Class 11 Chemistry Chapter 9 Hydrogen MCQ Questions with Answer

Hydrogen Class 11 MCQ is one of the best strategies to prepare for the CBSE Class 11 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more MCQs on Hydrogen Class 11, which will help them all through their board tests.

Hydrogen Class 11 MCQ Question and Answers

Class 11 Chemistry MCQ with answers are given here to Chapter 9 Hydrogen. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 11 Chemistry syllabus. By Solving these Class 11 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 11 Annual exam.

Learn Class 11 Hydrogen MCQs with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 11 Chemistry Hydrogen MCQ with answers given below

Question 1. Hydrogen accepts an electron to form inert gas configuration. In this it resembles                     
(a) halogen
(b) alkali metals
(c) chalcogens
(d) alkaline earth metals

Question 2. Which of the following statements is correct ?                                   
(a) Hydrogen has same IP as alkali metals
(b) Hydrogen has same electronegativity as halogens
(c) It has oxidation number of –1 and +1
(d) It will not be liberated at anode

Question 3. Hydrogen can behave as a metal                         
(a) at very high temperature
(b) at very low temperature
(c) at very high pressure
(d) at very low pressure

Question 4. The property of hydrogen which distinguishes it from alkali metals is                             
(a) its electropositive character
(b) its affinity for non metal
(c) its reducing character
(d) its non-metallic character

Question 5. Following are some properties of hydrogen which of the following properties resemble with alkali metals and which with halogens                             
(i) Hydrogen lose one electron to form unipositive ions
(ii) Hydrogen gain one electron to form uninegative ions
(iii) Hydrogen forms oxides, halides and sulphides
(iv) Hydrogen has a very high ionization enthalpy
(v) Hydrogen forms a diatomic molecule, combines with elements to form hydrides and covalent compounds.
(a) Alkali metals resemble (i), (iii) and (iv) Halogens resemble (ii) and (v)
(b) Alkali metals resemble (i) and (iii) Halogens resemble (ii), (iii) and (v)
(c) Alkali metals resemble (i) and (iii) Halogens resemble (ii), (iv) and (v)
(d) Alkali metals resemble (i) only Halogens resemble (iv) and (v)

Question 6. Hydrogen molecules differs from chlorine molecule in the following respect                           
(a) Hydrogen molecule is non-polar but chlorine molecule is polar
(b) Hydrogen molecule is polar while chlorine molecule is non-polar
(c) Hydrogen molecule can form intermolecular hydrogen bonds but chlorine molecule does not
(d) Hydrogen molecule cannot participate in coordination bond formation but chlorine molecule can

Question 7. Why does H⁺ ion always get associated with other atoms or molecules?                               
(a) Ionisation enthalpy of hydrogen resembles that of alkali metals.
(b) Its reactivity is similar to halogens.
(c) It resembles both alkali metals and halogens.
(d) Loss of an electron from hydrogen atom results in a nucleus of very small size as compared to other atoms or ions. Due to small size it cannot exist free.

Question 8. Which one of the following is not an isotope of hydrogen ?                               
(a) Deuterium
(b) Tritium
(c) Ortho hydrogen
(d) None of these

Question 9. Which of the following metal evolves hydrogen on reacting with cold dilute HNO₃ ?                               
(a) Mg
(b) Al
(c) Fe
(d) Cu

Question 10. Hydrogen bond energy is equal to :                                 
(a) 3-7 cals
(b) 30-70 cals
(c) 3-10 kcals
(d) 30-70 kcals 

Question 11. Which of the following is formed when zinc reacts with sodium hydroxide?                           
(a) Hydrogen gas
(b) Sodium zincate
(c) Zinc oxide
(d) Both (a) and (b)

Question 12. Number of neutrons in three isotopes of hydrogen, protium, deuterium and tritium respectively is             
(a) 0, 1, 2
(b) 1, 1,1
(c) 2, 1, 0
(d) 2, 0, 1

Question 13. Which isotope(s) of hydrogen is/are radioactive and emits low energy β– particles?                                   
(i) Protium (ii) Tritium
(iii) Deuterium
(a) (i) and (ii)
(b) (iii) only
(c) (ii) only
(d) (ii) and (iii)

