MPBSE Class 11 Chemistry Hydrogen Multiple Choice Question and Answers

Class 11 Hydrogen Important Questions

MPBSE Class 11 Chemistry Hydrogen Multiple Choice Question and Answers

Question 1. At absolute zero

1. Only para-hydrogen exists
2. Onlypara- hydrogen exists
3. Both ortho- and para-hydrogen exist
4. Neither para- nor ortho-hydrogen exists

Answer: 1. Only para-hydrogen exists

Question 2. In which of the following reaction dihydrogen acts as an oxidising agent—

1. F₂ + H₂ → 2HF
2. Cl₂ + H₂  → 2HC1
3. N₂ + 3H_{2 →}2NH₃
4. 2Na + H₂ → 2NaH

Answer: 4. 2Na + H₂ → 2NaH

Question 3. Which of the following halogens has the least affinity towards hydrogen—

1. I₂
2. CI₂
3. Br₂
4. F₂

Answer: 1. I₂

Question 4. Which of the following compounds on electrolysis produces hydrogen—

1. dil. H₂S0₄
2. dil. solution of NaOH
3. Ba(OH)₂ solution
4. KOH solution

Answer: 3. Ba(OH)₂ solution

Hydrogen Mcq Class 11

MPBSE Class 11 Chemistry MCQs Question 5. The thermal stability of Gr.-15 hydrides follows the order

1. ASH₃ > PH₃ > NH₃ > SbH₃ > BiH₃
2. NH₃ > PH₃ > ASH₃ > SbH₃ > BiH₃
3. NH₃ > AsH₃ > PH₃ > SbH₃ > BiH₃
4. BiH₃ > SbH₃ > AsH₃ > PH₃ > NH₃

Answer: NH₃ > PH₃ > ASH₃ > SbH₃ > BiH₃

Question 6. The correct order of vaporization enthalpy of the following hydride is

1. NH₃<PH₃<AsH₃
2. AsH₃<PH₃<NH₃
3. PH₃<AsH₃<NH₃
4. NH₃<AsH₃<PH₃

Answer: 3. PH₃<AsH₃<NH₃

Question 7. Interstitial hydrides are formed by—

1. S-block elements
2. P-block elements
3. D-block elements
4. Intert gas elements

Answer: 3. D-block elements

Question 8. The correct descending order of thermal stability of alkali metals hydrides is—

1. LiH > NaH > KH > RbH > CsH
2. CsH > RbH > KH > NaH > LiH
3. NaH > KH > LiH > CsH > RbH
4. CsH > LiH > KH > NaH > RbH

Answer: 1. LiH > NaH > KH > RbH > CsH

Class 11 Chemistry Hydrogen Mcqs

MPBSE Class 11 Chemistry MCQs  Question 9. Solubility of NaClin the solvents H20 and DaO is

1. Equal in both
2. More in D₂0
3. More in H₂0
4. Only in H₂0

Answer: 3. More in H₂0

Question 10. The degree of hardness of 1L sample water containing 0.002 mol MgS0₄ is

1. 20 ppm
2. 200 ppm
3. 2000ppm
4. 120ppm

Answer: 2. 200 ppm

Question 11. Which of the following reacts with water to produce electron-precise hydrides—

1. Ca3P₂
2. AI₄C₃
3. Mg₃N₂
4. None of these

Answer: 2. Al₄C₃

Hydrogen Class 11 MCQ Question 12. Which of the following couples reacts with water to produce the same gaseous product—

1. K and K0₂
2. K and K0₂
3. Na and Na₂0₂
4. Ba and Ba0₂

Answer: 2. K and K0₂

Question 13. Which of the following compounds contain free hydrogen

1. Water
2. Marsh gas
3. Water gas
4. Acid

Answer: 3. Water gas

Question 14. Which of the following reacts with metallic sodium to produce hydrogen—

