On reaction with stronger oxidizing agent like KIO4, hydrogen peroxide oxidizes with the evolution of O2. The oxidation number of I in KIO4 changes to____.
Solution and Explanation
Top Questions on Hydrogen
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The starting material for convenient preparation of deuterated hydrogen peroxide \(\left(D_2 O _2\right)\) in laboratory is :
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Questions Asked in JEE Main exam
- A rectangular loop of length 2.5 m and width 2 m is placed at 60° to a magnetic field of 4 T. The loop is removed from the field in 10 sec. The average emf induced in the loop during this time is:
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- We have three aqueous solutions of NaCl labelled as ‘A’, ‘B’ and ‘C’ with concentration 0.1 M, 0.01M & 0.001 M, respectively. The value of vant’ Haft factor (i) for these solutions will be in the order.
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- $\Delta_{vap}H^\circ$ for water is $+40.49 \, \text{kJ mol}^{-1}$ at 1 bar and $100^\circ\text{C}$. Change in internal energy for this vaporisation under same condition is .............. kJ mol$^{-1}$. (Integer answer)
(Given R = 8.3 J K$^{-1}$ mol$^{-1}$)- JEE Main - 2024
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Concepts Used:
Hydrogen
Hydrogen is the most abundant element in the universe, constituting approximately 75% of its elemental mass. It is a colorless, odorless, and tasteless gas that exists in a diatomic form (H2) at standard conditions. Hydrogen has the atomic number 1, which means it has only one proton in its nucleus, making it the simplest and lightest element.
Hydrogen has a wide range of applications, including fuel for transportation, power generation, and heating. It can be produced from various sources, such as fossil fuels, biomass, and water. The most common methods of producing hydrogen are steam methane reforming and electrolysis.
In addition to its use as a fuel, hydrogen is also used in the chemical industry to produce ammonia, methanol, and other chemicals. It is also used in the production of electronics, such as microchips, flat-screen displays, and semiconductors.
Read Also: Preparation of Hydrogen and its uses
Hydrogen has unique properties that make it a promising energy carrier for a sustainable future. When burned in air or used in a fuel cell, it produces only water, making it a clean and renewable energy source. However, the high cost of producing and storing hydrogen, as well as the lack of infrastructure, remain significant challenges to its widespread adoption. Nonetheless, ongoing research and development efforts aim to overcome these challenges and harness the potential of hydrogen as a key element in a low-carbon energy system.