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Chemistry - Hydrogen

Practise 14 AIIMS previous year questions on Hydrogen, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Hydrogen has been asked in 8 of the 19 years of AIIMS papers analysed (2001–2019), with 14 questions in all. 57% of them were easy, 21% moderate and 21% tough. Most of its questions came from 2018, with 3 questions that year. In the last three years (2017–2019) it had 5 questions across 5 papers, about 1 per paper.

The chapter's 5 topics are not weighted equally: Preparation and Properties of Water (3 questions, 21%), Preparation and Properties of Hydrogen (3 questions, 21%), and Preparation and Properties of Hydrogen Peroxide (3 questions, 21%) have been asked the most. Preparation and Properties of Hydrogen Peroxide has produced the most tough questions (2).

  1. 1Assertion : (in acidic medium) and (in alkaline medium). Reason : is more powerful oxidant in alkaline medium.25 May, 2019Preparation and Properties of Hydrogen Peroxide
  2. 2What is the product of the reaction between dilute solution of and ?27 May, 2018Chemical properties of hydrogen peroxide
  3. 3Assertion : Saline hydrides are non-volatile, non-conducting and crystalline solids. Reason : Saline hydrides are compounds of hydrogen with27 May, 2018Hydrides
  4. 4Assertion : Oxidation state of hydrogen is +1 in while -1 in . Reason : is a metal hydride and for hydrides, hydrogen is assigned the oxidat26 May, 2018Hydrides
  5. 5can be obtained when following reacts with except with2017Chemical properties of hydrogen peroxide
  6. 6Which of the following reactions produces hydrogen?2015Preparation and Properties of Hydrogen
  7. 7Assertion : has higher boiling point than water. Reason : has stronger dipole-dipole interactions than that shown by water.2015Preparation and Properties of Hydrogen Peroxide
  8. 8Which is correct regarding acidity?2014Hydrides
  9. 9Which of the following reactions increases the production of dihydrogen from synthesis gas?2014Preparation and Properties of Hydrogen
  10. 10Assertion: Permanent hardness of water is removed by treatment with washing soda. Reason: Washing soda reacts with soluble calcium and magne2014Preparation and Properties of Water
  11. 11The reagent commonly used to determine hardness of water titrimetrically is2003Preparation and Properties of Water
  12. 12Assertion : The bond length in is shorter than that of . Reason : is an ionic compound.2003Preparation and Properties of Hydrogen Peroxide
  13. 13Which of the following reaction produces hydrogen?2002Preparation and Properties of Hydrogen
  14. 14Assertion : Water is used as a moderator in nuclear reactor. Reason : Moderator is a light substance that absorb neutrons.2001Preparation and Properties of Water

Frequently Asked Questions

1.How many questions are available for Hydrogen?

This chapter includes 14 questions compiled from AIIMS papers spanning 2001 to 2019.

2.Are these questions only from AIIMS, or from other exams too?

These are AIIMS questions specifically for the Hydrogen chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Hydrogen an important chapter for AIIMS Chemistry?

Hydrogen has appeared in 8 of the 19 years of AIIMS papers covered here, with 14 questions across 9 papers - about 2 per paper it appears in.

4.What is the difficulty level of Hydrogen questions in AIIMS?

Of the 14 questions analysed for this chapter, 57% are easy, 21% moderate and 21% tough. 2018 had the most, with 3 questions.

5.Which topics in Hydrogen should I focus on?

These topics have carried the most weightage in Hydrogen:

  • Preparation and Properties of Water - 3 questions (21%)
  • Preparation and Properties of Hydrogen - 3 questions (21%)
  • Preparation and Properties of Hydrogen Peroxide - 3 questions (21%)
  • Preparation and Properties of Hydrogen Peroxide has produced the most tough questions (2).
6.Is Hydrogen's weightage in AIIMS going up or down?

Across all 9 papers analysed, Hydrogen has averaged about 1.6 questions per paper. In the last three years (2017–2019), that average has fallen, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.