1. CH₄
2. C2H₆
3. C2H₄
4. C₂H₂

Answer: 4. C₂H₂

Question 15. Semi-water gas is

1. CO + H₂ + N₂
2. H₂ + CH₄
3. CO + H₂+ O₂
4. CO + H₂

Answer: 1. CO + H₂ + N₂

Hydrogen Class 11 Ncert Solutions

Question 16. Which of the following metals does not react with cold water liberates H₂  with boiling water

1. Na
2. K
3. Pt
4. Fe

Answer: 4. Fe

Question 17. Volume of ’10 volume’ H₂0₂ required to convert 0.01 mol PbS into PbS0₄ is—

1. 11.2 mL
2. 22.4 mL
3. 33.6 mL
4. 44.8 mL

Answer: 4. 44.8 mL

Hydrogen Class 11 MCQ Question 18. On dilution of H₂0₂, the value of dielectric constant

1. Increases
2. Remains same
3. Decreases
4. None of these

Answer: 1. Increases

Question 19. By which of the following water gets oxidized to oxygen

1. Cl0₂
2. KMn0₄
3. H₂0₂
4. F₂

Answer: 4. F2

Question 20. Which of the following does not get oxidized by H₂0₂

1. Na₂S0₃
2. PBS
3. KI
4. O₃

Answer: 4. O₃

Question 21. The temperature at which the density of D₂0 is maximum is

1. 9°C
2. 11.5°C
3. 15.9°C
4. 20°C

Answer: 11.5°C

Question 22. Which of the following undergoes disproportionation reaction with water—

1. S0₃
2. F₂
3. Cl₂
4. N₂

Answer: 2. F₂

Multiple Choice Questions On Hydrogen

Hydrogen Class 11 MCQ Question 23. Which of the following undergoes disproportionation reaction with water—

1. S0₃
2. F₂
3. Cl₂
4. N₂

Answer: 3. Cl₂

Question 24. The non-inflammable hydrides

1. NH₃
2. PH₃
3. ASH₃
4. SbH₃

Answer: 1. NH₃

Question 25. The triple point of water is

1. 203K
2. 193K
3. 273K
4. 373K

Answer: 3. 273K

Question 26. The process by which hydrogen is prepared by the reaction of silicon, iron alloy, and NaOH is

1. Woodprocess
2. Haber’s process
3. Silicol process
4. Bosch process

Answer: 3. Silicol process

Multiple Choice Questions On Hydrogen

Question 27. An element reacts with hydrogen to form a compound A, which in reaction with water liberates hydrogen again. The elements—

1. Cl
2. CS
3. Se
4. N₂

Answer: 2. CS

Question 28. Only one element of which of the following groups forms a metal hydride

1. Gr-6
2. Gr-7
3. Gr-8
4. Gr-9

Answer: 1. Gr-6

Question 29. An acidic solution of which of the following turns orange in the presence of H₂0₂ —

1. Ba0₂
2. Na₂0₂
3. Ti0₂
4. Pb0₂

Answer: 3. Ti0₂

Question 30. In the following reaction the isotopic oxygens \(2 \mathrm{MnO}_4^{-}+3 \mathrm{H}_2 \mathrm{O}_2^{18} \rightarrow 2 \mathrm{MnO}_2+3 \mathrm{O}_2+2 \mathrm{H}_2 \mathrm{O}+2 \mathrm{OH}^{-}\)

1. Both get converted into 0₂
2. Both get converted into oh
3. Both get converted into more
4. One of them gets converted to 0₂, another to mn0₂

Answer: Both get converted into 0₂

Question 31. X on electrolysis produces Y which on vacuum distillation produces H₂0₂. The numbers of peroxo linkage present X and Y are

1. 1,1
2. 1,2
3. 0>1
4. 0,0

Answer: 3. 0>1

Question 32. The compound which on electrolysis in its molten or liquid state liberates hydrogen at the anode is

