MCQ on Hydrogen Class 11. We covered all the MCQ on Hydrogen Class 11 in this post for free so that you can practice well for the exam.
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MCQ on Hydrogen for NEET Students
Which one of the following shows that hydrogen does NOT resemble alkali metals?
(A) Very high ionization enthalpy value
(B) Formation of oxides
(C) Tendency to form unipositive ion
(D) Formation of chlorides
Option a – Very high ionization enthalpy value
Hydrogen as a fuel has many advantages over conventional fossil fuels. Which of the following is NOT the advantage of hydrogen being used as a fuel?
(A) It is pollution free and thus it is considered a green fuel.
(B) It releases greater energy per unit weight compared to gasoline and other fuels.
(C) It can be transported in the form of a solid as a metal hydride.
(D) It is a cheaper source of fuel compared to fossil fuels.
Option d – It is a cheaper source of fuel compared to fossil fuels.
The number of moles of dihydrogen formed when one mole of zinc metal reacts with an excess of aqueous sodium hydroxide solution is ……….
(A) 1
(B) 2
(C) 3
(D) 4
Option a – 1
Identify the CORRECT statements. (I) In non-stoichiometric hydrides, the law of constant composition is always valid. (II) Atomic hydrogen is obtained by passing dihydrogen through an electric arc at a high temperature. (III) Metals such as Pd and Pt can be used as storage media for hydrogen.
(A) (I) and (II)
(B) (II) and (III)
(C) (I) and (III)
(D) (I), (II) and (III)
Option b – (II) and (III)
Dihydrogen gas of high purity (>99.95%) is obtained by electrolysis of ………
(A) the melt of sodium hydride
(B) brine solution
(C) acidified water
(D) aqueous barium hydroxide solution
Option d – aqueous barium hydroxide solution
Oil paintings are blackened by atmospheric H₂S, due to the formation of A. H₂O₂ changes A to B, which is colorless (white). ‘A’ and ‘B’ respectively are ………
(A) PbS and PbSO3
(B) PbS and PbSO4
(C) PbS and PbO
(D) PbSO4 and PbS
Option b – PbS and PbSO4
Which of the following is NOT a water softener?
(A) Synthetic resins
(B) Permutit
(C) Na₂CO3
(D) Na₂SO4
Option d – Na₂SO4
Which of the following hydrogen peroxide solution is approximately 1.79 M?
(A) 10-volume solution of hydrogen peroxide
(B) 20-volume solution of hydrogen peroxide
(C) 30-volume solution of hydrogen peroxide
(D) 40-volume solution of hydrogen peroxide
Option b – 20-volume solution of hydrogen peroxide
Identify the CORRECT statement regarding isotopes of hydrogen.
(A) Among the three isotopes, only tritium is radioactive.
(B) Protium has one neutron while deuterium has two neutrons.
(C) The relative abundance (%) of tritium is more than deuterium.
(D) Protium, deuterium, and tritium have different electronic configurations.
Option a – Among the three isotopes, only tritium is radioactive.
Which of the following has a polymeric structure?
(A) LiH
(B) NaH
(C) BeH₂
(D) CH4
Option c – BeH₂
The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na (mol. wt. 206). What would be the maximum uptake of Ca²+ ions by the resin when expressed in moles per 100 grams of resin?
(A) 0.12
(B) 0.15
(C) 0.20
(D) 0.24
Option d – 0.24
Assertion: Covalent compounds like alcohol and carbohydrates dissolve in water. Reason: Hydrogen bonds are formed between molecules of water and molecules of these compounds.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, Reason is true.
Option a – Assertion and Reason are true. The reason is the correct explanation of the Assertion.
The set of elements that could form saline hydrides is ………
(A) nitrogen, oxygen, and fluorine
(B) lithium, sodium, and potassium
(C) sulphur, selenium, and tellurium
(D) chlorine, bromine, and iodine
Option b – lithium, sodium, and potassium
When hard water containing magnesium chloride is treated with washing soda, ………. is formed.
