30954623
Description
Quiz by Priyal Agarwal, updated more than 1 year ago
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Created by Priyal Agarwal
about 3 years ago
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Copied by Priyal Agarwal
about 3 years ago
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Question 1
Question
Which of the following statements regarding group 16 elements is not true?
Answer
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The electronic configuration of Oxygen is [He]2s² 2p⁴.
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The atomic radii of the elements of group 16 are larger than those of the corresponding elements of group 15.
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The electronic configuration of Tellurium is [Kr]4d¹⁰ 5s² 5p⁴.
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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
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Both ASSERTION and REASON are true, and REASON is the correct explanation of ASSERTION.
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Both ASSERTION and REASON are true, but REASON is not the correct explanation of ASSERTION.
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ASSERTION is true, but REASON is false.
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ASSERTION is false, but REASON is true.
Question 3
Question
Which of the following gasses is heavier than air?
Answer
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N₂
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O₂
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CO₂
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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
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exothermic
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endothermic
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exothermic
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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
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electron repulsion outweighs the stability gained by noble gas configuration
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oxygen is more electronegative.
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addition of electron in oxygen results in larger size of the ion.
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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
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Both ASSERTION and REASON are true, and REASON is the correct explanation of ASSERTION.
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Both ASSERTION and Reason are true, but REASON is not the correct explanation of ASSERTION.
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ASSERTION is true, but REASON is false.
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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
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S > O > Se > Te > Po
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O > Se > S > Te > Po
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O > S > Se > Te > Po
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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
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SO₃ → sp² hybridisation, planar triangular
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SO₂ → sp² hybridisation, V-shaped
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H₂SO₄ → sp² hybridisation, V-shaped
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O₃ → sp² hybridisation, angular
Question 10
Question
What is the hybridisation state and oxidation state of sulphur in Caro's acid?
Answer
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sp² + 10
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sp³ + 10
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sp² + 6
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sp³ + 6
Question 11
Question
Choose the correct order(s) of hydrolysis at room temperature.
Answer
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SF₄ < SF₆
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TeF₆ > Sef₆
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TeF₆ < SeF₆
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SF₄ > SF₆
Question 12
Question
What is the general outer electronic configuration of the Oxygen family?
Answer
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ns²np⁴
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ns²np³
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ns²np⁵
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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
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+1
Question 15
Answer
-
Pyrosulphuric Acid
Question 16
Question
Sulphuric acid has:
Answer
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low volatility
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strong affinity for water
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ability to act as an oxidising agent
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All of these
Question 17
Question
Ozone (O₃) can be used as/for:
Answer
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sterilising water
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manufacturing nitrocellulose products
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disinfectant
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refining petroleum
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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
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S¹⁻
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Si²⁻
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P³⁻
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S²⁻
Question 19
Question
Which of the following non-metal possesses the highest atomicity?
Answer
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Oxygen
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Phosphorous
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Sulphur
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Nitrogen
Question 20
Question
The bond angle between F OO in O₂F₂ is:
Answer
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109°3'
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120°
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90°
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180°
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