Question

95.
The covalent and vander Waal's radii of hydrogen
respectively are :-
(1) 0.37 Å, 0.8 Å (2) 0.37 Å, 0.37 Å
(3) 0.8 Å, 0.8 Å (4) 0.8 Å, 0.37 Å​

Answer 1

Answer:

Option 4

Explanation:

In any element or atom the covalent radius will be less than vanderwaals radius and they both can't have equal radii.So by elimination method we can choose the second option

Answer 2

Answer:

The covalent and van der Waal's radii of hydrogen are 0.37 Å and 0.8 Å respectively.

Explanation:

The covalent radius is a measure of the size of an atom which is part of covalent bond.

• It is equal to one-half of the internuclear distance of two covalent bonded atoms in a homodiatomic molecule.
• The covalent radius of hydrogen is 0.37 Å.

The van der Waals radius is equal to half the distance between neighboring atoms in a gas

• It is the measure for the size of an atom that is not chemically bound.

• The van der Waal's radii of hydrogen is 0.8 Å.

So, the correct answer is option A.