Question

Match column 1 column 2 and select the correct answer using the codes given below:

a- distance between the earth and stars	1- Micron
b- inter atomic distance in a solid	2- Angstrom
c- size of the nucleus	3- Light year
d- wavelength of infrared laser	4- Fermi & 5- Kilometer

p)- a-5, b-4, c-2, d-1
q)- a-3, b-2, c-4, d-1
r)- a-5, b-2, c-4, d-3
s) a-3, b-4, c-1, d-2

Answer 1

Hint: In the first column we are given some statements and in second one we are given some quantities. One thing to note is that all the options in the first column are about the distance between two quantities and in the second column all are the units of measurement.

Complete step by step answer:
a- Distance between the earth and the stars are very large and these are always measured in units of Light year, so, a-3.
b- inter atomic distance is a very small measurement and atomic radius is of the order of angstrom, so,
b-2.
The size of the nucleus is smaller than the size of the atom and it is of the order of one fermi. So, c-4.
Wavelength of the infrared is of the order of micron, so, d-1
So overall the correct option is (q).

So, the correct answer is “Option q”.

Note: Angstrom is a unit of length used to measure very small distances and mathematically it is equal to \[{{10}^{-10}}m\].It is not a SI unit of length but a smaller unit. we come across through angstrom when we are doing calculations related to Bohr atomic theory and nucleus and atoms.