1. NaOH
2. CaH₂
3. HC1
4. H₂0

Answer: 2. CaH₂

Question 33. Which of the following couples exhibit the maximum isotope effect

1. H D
2. O O
3. CI CI
4. C C

Answer: 1. H D

Class 11 Chemistry Hydrogen Mcqs

Question 34. Which of the following emits by tritium

1. Neutron
2. Ray
3. Particle
4. Particle

Answer: 3. Particle

MPBSE Class 11 Chemistry MCQs Question 35. Oxidation of benzene by H₂0₂ in the presence of ferrous sulfate produces

1. Pheno
2. Cyclohexane
3. Anisole
4. Benzaldehyde

Answer: 1. Pheno

Multiple Choice Questions On Hydrogen

Question 36. The oxidation state of Cr in the product obtained by the reduction of K₂Cr₂0? by atomic hydrogen is

1. +6
2. +2
3. 0
4. +3

Answer: 4. +3

Question 37. Which of the following does not get reduced by H₂ in its aqueous solution

1. Cu₂+
2. Fe₃+
3. Zn₂+
4. Ag+

Answer: 3. Zn₂+

Question 38. Which of the following compounds has a similar odor as that of H₂0₂

1. Caustic soda
2. Chloroform
3. Alcohol
4. Nitric acid

Answer: 4. Nitric acid

Question 39. Which of the following compounds reacts with atomic hydrogen to form formaldehyde

1. CO
2. C0₂
3. CH₄
4. C₂H₂

Answer: 1. CO

Class 11 Chemistry Hydrogen Mcqs

Question 40. Which of the following isotopes of hydrogen is the most reactive

1. H
2. H
3. H
4. All the isotopes are equally reactive

Answer: 1. H

MPBSE Class 11 Chemistry MCQs Question 41. When equal amounts of Zn are allowed to react separately with excess H₂S0₄ and excess NaOH, then the ratio of the volumes of hydrogen produced for the first and the second case respectively

1. 1:2
2. 2:1
3. 4:9
4. 1:1

Answer: 4. 1:1

Question 42. Which of the following hydrides of s-block elements have a polymeric structure

1. LiH
2. BeH₂
3. No
4. MgH₂

Answer: 2. BeH₂

Question 43. Which of the following statements is true—

1. Ifz= 15, the element forms a covalent hydride
2. Ifz= 23, the element forms an ionic hydride
3. Ifz= 19, the element forms an ionic hydride
4. Ifz= 44, the element forms metalic hydride

Answer: 1. Ifz= 15, the element forms a covalent hydride

Question 44. Which of the following hydrides are polynuclear hydrides

1. No
2. C₃H₈
3. N₂H₄
4. HF

Answer: C₃H₈

Question 45. Which of the following statements is correct

1. Metallic hydrides are hydrogen-deficient
2. Metallic hydrides are conductors of heat and electricity
3. Ionic hydrides in their solid state do not conduct electricity
4. Ionic hydrides on electrolysis in their molten state produce h2 at the cathode.

Answer: 1. Metalic hydrides are hydrogen deficient

Question 46. Which of the following ions get exchanged with Na⁺ ion of zeolite when zeolite is added to thehard water

1. H⁺ ion
2. Ca²⁺ ion
3. So⁺ ion
4. Mg²⁺ ion

Answer: 2. Ca²⁺ ion

MPBSE Class 11 Chemistry MCQs Question 47. Which of the following reactions are neurolysis

1. 2Na + 2D₂0 → 2NaOD + D₂
2. AlClg + 3D₂0 →Al(OD)₃ + 3DC1
3. Ca + 2D₂0→ Ca(OD)₂ + D₂
4. Fe₂(S₄)₃ + 6D₂0-> 2Fe(0D)3 + 3D₂S0₄

