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NEET Hydrogen PYQs with Solutions

395 previous year questions from Hydrogen (NEET UG Chemistry) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

395 questionsChemistry2004–2026Answers + solutions

About Hydrogen PYQs

Hydrogen has 395 previous year questions in the Quantrex Academy NEET UG Chemistry bank. The 220 questions in this list come from NEET (206), JIPMER (11) and MHT CET Medical (3), spanning 2004 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

2026: 3
2019: 1
2016: 1
2015: 2
2013: 2
2012: 2
2011: 1
2006: 1
2004: 1

The melting point of solid substances is directly proportional to pressure acting on them. However, ice-melts at a temperature lower than its usual melting point, when the

JIPMER 2016 Solution View → 6

What is the primary reason for comparing the energy released by combustion of different fuels in terms of mole, mass, and volume?

NEET Solution View → 42

What is the term used for metals like Pd and Pt that can absorb a significant volume of hydrogen and can be used for hydrogen storage?

NEET Solution View → 59

How is the 1% hydrogen peroxide formed in the industrial process extracted and concentrated?

NEET Solution View → 60

What is the significance of using high current density during the electrolytic oxidation of sulphate solutions to obtain peroxodisulphate?

NEET Solution View → 61

In the manufacture of bulk organic chemicals, particularly methanol, what type of catalyst is used in the reaction of carbon monoxide (CO) with dihydrogen (H 2 )?

NEET Solution View → 67

What is the name of the mixture of CO and H 2 produced by the reaction of steam on hydrocarbons or coke at high temperatures?

NEET Solution View → 74

What is the product formed when hydrogen peroxide acts as a reducing agent in acidic medium with potassium permanganate (KMnO 4 )?

NEET Solution View → 89

What does "100 volume" hydrogen peroxide mean in terms of its oxygen production at STP?

NEET Solution View → 90

What is the term for water that does not contain soluble salts of calcium and magnesium and easily gives lather with soap?

NEET Solution View → 91

Which hydride, such as lithium hydride (LiH), is rather unreactive at moderate temperatures with oxygen (O 2 ) or chlorine (Cl 2 )?

NEET Solution View → 96

What is the purpose of passing water successively through a cation exchange resin (in the H+ form) and an anion-exchange resin (in the OH– form)?

NEET Solution View → 104

What is the chemical equation for the preparation of dihydrogen using zinc and aqueous alkali mentioned in the paragraph?

NEET Solution View → 116

Related NEET Chemistry chapters

Chemical Bonding and Molecular Structure (1,423)General Organic Chemistry (1,091)p Block Elements (Group 15, 16, 17 & 18) (1,072)Biomolecules (1,038)Coordination Compounds (891)d and f Block Elements (869)Electrochemistry (865)Chemical Kinetics (819)Structure of Atom (785)Ionic Equilibrium (764)Hydrocarbons (757)Thermodynamics (C) (730)

Hydrogen in other exams

JEE Hydrogen (107)BITSAT Hydrogen (14)

NEET Hydrogen PYQs with Solutions

About Hydrogen PYQs

Questions by year (this list)

Hydrogen questions with solutions

Which of the following statements is NOT true regarding dihydrogen?

Which of the following elements belongs to the isotope, tritium?

Which of the following mixtures is water gas?

Most common isotopes of hydrogen (non-radioactive) is

The melting point of solid substances is directly proportional to pressure acting on them. However, ice-melts at a temperature lower than its usual melting point, when the

Which of the following atomic and physical properties of hydrogen is false?

Point out the correct statement.

Number of hydrogen-bonded water molecules associated in CuSO_4 · 5 H_2 O is

Which of the following is the increasing order of enthalpy of vaporization?

Hydrogen molecule differs from chlorine molecule in the following respect:

Moist hydrogen peroxide can not be dried over conc. H_2 SO_4 because

Which of the following undergoes reduction with hydrogen peroxide in alkaline medium?

Hardness of water is due to presence of salts of :

The oxide that gives H_2 O_2 on treatment with dilute acid is

What is the bond angle in the gas phase for a water molecule?

At what temperature does the H 2 O 2 molecule have a dihedral angle of 90.2° in the solid phase?

Why is hard water unsuitable for laundry?

What is the role of dilute hydrochloric acid in the preparation of dihydrogen?

