Which is a source of nascent hydrogen?
I. dil
II.
III. Electrolysis of
IV. Silent electric discharge of
Important Questions on Elements of Group 1 and Group 2
Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75kg person would gain if all atoms are replaced by atoms is:
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere.
Reason R: Hydrogen is the lightest element.
In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Physical properties of isotopes of hydrogen are different.
Reason R : Mass difference between isotopes of hydrogen is very large.
In the light of the above statements, choose the correct answer from the options given below:
Which of the following statements about hydrogen is incorrect?
The equation that represents the water-gas shift reaction is :
1) It exists as a diatomic molecule.
2) It has one electron in the outermost shell.
3) It can lose an electron to form a cation which can freely exist.
4) It cannot form ionic compounds.
