:
Answer
  • electron repulsion outweighs the stability gained by noble gas configuration
  • oxygen is more electronegative.
  • addition of electron in oxygen results in larger size of the ion.
  • O⁻ ion has comparatively smaller size than oxygen atom.

Question 6

Question
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.
Answer
  • Both ASSERTION and REASON are true, and REASON is the correct explanation of ASSERTION.
  • Both ASSERTION and Reason are true, but REASON is not the correct explanation of ASSERTION.
  • ASSERTION is true, but REASON is false.
  • ASSSERTION is false, but REASON is true.

Question 7

Question
The allotrope of oxygen is the primary absorber of UV solar radiation in Earth's atmosphere.
Answer
  • True
  • False

Question 8

Question
What is the correct order of reactivity of group 16 elements?
Answer
  • S > O > Se > Te > Po
  • O > Se > S > Te > Po
  • O > S > Se > Te > Po
  • S > O > Te > Po > Se

Question 9

Question
The hybridisation state of the central atom and shape of the molecules is given below. Mark the incorrect combination.
Answer
  • SO₃ → sp² hybridisation, planar triangular
  • SO₂ → sp² hybridisation, V-shaped
  • H₂SO₄ → sp² hybridisation, V-shaped
  • O₃ → sp² hybridisation, angular

Question 10

Question
What is the hybridisation state and oxidation state of sulphur in Caro's acid?
Answer
  • sp² + 10
  • sp³ + 10
  • sp² + 6
  • sp³ + 6

Question 11

Question
Choose the correct order(s) of hydrolysis at room temperature.
Answer
  • SF₄ < SF₆
  • TeF₆ > Sef₆
  • TeF₆ < SeF₆
  • SF₄ > SF₆

Question 12

Question
What is the general outer electronic configuration of the Oxygen family?
Answer
  • ns²np⁴
  • ns²np³
  • ns²np⁵
  • ns²np²

Question 13

Question
The ratio of sulphur in SO₂ and SO₃ molecules is 2:1.
Answer
  • True
  • False

Question 14

Question
Oxidation number of S in S₂Cl₂ is [blank_start]+1[blank_end].
Answer
  • +1

Question 15

Question
Name this oxoacid which is also know as Oleum.
Image:
Download (binary/octet-stream)
Answer
  • Pyrosulphuric Acid

Question 16

Question
Sulphuric acid has:
Answer
  • low volatility
  • strong affinity for water
  • ability to act as an oxidising agent
  • All of these

Question 17

Question
Ozone (O₃) can be used as/for:
Answer
  • sterilising water
  • manufacturing nitrocellulose products
  • disinfectant
  • refining petroleum
  • bleaching ivory, oils, flour, starch, etc.

Question 18

Question
If a species has 16 protons, 18 electrons and 16 neutrons, then find the species and its charge.
Answer
  • S¹⁻
  • Si²⁻
  • P³⁻
  • S²⁻

Question 19

Question
Which of the following non-metal possesses the highest atomicity?
Answer
  • Oxygen
  • Phosphorous
  • Sulphur
  • Nitrogen

Question 20

Question
The bond angle between F OO in O₂F₂ is:
Answer
  • 109°3'
  • 120°
  • 90°
  • 180°
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