MCQs For NCERT Class 11 Chemistry Chapter 9 Hydrogen

Please refer to the MCQ Questions for Class 11 Chemistry Chapter 9 Hydrogen with Answers. The following Hydrogen Class 11 Chemistry MCQ Questions have been designed based on the latest syllabus and examination pattern for Class 11. Our experts have designed MCQ Questions for Class 11 Chemistry with Answers for all chapters in your NCERT Class 11 Chemistry book.

Hydrogen Class 11 MCQ Questions with Answers

See below Hydrogen Class 11 Chemistry MCQ Questions, solve the questions and compare your answers with the solutions provided below. 

Question. One would expect proton to have very large
(a) charge
(b) ionization potential
(c) hydration energy
(d) radius. 

Question. Water gas is produced by
(a) passing steam through a red hot coke
(b) saturating hydrogen with moisture
(c) mixing oxygen and hydrogen in the ratio of 1 : 2
(d) heating a mixture of CO₂ and CH₄ in petroleum refineries. 

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

Question. Which of the following statements about hydrogen is incorrect?
(a) Hydronium ion, H₃O⁺ exists freely in solution.
(b) Dihydrogen does not act as a reducing agent.
(c) Hydrogen has three isotopes of which tritium is the most common.
(d) Hydrogen never acts as cation in ionic salts.

Question. Which of the following is electron-deficient?
(a) (BH₃)₂
(b) PH₃
(c) (CH₃)₂
(d) (SiH₃)₂

Question. The method used to remove temporary hardness of water is
(a) synthetic resins method
(b) Calgon’s method
(c) Clark’s method
(d) ion-exchange method. 

Question. The ionization of hydrogen atom would give rise to
(a) hydride ion
(b) hydronium ion
(c) proton
(d) hydroxyl ion.

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

Question. The number of hydrogen bonded water molecule(s) associated with CuSO₄. 5H₂O is B
(a) 3
(b) 1
(c) 2
(d) 5

Question. The structure of H₂O₂ is
(a) spherical
(b) non-planar
(c) planar
(d) linear. 

Question. The volume strength of 1.5 N H₂O₂ solution is
(a) 8.8
(b) 8.4
(c) 4.8
(d) 5.2 

Question. The O – O – H bond angle in H₂O₂ is
(a) 106°
(b) 109°28′
(c) 120°
(d) 97° 

Question. 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. The reaction of H₂O₂ with H₂S is an example of ……… reaction.
(a) addition
(b) oxidation
(c) reduction
(d) acidic

Question. 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 molecules shrinks in size
(d) ice forms mostly heavy water on first melting.

Question. Hydrogen peroxide molecules are
(a) monoatomic and form X₂ ^2– ions
(b) diatomic and form X^– ions
(c) diatomic and form X^{2 –} ions
(d) monoatomic and form X^– ions.

Question. Some statements about heavy water are given below.
(i) Heavy water is used as a moderator in nuclear reactors.
(ii) Heavy water is more associated than ordinary water.
(iii) Heavy water is more effective solvent than ordinary water.
Which of the above statements are correct?
(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii) and (iii)
(d) (i) and (iii)

Question. The reaction of H₂S + H₂O₂ →S + 2H₂O manifests
(a) Acidic nature of H₂O₂
(b) Alkaline nature of H₂O₂
(c) Oxidising nature of H₂O₂
(d) Reducing action of H₂O₂

Question. Which of the following is not true?
(a) D₂O freezes at lower temperature than H₂O
(b) Reaction between H₂ and Cl₂ is much faster than D₂ and Cl₂
(c) Ordinary water gets electrolysed more rapidly than D₂O
(d) Bond dissociation energy of D₂ is greater than H₂

Question. Heavy water reacts respectively with CO₂, SO₃, P₂O₅ and N₂O₅ to give the compounds :
(a) D₂CO₃, D₂SO₄, D₃PO₂, DNO₂
(b) D₂CO₃, D₂SO₄, D₃PO₄, DNO₂
(c) D₂CO₃, D₂SO₃, D₃PO₄, DNO₂
(d) D₂CO₃, D₂SO₄, D₃PO₄, DNO₃

Question. Which of the following terms is not correct for hydrogen ?
(a) Its molecule is diatomic
(b) It exists both as H⁺ and H^– in different chemical compounds
(c) It is the only species which has no neutrons in the nucleus
(d) Heavy water is unstable because hydrogen is substituted by its isotope deuterium

