Oxygen and Sulphur MCQs [Chemistry]

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

Set of Important MCQs on the Chemistry of Oxygen And Sulphur in inorganic chemistry for the preparation of tests.

The common oxidation states of group IVA elements are

  1. +4 only
  2. +2, +4
  3. +4, +6
  4. +6 only

Question’s Answer:+4, +6

HS acts as what kind of agent?

  1. Chlorinating agent
  2. Oxidizing agent
  3. Reducing agent
  4. None of A, B, and C

Question’s Answer:Reducing agent

What is the commonly used catalyst in the manufacture of H2SO4?

  1. Fe2O3 with a little CuO
  2. V₂O5
  3. Platinized asbestos and MgSO4
  4. All A, B, and C

Question’s Answer: All A, B, and C

What are the geometry and dipole moment of O3?

  1. Angular and non-zero
  2. Angular and zero
  3. Linear and zero
  4. Linear and non-zero

Question’s Answer: Angular and non-zero

Molecule of oxygen is  __________.

  1. Paramagnetic
  2. Diamagnetic
  3. Ferromagnetic
  4. None of A, B, and C

Question’s Answer: Paramagnetic

What is the oxidation number of S in H2S?

  1. +2
  2. +1
  3. 1
  4. -2

Question’s Answer:-2

SO2 acts as what kind of acid or base?

  1. Lewis acid
  2. Lewis base
  3. Hard acid
  4. Hard base

Question’s Answer: Lewis base

What is the structure of SO2?

  1. V-shaped

B: Angular

  1. Linear
  2. Planner

Question’s Answer: V-shaped

The gaseous mixture of N2O and O2 is used as_____ .

  1. Fuel
  2. Anesthetic
  3. Oxidizing agent
  4. Reducing agent

Question’s Answer: Anesthetic

The H₂SO, gained by the contact process having purity

  1. 70%
  2. 74%
  3. 82%
  4. 78%

Question’s Answer: 78%

The contact process is generally used when acid is required for the manufacture of _________.

  1. Lead accumulators
  2. Fine chemicals
  3. Explosives
  4. All A, B, and C

Question’s Answer: All A, B, and C

The specific gravity of H2SO4 is

  1. 1.84
  2. 1.37
  3. 1.17
  4. 1.57

Question’s Answer: 1.84

When H₂SO, is used?

  1. In the dental filling
  2. In the purification of gold and silver
  3. In the preparation of aqua regia
  4. None of A, B, and C

Question’s Answer: None of A, B, and C

Perdisulphuric acid is ______ .

  1. H-acid
  2. Caro acid
  3. Marshal
  4. None of A, B, and C

Question’s Answer: Marshal

Black and white photographic film contain small grains of which of the following?

  1. Silver chloride
  2. Silver bromide
  3. Silver iodide
  4. Any of A, B, and C

Question’s Answer: Silver bromide

Which electronic configuration belongs to an element of group 16?

  1. [He] 2s2 2p2
  2. [Ar] 3d10 4s2 4p6
  3. [Ar] 3d5 4s1
  4. [Ne] 3s2 3p4

Question’s Answer: [Ne] 3s2 3p4

O2 molecule is ___ .

  1. Paramagnetic
  2. Ferromagnetic
  3. Ferrmagnetic
  4. Diamagnetic

Question’s Answer: Paramagnetic

Thermal stability of hydrides of group 16 elements decreases in the following order.

  1. H₂Po > H₂Te> H₂Se > H₂S. H₂O
  2. H₂S > H₂Se> H₂O > H₂Te > H₂Po
  3. H₂O > H₂S > H₂Se > H₂Te > H₂Po
  4. H₂S > H₂Se > H₂Te > H₂O > H₂Po

Question’s Answer: H₂O > H₂S > H₂Se > H₂Te > H₂Po

Which types of halides are formed by member of group IVA?

  1. MX2
  2. MX4
  3. MX6
  4. All A, B, and C

Question’s Answer:cAll A, B, and C

How many elements in Group IV A?

  1. 5
  2. 4
  3. 3
  4. 6

Question’s Answer: 5

What is Electronegativity of oxygen?

  1. 3.5
  2. 2.5
  3. 5.3
  4. 2.1

Question’s Answer: 3.5

Which of the mentioned is not true for ozone?

  1. It is a strong sterilizing agent
  2. It attacks organic compounds containing carbon-carbon double bond
  3. Its molecular is linear and has two different 0-0 bond lengths
  4. It is more powerful oxidizing agent at molecular oxygen

Question’s Answer: Its molecular is linear and has two different 0-0 bond lengths

What trend is observed in ionization energy of group IVA elements down the group?