Which halogen reaction with dihydrogen requires a catalyst?

What causes the open-type structure with wide holes in ice?

What are the primary uses of hydrogen peroxide mentioned in the text?

What is the role of barium sulfate in the production of hydrogen peroxide?

What is the name of the hydrate formed by hydrogen peroxide when mixed with water?

Why is hydrogen peroxide kept away from dust?

What is the chemical formula of heavy water?

How is peroxodisulphate obtained for the laboratory preparation of hydrogen peroxide?

What are the characteristics of ionic hydrides in their solid state?

Which of the following molecules is an example of an electron-rich hydride with three lone pairs?

What is the product formed when hydrogen peroxide acts as a reducing agent in acidic medium with iodine (I 2 )?

What is the chemical formula of sodium hexametaphosphate?

What happens to the calcium and magnesium ions in hard water when they react with washing soda?

How many protons and electrons does hydrogen have in its atomic form?

What type of water association in hydrated salts involves water molecules that are coordinated with the salt ions?

What is the industrial process for manufacturing ammonia using dihydrogen and dinitrogen?

What happens to the dihedral angle of the H 2 O 2 molecule as it transitions from the gas phase to the solid phase?

What is the chemical formula of peroxodisulphate?

What role does hydrogen peroxide play in pollution control?

Which group of elements forms electron-precise compounds with dihydrogen?

What is the current source for the majority (~77%) of industrial dihydrogen production?

What is one of the primary advantages of using dihydrogen in fuel cells for generating electrical energy?

What is the primary reason for comparing the energy released by combustion of different fuels in terms of mole, mass, and volume?

How is zeolite (permutit) regenerated for further use in the ion-exchange method?

What is the term for salts that can be crystallized from aqueous solutions as hydrated salts?

In which medium does hydrogen peroxide act as an oxidizing agent with manganese (Mn)?

Which class of metals is specifically mentioned as reacting with dihydrogen to form hydrides?

How can the formation of nitrogen oxides (NO x ) be minimized during the combustion of dihydrogen?

What is one of the properties that distinguishes water from other liquids?

At what conditions does the formation of ammonia from dihydrogen and dinitrogen take place in the Haber process?

Besides dilute hydrochloric acid, what else can be used to prepare dihydrogen according to the paragraph?

What is the process called for producing 'syngas' from coal?

What is the crystalline form of water?

What is the role of hydroxide ions (OH–) in the anion exchange process?

What factor largely determines the chemical behavior of dihydrogen and other molecules?

Why is the H-H bond dissociation enthalpy of dihydrogen the highest for a single bond between two atoms?

With which group of elements does dihydrogen primarily form molecular compounds?

What is the commercial meaning of a 30% solution of hydrogen peroxide?

What percentage of the human body is composed of water?

What is the term used for metals like Pd and Pt that can absorb a significant volume of hydrogen and can be used for hydrogen storage?

How is the 1% hydrogen peroxide formed in the industrial process extracted and concentrated?

What is the significance of using high current density during the electrolytic oxidation of sulphate solutions to obtain peroxodisulphate?

Why is hydrogen peroxide stored in wax-lined glass or plastic vessels in the dark?

In what form does hydrogen primarily exist in the earth's crust and the oceans?

What is the elemental form of hydrogen?

In terms of mass for mass basis, how does the energy release of dihydrogen compare to petrol?

What is the dihedral angle?

In the manufacture of bulk organic chemicals, particularly methanol, what type of catalyst is used in the reaction of carbon monoxide (CO) with dihydrogen (H 2 )?

In the hydrated salt CuSO 4 ·5H 2 O, what does the "5H 2 O" represent?

How many isotopes of hydrogen are mentioned in the paragraph?

Why is the property of hydrogen absorption on transition metals widely used in catalytic reduction reactions?

What is the dihedral angle of the H 2 O 2 molecule in the gas phase?

How is the synthetic cation exchange resin (RSO 3 H) converted to RNa for water softening?

Which isotope of hydrogen is mentioned to be radioactive?

What is the name of the mixture of CO and H 2 produced by the reaction of steam on hydrocarbons or coke at high temperatures?

How does hydrogen's ionization enthalpy compare to that of fluorine (F)?

What type of compound does hydrogen form with elements?

Why are most hydrides formed by d-block and f-block elements almost always non-stoichiometric?