Difficulty distribution
How the classified questions are distributed by difficulty.
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Practice Hydrogen - Inorganic Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.
Every graph below is calculated only from this selection.
Year-wise coverage for Hydrogen. Each bar uses a separate theme-derived color.
How the classified questions are distributed by difficulty.
MCQ, numerical, multiple-select and other formats found in these papers.
Top subjects by unique question coverage.
Top topics across the included previous year papers.
Top subtopics inside this exact selection.
Question coverage for the most populated papers. Every active PYP paper remains listed below.
Newest papers appear first. Sort by year, question coverage or name.
| Paper | Year / session | Questions in this view | Open |
|---|---|---|---|
| NEET 2026 | 2026 | 1 | View paper |
| NEET 2023 | 2023 | 1 | View paper |
| NEET 2022 Phase 1 | 2022 | 2 | View paper |
| NEET 2021 | 2021 | 1 | View paper |
| AIIMS 2019 | 2019 | 2 | View paper |
| NEET 2019 | 2019 | 1 | View paper |
| NEET 2016 PHASE 1 | 2016 | 1 | View paper |
| AIPMT 2010 MAINS | 2010 | 1 | View paper |
| AIPMT 2003 | 2003 | 1 | View paper |
Practice every matching question in batches of 20, with every available option.
Which of the following statements are NOT correct?
A. Hydrogen is used to reduce heavy metal oxides to metals.
B. Heavy water is used to study reaction mechanism.
C. Hydrogen is used to make saturated fats from oils
D. The \(\mathrm{H}-\mathrm{H}\) bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any element.
E. Hydrogen reduces oxides of metals that are more active than iron.
Choose the most appropriate answer from the options given below:
\(\mathrm{H}_2 \mathrm{O}_2\) is obtained by which of the following?
Yellow colour of chlorine water fades because of
The pollution due to oxides of sulphur gets enhanced due to the presence of:
(a) particulate matter (b) ozone (c) hydrocarbons (d) hydrogen peroxide
Choose the most appropriate answer from the options given below:
In the neutral or faintly alkaline medium, KMnO4 oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is form
Methane reacts with steam at 1273 K in the presence of nickel catalyst to form :