JEE Chemistry Hydrogen MCQs Set B

Refer to JEE Chemistry Hydrogen MCQs Set B provided below available for download in Pdf. The MCQ Questions for Full Syllabus Chemistry with answers are aligned as per the latest syllabus and exam pattern suggested by JEE (Main), NCERT and KVS. Multiple Choice Questions for Hydrogen are an important part of exams for Full Syllabus Chemistry and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for JEE (Main) Full Syllabus Chemistry and also download more latest study material for all subjects

MCQ for Full Syllabus Chemistry Hydrogen

Full Syllabus Chemistry students should refer to the following multiple-choice questions with answers for Hydrogen in Full Syllabus.

Hydrogen MCQ Questions Full Syllabus Chemistry with Answers

 

 

Question: The oxide that gives H2O2 on treatment with dilute H2SO4 is–

  • a) BaO2
  • b) TiO2
  • c) PbO2
  • d) MnO2

Answer: BaO2

 

Question: 30 volume hydrogen peroxide means

  • a) 1 cm3 of solution liberates 30 cm3 of O2 at STP
  • b) 30 cm3 of solution contains 1 mole of H2O2
  • c) 30 cm3 solution contains 1g of H2O2
  • d) None of these

Answer: 1 cm3 of solution liberates 30 cm3 of O2 at STP

 

Question: The volume strength of 1.5 N H2O2 solution is

  • a) 8.4
  • b) 4.8
  • c) 8.0
  • d) 3.0

Answer: 8.4

 

Question: Commercial 10 volume H2O2 is a solution with a strength of approximately

  • a) 3%
  • b) 10%
  • c) 15%
  • d) 1%

Answer: 3%

 

Question: The structure of H2O2 is

  • a) non planar
  • b) linear
  • c) planar
  • d) spherical

Answer: non planar

 

Question: The O – O – H bond angle in H2O2 is

  • a) 94.8°
  • b) None of these
  • c) 106°
  • d) 120°

Answer: 94.8°

 

Question:  Which of the following is the true structure of H2O2 ?

  • a)

  • b)

  • c)

  • d)

Answer:

 

Question: In the hydrogen peroxide molecule

  • a) The four atoms are arranged in a non-linear and nonplanar manner
  • b) All the four atoms are in same plane
  • c) Two hydrogen atoms are connected to one of the oxygen
  • d) O – H bonds are polar but molecule is non-polar

Answer: The four atoms are arranged in a non-linear and nonplanar manner

 

Question: H2O2 is a

  • a) Weak acid
  • b) Weak base
  • c) None of these
  • d) Neutral

Answer: Weak acid

 

Question: When H2O2 is oxidised the product is

  • a) O2
  • b) HO2
  • c) OH
  • d) O2–

Answer: O2

 

Question: Which of the following is false about H2O2

  • a) Two OH bonds lies in the same plane
  • b) Pale blue liquid
  • c) Can be oxidised by ozone
  • d) Act as both oxidising and reducing agent

Answer: Two OH bonds lies in the same plane

 

Question: In which of the following reactions, H2O2 acts as a reducing agent

  • a)

  • b)

  • c) Both
  • d) None of these

Answer:

 

Question:

  • a) Reducing
  • b) Acidic
  • c) Oxidising
  • d) Catalytic

Answer: Reducing

 

Question:

  • a) Oxidising action of H2O2
  • b) Reducing action of H2O2
  • c) Alkaline nature of H2O2
  • d) Acidic nature of H2O2

Answer: Oxidising action of H2O2

 

Question:  Which of the following statements is incorrect ?

  • a) H2O2 has basic properties
  • b) H2O2 has acidic properties
  • c) None of these
  • d) H2O2 can act as a reducing agent

Answer: H2O2 has basic properties

 

Question:

  • a) an oxidising agent in (A) and reducing agent in (B)
  • b) an oxidising agent in both (A) and (B)
  • c) a reducing agent in (A) and oxidising agent in (B)
  • d) a reducing agent in both (A) and (B)

Answer: an oxidising agent in (A) and reducing agent in (B)

 

Question: Which of the following equations depict the oxidising nature of H2O2?

  • a) 

  • b)

  • c) Both
  • d) None of these

Answer:

 

Question: Which of the following does not represent reducing action of H2O2?

  • a)

  • b)

  • c) Both
  • d) None of these

Answer:

 

Question: Which of the following is not true for hydrogen peroxide?