Question 14. Hydrogen is evolved by the action of cold dil. HNO₃ on                             
(a) Fe
(b) Mn
(c) Cu
(d) Al

Question 15. In Bosch’s process which gas is utilised for the production of hydrogen gas ?                           
(a) Producer gas
(b) Water gas
(c) Coal gas
(d) None of these

Question 16. Hydrogen is not obtained when zinc reacts with                             
(a) Cold water
(b) dil. HCl
(c) dil. H₂SO₄
(d) Hot NaOH (20%)

Question 17. Which one of the following pairs of substances will not produce hydrogen when reacted together?           
(a) Copper and conc. nitric acid
(b) Ethanol and metallic sodium
(c) Magnesium and steam
(d) Phenol and metallic sodium

Question 18. Why is water gas (mixture of CO and H₂) also called ‘syn gas’?                               
(a) Because it is synthesised from sewage, saw – dust, scrap wood etc.
(b) Because it is synthesised from methane gas
(c) Because it is used in the synthesis of methanol and a number of hydrocarbons.
(d) None of these

Question 19. Which one of the following pairs of substances on reaction will not evolve H2 gas?                                   
(a) Iron and H₂SO₄ (aqueous)
(b) Iron and steam
(c) Copper and HCl (aqueous)
(d) Sodium and ethyl alcohol

Question 20. Which of the following is not a use of dihydrogen ?                           
(a) It used in fuel cells for generating electrical energy.
(b) Atomic hydrogen and oxy-hydrogen torches are used for cutting and welding purposes.
(c) It used in the synthesis of hydroquinone and tartaric acid.
(d) Both (b) and (c)

Question 21. Elements of which of the following group do not form hydrides?                                 
(a) Alkali metals
(b) Halogens
(c) Alkaline earth metals
(d) Noble gases

Question 22. Very pure hydrogen (99.9) can be made by which of the following processes ?                       
(a) Reaction of methane with steam
(b) Mixing natural hydrocarbons of high molecular weight
(c) Electrolysis of water
(d) Reaction of salts like hydrides with water

Question 23. Which of the following is formed on reaction of carbon monoxide gas with dihydrogen in presence of cobalt as a catalyst?                           
(a) Methanal
(b) Methanol
(c) Methane
(d) Formic acid

Question 24. Which hydride is an ionic hydride ?                                 
(a) H₂S
(b) TiH1.73
(c) NH₃
(d) NaH

Question 25. Metal hydride on treatment with water gives                               
(a) H₂O₂
(b) H₂O
(c) Acid
(d) Hydrogen

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Question 26. Choose the correct option for following hydrides. B2H6, CH4, NH3 and HF                                   
(a) Electron deficient hydride = B₂H₆ and HF Electron precise hydride = CH4 Electron rich hydride = NH₃
(b) Electron deficient hydride = B₂H₆ Electron precise hydride = CH₄ Electron rich hydride = NH₃ and HF
(c) Electron deficient hydride = CH₄ Electron precise hydride = B₂H₆ Electron rich hydride = NH₃ and HF
(d) Electron deficient hydride = CH₄ and HF Electron precise = B₂H₆ Electron rich hydride = NH₃,

Question 27. Elements of which of the following group(s) of periodic table do not form hydrides.                               
(a) Groups 7, 8, 9
(b) Group 13
(c) Groups 15, 16, 17
(d) Group 14

Question 28. Saline hydrides react explosively with water, such fires can be extinguished by                       
(a) water
(b) carbon dioxide
(c) sand
(d) None of these

Question 29. Ionic hydrides reacts with water to give                                 
(a) acidic solutions
(b) hydride ions
(c) basic solutions
(d) electorns

Question 30. The polymeric hydride is                                 
(a) CaH₂
(b) NaH
(c) BaH₂
(d) MgH₂

Question 31. Which of the following statements is incorrect?                                   
(a) Ionic hydrides are stoichiometric compounds of dihydrogen formed with most of s-block elements
(b) Ionic hydrides are crystalline, non-volatile and nonconducting in solid state.
(c) Melts of ionic hydrides conduct electricity and liberate dihydrogen gas at cathode.
(d) Both (a) and (c)