(A) magnesium carbonate
(B) magnesium sulphate
(C) magnesium hydroxide
(D) magnesium oxide
Option a – magnesium carbonate
Compound ‘A’ undergoes slow decomposition on exposure to light to give ‘B’ and ‘C’. ‘B’ in reaction with calcium nitride forms calcium hydroxide and ammonia. ‘A’, ‘B’, and ‘C’ are ……… respectively.
(A) hydrogen peroxide, hydrogen, and oxygen
(B) hydrogen peroxide, water, and oxygen
(C) hydrogen peroxide, water, and hydrogen
(D) hydrogen peroxide, oxygen, and water
Option b – hydrogen peroxide, water, and oxygen
Which of the following metals will NOT reduce H₂O?
(A) Ca
(B) Na
(C) Cu
(D) Li
Option c – Cu
The approximate mass of H₂O₂ present in 500 mL of 100 volume H₂O₂ in grams is ………
(A) 15
(B) 75
(C) 152
(D) 170
Option c – 152
The dihedral angle in solid phase H₂O₂ at 110 K is ……..
(A) 90.2°
(B) 94.8°
(C) 101.9°
(D) 111.5°
Option a – 90.2°
Statement (I): Calcium and magnesium ions present in hard water react with soap to form insoluble precipitates. Statement (II): Temporary hardness of water is due to the presence of chlorides and sulphates of calcium and magnesium. Statement (III): The process of the removal of hardness from water is called softening of water. Select the most appropriate option.
(A) Statements (I) and (II) are correct.
(B) Statements (I) and (II) are incorrect.
(C) Statements (I) and (III) are incorrect.
(D) Statements (I) and (III) are correct.
Option d – Statements (I) and (III) are correct.
Identify the CORRECT statement regarding BaCl₂.2H₂O.
(A) All the water molecules are coordinated with the metal ion.
(B) It is a hydrated salt having interstitial water.
(C) It is a hydrated salt having hydrogen-bonded water.
(D) One water molecule is hydrogen-bonded while the other water molecule is coordinated.
Option b – It is a hydrated salt having interstitial water.
The number of neutrons in a molecule of T₂ is ……….
(A) 1
(B) 2
(C) 3
(D) 4
Option d – 4
Identify the INCORRECT statement.
(A) The advantage of a hydrogen economy is that energy is transmitted in the form of electric power and not as dihydrogen.
(B) When hard water containing calcium bicarbonate is treated with a calculated amount of calcium hydroxide, calcium carbonate precipitates out.
(C) Hard water does not give a lather with soap while soft water easily gives a lather with soap.
(D) The use of dihydrogen as a fuel releases fewer pollutants into the atmosphere as compared to petrol.
Option a – The advantage of a hydrogen economy is that energy is transmitted in the form of electric power and not as dihydrogen.
Which of the following statements is CORRECT? (I) Electron-rich hydrides can act as Lewis acids. (II) Elements of group 14 form electron-precise hydrides. (III) Electron-deficient hydrides can act as Lewis acids. (IV) Ionic hydrides are stoichiometric compounds. (V) Molecular hydrides are non-volatile compounds.
(A) (I), (II) and (IV)
(B) (II) and (IV)
(C) (II), (III) and (IV)
(D) (I), (II), (IV) and (V)
Option c – (II), (III) and (IV)
At atmospheric pressure, ice crystallizes in the ……. form.
(A) cubic
(B) tetragonal
(C) octagonal
(D) hexagonal
Option d – hexagonal
Only one element of ……… forms metallic hydride.
(A) group 6
(B) group 7
(C) group 8
(D) group 9
Option a – group 6
When HOCI is treated with hydrogen peroxide in an acidic medium, the oxidation number of Cl changes from ………
(A) -2 to +1
(B) +1 to -1
(C) -1 to +1
(D) +1 to 0
Option b – +1 to -1
‘X’ is used as rocket fuel in space research. ‘X’ is also used in metallurgy to reduce heavy metal oxides. Identify ‘X’.
(A) Hydrogen peroxide
(B) Heavy water
(C) Water
(D) Dihydrogen
Option d – Dihydrogen
H₂O₂ on reaction with ethylene gives ……..
