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Atomic hydrogen is prepared by dissociation of molecular hydrogen. Therefore, it is an reaction.

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Important Questions on Hydrogen

EASY
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence

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:

EASY
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
The isotopes of hydrogen are:
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Which of the following forms of hydrogen emits low energy β- particles?
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
The most abundant elements by mass in the body of a healthy human adult are:

Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75kg person would gain if all  1H atoms are replaced by  2H atoms is:
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Which of the following statements is not true for hydrogen:
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.
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Hydrogen molecule differs from chlorine molecule in the following respect.
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Why does hydrogen occur in a diatomic form rather than in a monoatomic form under normal conditions?
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
The ortho and para hydrogen differ in respect of which of the following?
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
The most abundant element in the universe is thought to be
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Radioactive isotope of hydrogen is
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Which of the following is/are isotope of hydrogen?
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
In which of the following properties listed below, hydrogen does not show similarity with halogens ?

I. Nature of the oxide

II. Electropositive character

III. Combination with alkali metals

IV. Atomicity
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Justify the position of hydrogen in the periodic table on the basis of its electronic configuration.
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Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Which element forms maximum compound in chemistry?
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Which of the following atomic and physical properties of hydrogen is false?
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Which property among the following is the same for both hydrogen and deuterium molecules?
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is most important in this respect?
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
Write the names of isotopes of hydrogen. What is the mass ratio of these isotopes?
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Hydrogen and Its Occurence
In which of the following properties listed below, hydrogen does not show similarity with halogens?

I. Nature of the oxide

II. Electropositive character

III. Combination with alkali metals

IV. Atomicity