Question

मैच दी कॉलम का पर का​

Answer 1

Explanation:

(A) Uncertainty of an object:

According to Heisenberg's uncertainity principle:

Δx.Δp=

4π

h

Δx.Δ(mv)=

4π

h

Δx.Δv=

4πm

h

=(ii)

(B) Bohr's radius of an orbit, r

n

=

Z

5.29×n

2

=(i)

where, n=n

th

orbit, Z=atomic number

(C) Angular momentum of an electron is given by Bohr's theory as:

Thus an electron can move only in those orbits for which its angular momentum is integral multiple of

2π

h

that is why only certain fixed orbits are allowed.

mvr=

2π

nh

=(iv)

(D) According to de Broglie's equation

λ=

mv

h

=(iii)

where, λ= de-Broglie wavelength

(A)-(ii),(B)-(i),(C)-(iv),(D)-(iii)