  • a) It is used as a moderator in nuclear reactor.
  • b) H2O2 is used as bleaching agent for textiles, paper pulp etc.
  • c) It is kept away from dust because dust can induce explosive decomposition of the compound
  • d) None of these

Answer:  It is used as a moderator in nuclear reactor.

 

Question: The decomposition of H2O2 is accelerated by –

  • a) Pt powder
  • b) alcohol
  • c) glycerine
  • d) phosphoric acid

Answer: Pt powder

 

More Questions.........................................

 

Question: H2O2 is always stored in black bottles because

  • a) It undergo auto-oxidation on prolonged standing
  • b) None of these
  • c) Its enthalpy of decomposition is high
  • d) It is highly unstable

Answer: It undergo auto-oxidation on prolonged standing

 

Question: H2O2 is

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

Answer: 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) None of these
  • b) For restoring white colour of blackened lead painting
  • c) As an antichlor
  • d) As aerating agent in production of spong rubber

Answer: None of these

 

Question: Heavy water is represented as

  • a) D2O
  • b) H2O at 4°C
  • c) Both
  • d) None of these

Answer: D2O

 

Question: What is formed when calcium carbide reacts with heavy water?

  • a) C2D2
  • b) Ca2D2O
  • c) CaD2
  • d) CD2

Answer: C2D2

 

Question: D2O is used in

  • a) nuclear reactor
  • b) insecticide
  • c) motor vehicles
  • d) medicine

Answer:  nuclear reactor

 

Question:

  • a) x = CD4 and y = Al(OD)3
  • b) x = CO2 and y = Al2D3
  • c) x = C2D2 and y = Al(OD)3
  • d) None of these

Answer: x = CD4 and y = Al(OD)3

 

Question: Which of the following is correct about heavy water ?

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

Answer: It is formed by the combination of heavier isotope of hydrogen with oxygen

 

Question: D2O is preferred to H2O, as a moderator, in nuclear reactors because

  • a) None of these
  • b) D2O is cheaper
  • c) D2O has high specific heat
  • d) D2O slows down fast neutrons better

Answer: None of these

 

Question: The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively

  • a) 10, 10, 10
  • b) 11, 10, 10
  • c) 8, 10, 11
  • d) 10, 11, 10

Answer: 10, 10, 10

 

Question: Choose the incorrect statement

  • a) The only pollutant in combustion of dihydrogen is carbon dioxide.
  • b) Dihydrogen can release more energy than petrol
  • 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.

Answer: The only pollutant in combustion of dihydrogen is carbon dioxide.

 

Question: Which of the following fuel is used for runnning the automobiles first time in the history of India during October 2005?

  • a) H2
  • b) H2O2
  • c) D2O
  • d) None of these

Answer: H2

 

Question:

  • a) (i), (iii) and (iv)
  • b) (iii) and (iv)
  • c) (i) and (ii)
  • d) (ii), (iii) and (iv)

Answer: (i), (iii) and (iv)

 

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) FTTT
  • c) FTFT
  • d) FTTF

Answer: TTTT

 

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) (iv) only
  • b) (i), (ii) and (iii)
  • c) (i) and (iv)
  • d) (iii) and (iv)

Answer: (iv) only

 

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) FTTT
  • c) FTFT
  • d) TFTT

Answer: TTFT

 

Question:

  • a) (i) and (ii)
  • b) (i) and (iii)
  • c) (i), (ii) and (iii)
  • d) (ii) and (iii)

Answer: (i) and (ii)

 

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) (ii) and (iii)
  • c) (i) and (iii)
  • d) (i), (ii) and (iii)

Answer: (i) and (ii)

 

Question:

  • 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)

Answer: A – (q), B – (r), C – (p)

 

Question:

  • a) A – (s), B – (q), C – (p), D – (r)
  • b) A – (r), B – (q), C – (s), D – (p)
  • c) A – (p), B – (q), C – (s), D – (r)
  • d) A – (s), B – (q), C – (r), D – (p)

Answer: A – (s), B – (q), C – (p), D – (r)

 

Question:

  • a) A – (p), B – (s), C – (r), D – (q)
  • b) A – (r), B – (q), C – (p), D – (s)
  • c) A – (q), B – (p), C – (r), D – (s)
  • d) A – (s), B – (q), C – (r), D – (p)