Question. The sum of the number of neutrons and protons in all the three isotopes of hydrogen is
(a) 6
(b) 5
(c) 4
(d) 3

Question. The hydride ion, H–, is a stronger base than the hydroxide ion, OH–. Which one of the following reactions will occur if sodium hydride (NaH) is dissolved in water?
(a) H⁻ (aq) H₂O(l) →H₃O⁻ (aq)
(b) H⁻(aq) +H₂O(l)→OH⁻(aq) +H₂(g)
(c) H⁻ (aq) + H₂O(l) →OH− (aq) + 2H⁺ (aq) + 2e
(d) H⁻ (aq) + H₂O(l) → No reaction

Question. Hydrogen will not reduce
(a) heated cupric oxide
(d) heated ferric oxide
(c) heated stannic oxide
(d) heated aluminium oxide

Question. Some statements about heavy water are given below:
(i) Heavy water is used as a moderator in nuclear reactors.
(ii) Heavy water is more associated than ordinary water.
(iii) Heavy water is more effective solvent than ordinary water.
Which of the above statements are correct?
(a) (i) and (iii)
(b) (i) and (ii)
(c) (i), (ii) and (iii)
(d) (ii) and (iii)

Question. Which of the following statements are correct ?
(i) Hydrogen peroxide is industrially prepared by the auto-oxidation of 2-alkylanthraquinols
(ii) One millilitre of 30% H₂O₂ means that solution will give 100 V of oxygen at STP
(iii) Dihedral angle of H₂O₂ in gas phase is 90.2° and in solid phase dihedral angle is 111.5°
(a) (i), (ii) and (iii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (ii)

Question. Choose the correct sequence of T and F for following statements. Here T stands for true and F stands for false statement.
(i) At atmospheric pressure ice crystallises in the hexagonal form, but at very low temperatures it condenses to cubic form.
(ii) Density of ice is less than that of water. Therefore, an ice cube floats on water.
(iii) In winter season ice formed on the surface of a lake makes survival of the aquatic life difficult.
(iv) Hydrogen bonding gives ice a open type structure with wide holes.
(a) TTFT
(b) FTFT
(c) FTTT
(d) TFTT

Question. Which of the following sequence of T and F is correct for given statements? Here T stands for true and F stands for false statement
(i) The H–H bond dissociation enthalpy is highest for a single bond between two atoms of any element
(ii) H2 is relatively inert at room temperature.
(iii) Hydrogen combines with almost all the elements due to its incomplete orbital
(iv) The atomic hydrogen is produced at high temperature in an electric arc or under UV radiations.
(a) TTTT
(b) FTFT
(c) FTTT
(d) FTTF

Question. Which of the following statement(s) is/are incorrect?
(i) Dihydrogen reduces copper
(II) oxide to copper
(ii) Reaction of dihydrogen with sodium gives sodium hydride.
(iii) Hydroformylation of olefins yields aldehydes which further undergo reduction to give alcohols.
(iv) Hydrogenation of vegetable oils using iron as catalyst gives edible fats.
(a) (i), (ii) and (iii)
(b) (i) and (iv)
(c) (iv) only
(d) (iii) and (iv)

Question. Match the columns
Column-I Column-II
(A) Ionic hydrides (p) NiH0.6-0.7
(B) Molecular hydrides (q) LiH
(C) Metallic hydrides (r) HF
(a) A – (q), B – (r), C – (p)
(b) A – (r), B – (q), C – (p)
(c) A – (q), B – (p), C – (r)
(d) A – (r), B – (p), C – (q)

Question. The storage tanks used for H₂ are made up of which metal alloy(s)
(i) NaNi5 (ii) B₂H₆
(iii) Ti–TiH2 (iv) Mg–MgH₂
(a) (iii) and (iv)
(b) (i) and (ii)
(c) (i), (iii) and (iv)
(d) (ii), (iii) and (iv)

Question. The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively :
(a) 8, 10, 11
(b) 10, 10, 10
(c) 10, 11, 10
(d) 11, 10, 10

Question. Choose the incorrect statement
(a) Dihydrogen can release more energy than petrol.
(b) The only pollutant in combustion of dihydrogen is carbon dioxide.
(c) Hydrogen economy is based on the principle of transportation and storage of energy in the form of liquid or gaseous dihydrogen
(d) Hydrogen economy has advantage that energy is transmitted in the form of dihydrogen and not as electric power.