Answer: 2. AlClg + 3D₂0→ Al(OD)₃ + 3DC1

Multiple Choice Questions On Hydrogen

Question 48. Which of the following reactions are redox reactions

1. H₂O + so_{2 →} H2SO₃
2. CaO + H₂0 → Ca(OH)₂
3. 2Na + 2H₂0 → 2NaOH + H₂
4. 2F₂ + 2H₂0 → 0₂ + 4HF

Answer: 3. 2Na + 2H₂0 → 2NaOH + H₂

Question 49. In which of the following reactions H₂0₂ acts as a reductant—

1. CgHg + H₂0₂ → CgHgOH + H₂20
2. PbS + 4H₂0₂ → PbS0₄ + 4H₂0
3. Na0Br +H₂0₂ → NaBr + H₂0 + 0₂
4. 2Mn0₄ +6H+ + 5H₂0₂ → 2Mn₂+ + 8H₂0 + 50₂

Answer: 3. Na0Br +H₂0₂ → NaBr + H₂0 + 0₂

Question 50. Which of the properties are the same for a metal and its hydride

1. Hardness
2. Electrical conductance
3. Magnetic property
4. Metallic lustre

Answer: 1. Hardness

Question 51. The correct orders are—

1. H₂ < D₂ < T₂ : boilingpoint
2. H₂ < D₂ < T₂ : freezing point
3. H₂ < D₂ < T₂ : latent heat ofvaporisation
4. T₂O > H₂0 > D₂0 : dissociation constant

Answer: 1. H₂ < D₂ < T₂ : boilingpoint

Question 52. Which of the following reacts with zinc to produce hydrogen gas

1. dil.HCl
2. cold water
3. hot NaOH solution
4. cone. H₂S0₄

Answer: 2. cold water

Question 53. Which of the following properties has a greater magnitude in D₂0 than that in H₂0

1. Viscosity
2. Surface tension
3. dielectric constant
4. latent heat of vaporisation

Answer: 2. Viscosity

Question 54. Which of the following metal hydrides get reduced by hydrogen

1. CuO
2. Pb₃0₄
3. Na₂0₂
4. MgO

Answer: 1. CuO

Multiple Choice Questions On Hydrogen

Question 55. Multimolecular covalent hydrides of s-block are

1. LiH
2. BeH₂
3. NaH
4. MgH₂

Answer: 2. BeH₂

MPBSE Class 11 Chemistry MCQs Question 56. The oxidation numbers of the most electronegative element in the product were obtained due to the reaction between Ba0₂ and dil. H₂S0₄ are—

1. -1
2. 0
3. -2
4. +1

Answer: 1. -1

Question 57. Which of the following compounds decreases the rate of decomposition of H₂0₂ —

1. CO(NH₂)₂
2. Mn0₂
3. PbNHCOCH₃
4. (COOH)₂

Answer: 1. CO(NH₂)₂

Question 58. Which of the following produces H₂0₂ on hydrolysis

1. Pemitricacid
2. Perchloric acid
3. Perdisulphuric acid
4. Caro’s acid

Answer: 1. Pemitricacid

Question 59. Choose the correct statements

1. The concentration of 20 volume H₂0₂ solution is 60.7g L^-1
2. volume strength of 2(N)H₂0₂ solution is 15
3. volume strength of 2(N)H₂0₂ solutions 11.2
4. The concentration of the 20-volume H₂0₂ solution is 50.7g. L^-1

Answer: 1. The Concentration of 20-volume H₂0₂ solution is 60.7g L^-1

Question 60. Choose the correct alternative—

1. a mixture of HCl and HCIO is formed when chlorine reacts with cold water
2. arrange color of K₂Cr₂0₇ solution turns blue when it reacts with H₂0₂
3. under low pressure, isopropyl alcohol reacts with a small amount of H₂0₂ to produce formaldehyde
4. hydrolith produces black coloured product when it reacts with PbS0₄

Answer: 1. a mixture of HC1 and HCIO is formed when chlorine reacts with cold water

Question 60. Which of the following alternatives is not true—

1. The correct order of reactivity of h₂ towards the halogens
2. Is: cl₂ > br₂ > i₂ > f₂
3. The concentration of h₂0₂ used in rockets is 90%
4. H₂ gets more readily absorbed on the surface of metal than d₂
5. Conversion of atomic hydrogen into molecular hydrogens is an exothermic process

Answer: 1. Correct order of reactivity of h₂ towards the halogens