19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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?
Deuterium is
The isotopes of hydrogen have different physical properties due to difference in mass. They have almost same chemical properties with a difference in their rates of reactions which is mainly due to
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?
Hydrogen is prepared by the reaction of
Zn 2NaOH aq X H -> What is (X) in the above reaction?
Which of the following statement is correct regarding properties of hydrogen?
Hydrogen does not possess the metallic characteristics under normal conditions because
Why does H+ ion always get associated with other atoms or molecules?
Name the gas, which is colourless, odourless, tasteless, combustible, lighter than air and insoluble in water.
The chemical reactions of dihydrogen are accomplished by
Hydrogenation of vegetable oils using nickel as a catalyst gives edible fats which is/are known as
Which of the following gas in insoluble in water?
ZnO Cu CO H ->product. Identify the product formed in the given reaction. (a) CH COOH (b) CO (c) C O (d) CH OH
Which of the following properties of hydrogen is incorrect?
Which of the following is not a property of hydrogen?
On burning hydrogen in air, the colour of flame is
Which of the following statements is correct regarding hydrogen?
Which of the following reactions of hydrogen with non- metals represents Haber‟s process ? (a) heat 2H O 2H O; H 285.9kJmol -> (b) 673K,Fe 200atm 3H N 2NH ; H 92.6kJmol -> (c) hv H Cl 2HCl -> (d) 1100 C 2H C C…
The order of reactivity of halogens towards hydrogen is
If a mole of hydrogen molecule is heated to a high temperature, then which of the following reaction take place ? (a) 2 g g g H 436kJmol H H -> (b) 2 g 2 g 2H 820kJmol 2H -> (c) 2 g 2 g g g H H 436kJmol …
Alkenes combine with carbon monoxide and hydrogen in presence of octacarbonyldicobalt as catalyst under high temperature and pressure to form