Question. Which of the following fuel is used for runnning the automobiles first time in the history of India during October 2005?
(a) D₂O
(b) H₂O₂
(c) D₂
(d) H₂

Question. What is formed when calcium carbide reacts with heavy water?
(a) C₂D₂
(b) CaD2
(c) Ca₂D₂O
(d) CD₂

Question. D₂O is used in
(a) motor vehicles
(b) nuclear reactor
(c) medicine
(d) insecticide

Question. Complete the following reaction. Al₄C₃ + D₂O → x + y
(a) x = C₂D₂ and y = Al(OD)₃
(b) x = CD₄ and y = Al(OD)₃
(c) x = CO₂ and y = Al₂D₃
(d) x = CD₄ and y = Al₂D₃

Question. Which of the following is correct about heavy water ?
(a) Water at 4°C having maximum density is known as heavy water
(b) It is heavier than water (H₂O)
(c) It is formed by the combination of heavier isotope of hydrogen with oxygen
(d) None of these

Question. D₂O is preferred to H₂O, as a moderator, in nuclear reactors because
(a) D₂O slows down fast neutrons better
(b) D₂O has high specific heat
(c) D₂O is cheaper
(d) None of these

Question. The decomposition of H₂O₂ is accelerated by –
(a) glycerine
(b) alcohol
(c) phosphoric acid
(d) Pt powder

Question. H₂O₂ is always stored in black bottles because
(a) It is highly unstable
(b) Its enthalpy of decomposition is high
(c) It undergo auto-oxidation on prolonged standing
(d) None of these

Question. H₂O₂ is
(a) Poor polar solvent than water
(b) Better polar solvent than H₂O
(c) Both have equal polarity
(d) Better polar solvent but its strong auto-oxidising ability limits its use as such

Question. Which of the following is wrong about H₂O₂? It is used
(a) As aerating agent in production of spong rubber
(b) As an antichlor
(c) For restoring white colour of blackened lead painting
(d) None of these

Question.. Heavy water is represented as
(a) H₂ 18O
(b) D₂O
(c) D₂ 18O
(d) H₂O at 4°C

Question. Which of the following equations depict the oxidising nature of H₂O₂?
(a) 2MnO₄⁻ + 6H⁺ + 5H₂O₂ → 2Mn²⁺ + 8H₂O + 5O₂
(b) 2Fe³⁺ + 2H⁺+ H₂O₂→2Fe²⁺ + 2H₂O + O₂
(c) 2I^– + 2H⁺ + H₂O₂→ I₂ + 2H₂O
(d) KIO₄ + H₂O₂ → KIO₃ + H₂O + O₂

Question. Which one of the following undergoes reduction with hydrogen peroxide in an alkaline medium ?
(a) Mn²⁺
(b) HOCl
(c) PbS
(d) I₂

Question. Which of the following does not represent reducing action of H2O2?
(a) PbS(s) + 4H₂O₂(aq) → PbSO₄(s) + 4H₂O_(l)
(b) HOCl + H₂O₂ → H3O + + Cl¯ + O₂
(c) 2MnO₄ – + 3H₂O₂ → 2MnO2 + 3O₂ +2H₂O+2OH¯
(d) I2 + H₂O₂ + 2OH¯ → 2I¯ + 2H₂O + O₂

Question. Which of the following is not true for hydrogen peroxide?
(a) H₂O₂ decomposes slowly on exposure to light.
(b) It is kept away from dust because dust can induce explosive decomposition of the compound.
(c) H₂O₂ is used as bleaching agent for textiles, paper pulp etc.
(d) It is used as a moderator in nuclear reactor. 

Question. H₂O₂→ 2H+ + O₂ + 2e– ; E° = –0.68 V. This equation represents which of the following behaviour of H₂O₂.
(a) Reducing
(b) Oxidising
(c) Acidic
(d) Catalytic

Question. The reaction H₂S + H₂O₂ →S + 2H₂O manifests
(a) Acidic nature of H₂O₂
(b) Alkaline nature of H₂O₂
(c) Oxidising action of H₂O₂
(d) Reducing action of H₂O₂.