(A) ethane
(B) ethanal
(C) ethylene glycol
(D) ethyl alcohol
Option c – ethylene glycol
A sample of hydrogen peroxide solution was labeled as 10 volumes. This means ……….
(A) 1000 mL of this solution will give 1 L of oxygen at STP
(B) 10 L of this solution will give 1 L of oxygen at STP
(C) 0.1 L of this solution will give 1 L of oxygen at STP
(D) 10 L of this solution will give 10 L of oxygen at STP
Option c – 0.1 L of this solution will give 1 L of oxygen at STP
In which of the following pairs, both hydrides are NOT of the same type?
(A) HF, PH3
(B) NH3, H₂S
(C) NaH, CaH₂
(D) BaH₂, SiH4
Option d – BaH₂, SiH4
Clark’s process makes water softer by using ………
(A) potash alum
(B) sodium hexametaphosphate
(C) sodium bicarbonate
(D) calcium hydroxide
Option d – calcium hydroxide
2-Ethylanthraquinol undergoes ……… to give hydrogen peroxide.
(A) auto-reduction
(B) hydrolysis
(C) auto-oxidation
(D) electrolysis
Option c – auto-oxidation
Water reacts with a large number of substances. Reaction (I) : Na(s) + H₂O(l) Reaction (II) : P4010(s) + H₂O(l) Select the CORRECT option.
(A) Reaction (I) is a redox reaction and reaction (II) is a hydrolysis reaction.
(B) Reaction (II) is a redox reaction and reaction (I) is a hydrolysis reaction.
(C) Reactions (I) and (II) are hydrolysis reactions.
(D) Reactions (I) and (II) are redox reactions.
Option a – Reaction (I) is a redox reaction and reaction (II) is a hydrolysis reaction.
In which of the following compounds does hydrogen have an oxidation state of -1?
(A) CH4 and NH3
(B) NH3 and HF
(C) HCI and H₂O
(D) CaH₂ and KH
Option d – CaH₂ and KH
The volume strength of 3.0 N H₂O₂ solution is ……….
(A) 1.8
(B) 5.6
(C) 16.8
(D) 33.6
Option c – 16.8
Identify metallic hydride(s) from the following given hydrides. i. RbH ii. CrH iii. CaH₂ iv. BeH₂ V. PdH(0.6-0.8)
(A) Only i, iii and iv
(B) Only iv and v
(C) Only ii and v
(D) Only ii
Option c – Only ii and v
Which of the following statements is INCORRECT about hydrogen peroxide?
(A) It acts as both oxidizing as well as a reducing agent.
(B) Two -OH bonds of H₂O₂ lie in the same plane.
(C) It is miscible in water and forms a hydrate H₂O₂.H₂O.
(D) It is used as a bleaching agent.
Option b – Two -OH bonds of H₂O₂ lie in the same plane.
Which of the following statements is INCORRECT? ( MCQ on Hydrogen Class 11 )
(A) Saline hydrides react violently with water to form hydrogen gas.
(B) Saline hydrides are crystalline and non-conducting in the solid state.
(C) The melts of saline hydride are non-conducting.
(D) Electrolysis of the melt of saline hydride yields H₂ gas at the anode.
Option c – The melts of saline hydride are non-conducting.
Assertion: Dihydrogen is very reactive at room temperature. Reason: The H-H bond dissociation enthalpy is very high.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, Reason is true.
Option d – The assertion is false, Reason is true.
The volume of oxygen liberated from 6.8 g of H₂O₂ is …….. ( MCQ on Hydrogen Class 11 )
(A) 1120 mL
(B) 2240 mL
(C) 560 mL
(D) 224 mL
Option b – 2240 mL
Select an INCORRECT statement from the following. ( MCQ on Hydrogen Class 11 )
(A) The ion-exchange method is used for the removal of the permanent hardness of the water.
(B) Zeolites soften water by removing Na ions from water.
(C) Cation exchangers have groups like -SO3H attached to an organic molecule.
(D) Zeolites can be regenerated using an aqueous NaCl solution.
Option b – Zeolites soften water by removing Na ions from water.
We covered all the MCQ on hydrogen class 11 above in this post for free so that you can practice well for the exam.
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