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Quiz von Priyal Agarwal, aktualisiert more than 1 year ago
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Frage 1
Frage
Which of the following statements regarding group 16 elements is not true?
Antworten
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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.
Frage 2
Frage
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.
Antworten
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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.
Frage 3
Frage
Which of the following gasses is heavier than air?
Antworten
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N₂
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O₂
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CO₂
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H₂
Frage 4
Frage
The formation of O⁻ is [blank_start]exothermic[blank_end], whereas the formation of O⁻² is [blank_start]endothermic[blank_end].
Antworten
-
exothermic
-
endothermic
-
exothermic
-
endothermic
Frage 5
Frage
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:
Antworten
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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.
Frage 6
Frage
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.
Antworten
-
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.
Frage 7
Frage
The allotrope of oxygen is the primary absorber of UV solar radiation in Earth's atmosphere.
Antworten
- True
- False
Frage 8
Frage
What is the correct order of reactivity of group 16 elements?
Antworten
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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
Frage 9
Frage
The hybridisation state of the central atom and shape of the molecules is given below. Mark the incorrect combination.
Antworten
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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
Frage 10
Frage
What is the hybridisation state and oxidation state of sulphur in Caro's acid?
Antworten
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sp² + 10
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sp³ + 10
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sp² + 6
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sp³ + 6
Frage 11
Frage
Choose the correct order(s) of hydrolysis at room temperature.
Antworten
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SF₄ < SF₆
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TeF₆ > Sef₆
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TeF₆ < SeF₆
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SF₄ > SF₆
Frage 12
Frage
What is the general outer electronic configuration of the Oxygen family?
Antworten
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ns²np⁴
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ns²np³
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ns²np⁵
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ns²np²
Frage 13
Frage
The ratio of sulphur in SO₂ and SO₃ molecules is 2:1.
Antworten
- True
- False
Frage 14
Frage
Oxidation number of S in S₂Cl₂ is [blank_start]+1[blank_end].
Antworten
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+1
Frage 15
Antworten
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Pyrosulphuric Acid
Frage 16
Frage
Sulphuric acid has:
Antworten
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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
Frage 17
Frage
Ozone (O₃) can be used as/for:
Antworten
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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.
Frage 18
Frage
If a species has 16 protons, 18 electrons and 16 neutrons, then find the species and its charge.
Antworten
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S¹⁻
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Si²⁻
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P³⁻
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S²⁻
Frage 19
Frage
Which of the following non-metal possesses the highest atomicity?
Antworten
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Oxygen
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Phosphorous
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Sulphur
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Nitrogen
Frage 20
Frage
The bond angle between F OO in O₂F₂ is:
Antworten
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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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