  1. Increases down the group
  2. First decreases then increase down the group
  3. Decreases down the group
  4. Remains constant

Question’s Answer: Decreases down the group

Which compound is formed when S is boiled with Na2SO3 solution?

  1. Na2S2O3
  2. Na2SO4
  3. Na2S2O8
  4. Na2S

Question’s Answer: Na2S2O3

What is the final acid gained during the manufacturing of sulfuric acid is

  1. Con. H2SO4
  2. H2S2O7
  3. Dil. H2SO4
  4. H2S2O6

Question’s Answer: H2S2O7

Which of the mentioned is wrong?

  1. H2O2 is a planar molecule
  2. Water is more polar than H₂S
  3. Heavy water is produced by the exhaustive electrolysis of water made acidic
  4. H2O2 acts both as oxidizing as well as reducing agent in acidic medium

Question’s Answer: H2O2 is a planar molecule

Oxalic acid when heated with conc. H₂SO4 it gives out

  1. H₂O and CO2
  2. Oxalic sulphate
  3. CO2 and H2S
  4. CO and CO₂

Question’s Answer: CO and CO₂

Select the wrong statement for SO2

  1. It turns filter paper moistened with acidified K2Cr2O7
  2. It turns starch iodate paper blue
  3. It does not react with chlorine in presence of charcoal
  4. It decolorizes acidified KMnO4 solution

Question’s Answer It does not react with chlorine in presence of charcoal

B.P of heavy water is __________ .

  1. Equal to that of ordinary water
  2. Less than that of ordinary water
  3. Greater than that of ordinary water
  4. Equal to that of distilled water

Question’s Answer: Greater than that of ordinary water

Ozone is not ______.

  1. An allotrope
  2. A powerful oxidizing agent
  3. A bent molecule
  4. Paramagnetic

Question’s Answer: Paramagnetic

Which of the mentioned statements about the manufacture of H2SO4 by contact process is not true?

  1. S is burnt in air to form SO2
  2. SO2 is oxidized to SO3 in presence of V2O5 as catalyst (or finely divided spongy platinum as catalyst) at a pressure of 2 atom and a temperature of about 700 K
  3. SO3 is dissolved in H2O to get 100% H2SO4 acid
  4. H2SO4 gained by contact process is of higher purity than that gained by lead chamber process

Question’s Answer: SO3 is dissolved in H2O to get 100% H2SO4 acid

The hybridization of S in SO2 is

  1. sp
  2. sp3
  3. dsp2
  4. sp2

Question’s Answer: sp2

Which one of the following has the highest boiling point?

  1. H₂S
  2. H₂O
  3. H₂Se
  4. H₂Te

Question’s Answer :H₂O

Which of the mentioned compounds is most acidic?

  1. H₂O
  2. H₂S
  3. H₂Te
  4. H₂Se

Question’s Answer: H₂Te

Which of the mentioned represents the fuming sulphuric acid (oleum or pyrosulphuric acid)?

  1. H2S2O7
  2. H2S2O3
  3. H₂S₂O8
  4. H2S2O4

Question’s Answer:H2S2O7

Hypo is used in photography to

  1. Remove undecomposed silver bromide as soluble complex
  2. Remove silver as silver salt
  3. Reduce AgBr to metallic silver
  4. Remove reduced silver

Question’s Answer: Remove undecomposed silver bromide as soluble complex

Select the ideal conditions required for the manufacture of H2SO4 by contact process.

  1. Low temperature, high pressure and high concentration of reactants
  2. Low temperature, low concentration of reactants and low pressure
  3. High temperature, high pressure and high concentration of reactants
  4. Low temperature, low pressure and high concentration of reactants

Question’s Answer: Low temperature, high pressure and high concentration of reactants

Ozone is an important constituent of stratosphere, because it

  1. Prevents the formation of smog over large cities
  2. Remove poisonous gases of the atmosphere by reacting with them
  3. Destroys bacteria, which are harmful to human life.
  4. Absorbs ultraviolet radiation, which is harmful to human life

Question’s Answer: Absorbs ultraviolet radiation, which is harmful to human life

Which members of this group show the property of catenation?

  1. O and S
  2. S and Se
  3. O and Se
  4. O and Po

Question’s Answer: O and S

Which among the following is a false statement?

