19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Why does H+ ion always get associated with other atoms or molecules?
Which of the following metals will react with NaOH and KOH to liberate hydrogen gas?
The process of production of syngas coal is quite common these days. The production of syngas from coal is called
Water gas is mixed with steam and the mixture is passed over heated Fe2O3 in presence of Cr2O3. The mixture when passed in water dissolves CO2 and dihydrogen left undissolved is collected. This method of preparation o…
Name the gas, which is colourless, odourless, tasteless, combustible, lighter than air and insoluble in water.
Syngas is a mixture of
Very pure hydrogen (99.9%) can be made by which of the following processes?
The production of dihydrogen obtained from coal gasification can be increased by reacting carbon monoxide of syngas mixture with steam in presence of a catalyst iron chromate. What is this process called?
Pure nascent hydrogen is best obtained by
Which of the following metals does not liberate hydrogen from acids?
The chemical reactions of dihydrogen are accomplished by
Which of the following represent laboratory preparation of dihydrogen?
Zn 2NaOH aq X H -> What is (X) in the above reaction?
The major compounds of water gas (or synthesis gas or syngas) which are used for the synthesis of methanol and a number of hydrocarbons are (a) CO H (b) CO H (c) CO N (d) CO CO H
Hydrogen is prepared by the reaction of
Hydrogen is not obtained when zinc reacts with
Which of the following is an atom of tritium? (a) (b) (c) (d)
In which of the following properties hydrogen does not show similarity with alkali metals?
In what respect electronic configuration of hydrogen and halogens are similar?
Which of the following reactions increases the production of dihydrogen from synthesis gas? (a) 1270K Ni CH g H O CO g 3H g -> (b) 1270K C g H O CO g H g -> (c) 673K catalyst CO g H O CO g H g -> (d) 12…
Which of the elements is present in plant, animal tissues, carbohydrates, proteins, hydrides including hydrocarbons and many other compounds?
Which of the following is not an isotope of hydrogen?
Which of the following explanations justifies not placing hydrogen in either the group of alkali metals or halogens?
Deuterium is
Assertion (A): Hydrogen is the first element in the periodic table. Reason (R): It has electronic configuration 1s .