Answer: A – (p), B – (s), C – (r), D – (q)

 

Question:

  • a) A – (s), B – (r), C – (p)
  • b) A – (r), B – (q), C – (p)
  • c) A – (q), B – (r), C – (s)
  • d) A – (r), B – (s), C – (q)

Answer: A – (s), B – (r), C – (p)

 

Question:

  • a) A – (r), B – (p), C – (q), D – (s)
  • b) A – (q), B – (s), C – (r), D – (p)
  • c) A – (q), B – (r), C – (s), D – (s)
  • d) A – (r), B – (s), C – (q), D – (p)

Answer: A – (r), B – (p), C – (q), D – (s)

 

Question:

  • a) (A) – (r), (B) – (p), (C) – (q), (D) – (s)
  • b) (A) – (r), (B) – (q), (C) – (s), (D) – (p)
  • c) (A) – (r), (B) – (q), (C) – (p), (D) – (s)
  • d) (A) – (p), (B) – (q), (C) – (r), (D) – (s)

Answer: (A) – (r), (B) – (p), (C) – (q), (D) – (s)

 

Question:

Assertion : H+ does not exist freely and is always associated with other atoms or molecules.
Reason : Loss of the electron from hydrogen atom results in nucleus (H+) of ~ 1.5 × 10–3 pm size. This is extremely small as compared to normal atomic and ionic sizes of 50 to 200 pm.

  • a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
  • b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
  • c) Assertion is correct, reason is incorrect
  • d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

 

Question:

Assertion : Hydrogen combines with other elements by losing, gaining or sharing of electrons.
Reason : Hydrogen forms electrovalent and covalent bonds with other elements.

  • a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
  • b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
  • c) Assertion is correct, reason is incorrect
  • d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

 

Question:

Assertion : H2O2 is not stored in glass bottles.
Reason : Alkali oxides present in glass catalyse the decomposition of H2O2.

  • a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
  • b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
  • c) Assertion is correct, reason is incorrect
  • d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

 

Question:

Assertion : Decomposition of H2O2 is a disproportionation reaction.
Reason : H2O2 molecule simultaneously undergoes oxidation and reduction.

  • a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
  • b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
  • c) Assertion is correct, reason is incorrect
  • d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

 

Question:

Assertion : Hard water is not suitable for laundary.
Reason : Soap containing sodium stearate reacts with hard water to precipitate out as calcium or magnesium stearate.

  • a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
  • b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
  • c) Assertion is correct, reason is incorrect
  • d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

 

Question:

Assertion : Calgon is used for removing permanent hardness of water.
Reason : Calgon forms precipitates with Ca2+ and Mg2+.

  • a) Assertion is correct, reason is incorrect
  • b) Assertion is correct, reason is correct; reason is a correct explanation for assertion
  • c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
  • d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is incorrect

 

Question:

Assertion : Temporary hardness can be removed by boiling.
Reason : On boiling the soluble bicarbonates change to carbonates which being insoluble, get precipitated

  • a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
  • b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
  • c) Assertion is correct, reason is incorrect

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

 

Question: Hydrogen will not reduce

  • a) heated aluminium oxide
  • b) heated ferric oxide
  • c) heated cupric oxide
  • d) heated stannic oxide

Answer: heated aluminium oxide

 

Question: Which of the following terms is not correct for hydrogen ?

  • a) Heavy water is unstable because hydrogen is substituted by its isotope deuterium
  • b) It is the only species which has no neutrons in the nucleus
  • c) Its molecule is diatomic
  • d) None of these

Answer: 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) 4
  • c) 5
  • d) 3

Answer: 6

 

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)

  • b)

  • c)

  • d) None of these

Answer:

 

Question:

  • a) Oxidising nature of H2O2
  • b) Reducing action of H2O2
  • c) Alkaline nature of H2O2
  • d) None of these

Answer: Oxidising nature 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

Answer: D2O freezes at lower temperature than H2O

 

Question: Heavy water reacts respectively with CO2, SO3, P2O5 and N2O5 to give the compounds :

  • a)

  • b)

  • c)

  • d) None of these

Answer:

 

Question:

  • a)

  • b)

  • c)

  • d) None of these

Answer:

 

Question: The volume strength of 1.5 N H2O2 solution is

  • a) 8.4
  • b) 4.8
  • c) 8.0
  • d) 3.0

Answer: 8.4

 

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