  1. SO3 is gained by the catalytic oxidation of SO2
  2. SO3 has trigonal planar geometry is gaseous state
  3. SO3 in gaseous state has all S-O bonds equivalent
  4. SO3 gas shows more solubility in water than in H₂SO4

Question’s Answer:SO3 gas shows more solubility in water than in H₂SO4

The oxidation number of S in H₂SO4 is

  1. +3
  2. +4
  3. +6
  4. +5

Question’s Answer:+6

Which of the mentioned is a thionic acid?

  1. H2S2O6
  2. H2S2O3
  3. H2S2O8
  4. H2S2O7

Question’s Answer: H2S2O6

Arrange the acidic tendencies of the following non-metallic oxides in decreasing order.

  1. SO3 > N2O5 > SiO2 > CO2 > H₂O
  2. SO3 > N2O5> CO₂ > SiO2 > H₂O
  3. SO3 > SiO2 > N2O5 > CO₂ > H2O
  4. SO3 > CO2 > N2O5 > SiO2 > H₂O

Question’s Answer:SO3 > N2O5> CO₂ > SiO2 > H₂O

Which of the mentioned metals gives SO2 when treated with sulfuric acid?

  1. Ag
  2. Cu
  3. Both A & B
  4. None of A, B, and C

Question’s Answer: Both A & B

Which of the mentioned statement about SO2 is not true?

  1. It is liquid at room temperature
  2. It is typically basic oxid
  3. On heating it
  4. It is absorbed in con. sulfuric acid to give oleum

Question’s Answer: It is typically basic oxid

Which of the mentioned is a peroxy acid?

  1. H₂S2O7
  2. H2S2O6
  3. H2SO4
  4. H₂SO5

Question’s Answer: H₂SO5

Which of the mentioned statement is not true about the sulfuric acid?

  1. It shows acidic property
  2. It shows reducing property
  3. It shows dehydrating property
  4. It shows oxidizing property

Question’s Answer: It shows reducing property

What is the general formula of thionic acids?

  1. H6SnO2
  2. H3SnO6
  3. H2SnO6
  4. H2SnO5

Question’s Answer: H2SnO6

Which of the mentioned compound  has O- O-linkage?

  1. H2S2O6
  2. H2S2O8
  3. H2S2O3
  4. H2S4O6

Question’s Answer: H2S2O8

Which of the mentioned compounds has peroxo-linkage?

  1. H₂S4O6
  2. H₂S₂O5
  3. H₂SO6
  4. H₂S₂O₂

Question’s Answer: H₂SO6

Aqueous solution of H2O2 is acidic

  1. Strongly
  2. Weakly
  3. Basic
  4. Neutral

Question’s Answer: Weakly

Sulfuric acid reacts with PCl5 to give ________ .

  1. Thionyl chloride
  2. Sulfur teterachloride
  3. Sulfuryl chloride
  4. Sulfur monochloride

Question’s Answer: Sulfuryl chloride

 

Hydrides of group 16 are weakly acidic in nature. The accurate order of acidity is

  1. H₂O > H₂S > H₂Se > H₂Te
  2. H₂Te > H₂O > H₂S > H₂Se
  3. H₂Te > H₂Se > H₂O> H₂S
  4. H₂Te> H2Se > H₂S > H₂O

Question’s Answer: H₂Te> H2Se > H₂S > H₂O

Which of the mentioned compounds does not exist?

  1. SO2Cl2
  2. SCI6
  3. SCI4
  4. S2Cl2

Question’s Answer: SCI6

Which of the mentioned reactions is employed to produce ozone in the laboratory

  1. Exposure of air to UV light
  2. Reaction of F2 with H2O at low temperature
  3. Reaction of SO2 with H2O2
  4. Passage of silent electric discharge through oxygen

Question’s Answer: Passage of silent electric discharge through oxygen

More Inorganic Chemistry MCQs

  1. Chemical Bonding MCQs
  2. Acids and Bases in inorganic chemistry MCQs
  3. Boron And Aluminum MCQs
  4. Carbon and Silicon MCQs
  5. Hydrogen, Alkali, and Alkaline Earth Metals MCQs
  6. D-Block Elements MCQs [Chemistry]
  7. F-Block Elements MCQs
  8. Halogens MCQs
  9. Inert Gases MCQs
  10. Nitrogen and Phosphorus MCQs
  11. Oxygen and Sulphur MCQs
  12. Experimental Inorganic Chemistry MCQs
  13. Periodic Classification Of Elements And Periodicity Of Properties MCQs
  14. CHEMISTRY MCQs From all subjects of  Chemistry

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