Question 32. LiAlH4 is used as :                                 
(a) An oxidizing agent
(b) A reducing agent
(c) A mordant
(d) A water softener

Question 33. Water is :                                     
(a) more polar than H₂S
(b) more or less identical in polarity with H₂S
(c) less polar than H₂S
(d) None of these

Question 34. Which of the following in incorrect statement?                             
(a) s-block elements, except Be and Mg, form ionic hydride
(b) BeH4, MgH₂, CuH₂, ZnH₂, CaH₂ and HgH₂ are intermediate hydride
(c) p-block elements form covalent hydride
(d) d-and f-block elements form ionic hydride

Question 35. Metal hydrides are ionic, covalent or molecular in nature. Among LiH, NaH, KH, RbH, CsH, the correct order of increasing ionic character is                         
(a) LiH > NaH > CsH > KH > RbH
(b) LiH < NaH < KH < RbH < CsH
(c) RbH > CsH > NaH > KH > LiH
(d) NaH > CsH > RbH > LiH > KH

Question 36. Water possesses a high dielectric constant, therefore :                   
(a) it always contains ions
(b) it is a universal solvent
(c) can dissolve covalent compounds
(d) can conduct electricity

Question 37. The low density of ice compared to water is due to                           
(a) hydrogen-bonding interactions
(b) dipole-dipole interactions
(c) dipole-induced dipole interactions
(d) induced dipole-induced dipole interactions

Question 38. When two ice cubes are pressed over each other, they uniteto form one cube. Which of the following forces is  responsible to hold them together ?                 
(a) Hydrogen bond formation
(b) Van der Waals forces
(c) Covalent attraction
(d) Ionic interaction

Question 39. At its melting point ice is lighter than water because                             
(a) H₂O molecules are more closely packed in solid state
(b) ice crystals have hollow hexagonal arrangement of H2O molecules.
(c) on melting of ice the H₂O molecule shrinks in size
(d) ice froms mostly heavy water on first melting.

Question 40. The boiling point of water is exceptionally high because                       
(a) there is covalent bond between H and O
(b) water molecule is linear
(c) water molecules associate due to hydrogen bonding
(d) water molecule is not linear

Question 41. The unusual properties of water in the condensed phase (liquid and solid states) are due to the                 
(a) presence of hydrogen and covalent bonding between the water molecules
(b) presence of covalent bonding between the water molecules
(c) presence of extensive hydrogen bonding between water molecules
(d) presence of ionic bonding

Question 42. Which of the following statements do not define the characteristic property of water “Water is a universal solvent”                       
(a) It can dissolve maximum number of compounds
(b) It has very low dielectric constant
(c) It has high liquid range
(d) None of these

Question 43. Which of the following metals reacts with H2O at room temp?                       
(a) Ag
(b) Fe
(c) Al
(d) Na

Question 44. The H–O–H angle in water molecule is about                             
(a) 90º
(b) 180º
(c) 102.5°
(d) 104.5º

Question 45. Which one the following removes temporary hardness of water ?                                 
(a) Slaked lime
(b) Plaster of Paris
(c) Epsom
(d) Hydrolith

Question 46. Which of the following groups of ions makes the water hard?                         
(a) Sodium and bicarbonate
(b) Magnesium and chloride
(c) Potassium and sulphate
(d) Ammonium and chloride.

Question 47. When zeolite (hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with                         
(a) H⁺ ions
(b) Ca²⁺ ions
(c) SO₄²⁻ ions
(d) OH^– ions

Question 48. The process used for the removal of hardness of water is                         
(a) Calgon
(b) Baeyer
(c) Serpeck
(d) Hoope

Question 49. Permanent hardness of water is due to the presence of                         
(a) bicarbonates of sodium and potassium
(b) chlorides and sulphates of sodium and potassium
(c) chlorides and sulphates of calcium and magnesium
(d) bicarbonates of calcium and magnesium

Question 50. Permanent hardness of water can be removed by adding Calgon (NaPO3)n. This is an example of             
(a) Adsorption
(b) Exchange of ion
(c) Precipitation
(d) None

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