The maximum sum of the number of neutrons and protons in an isotope of hydrogen is

  • A
    $4$
  • B
    $5$
  • C
    $6$
  • D
    $3$

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Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors,which one is most important in this respect?

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Which of the following explanations is best for not placing hydrogen in either the group of alkali metals or halogens?

Which of the following is commonly used in a laboratory desiccator?

Given below are two statements:
Assertion $(A)$: Protium and deuterium differ in their rates of reactions.
Reason $(R)$: They have different enthalpies of bond dissociation.
The correct answer is:

The method for preparation of water gas is

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