Chem-Pactice (1,2,3)

Rutherford conducted

• Alpha particle scattering experiment

• Beta particle scattering experiment

• Gamma particle scattering experiment

• Delta particle scattering experiment

Isotope means

• Same atomic number but different mass number

• Same mass number but different atomic number

• Same atomic number

• Same mass number

Quantum means

• packet of electrons

• packet of energy

• packet of protons

• packet of neutrons

The actual spectrum of hydrogen is

• continuous spectra

• line spectra

• band spectra

• discrete spectra

Balmer series contains

• n₁ = 1, n₂ = 2, 3

• n₁ = 2, n₂ = 3, 4

• n₁ = 3, n₂ = 4, 5

• n₁ = 4, n₂ = 5, 6

The statement "It is impossible

to determine simultaneously, the exact

position and exact momentum (or velocity)

of an electron"

• Schrodinger

• Heisenberg

• Pauli

• Rutherford

During ionisation from which orbital the electron will leave first

• 3d subshell

• 4s subshell

Black body is an

• Ideal absorber

• Ideal emitter

• Both ideal absorber and ideal emitter

• None of these are correct

If n = 3 and l = 1 then the orbital is

• 3s

• 3p

• 3d

• NONE OF THESE

For 4s orbital the quantum numbers are

• n = 4, l = 2, ml = +2, ms = +1/2

• n = 4, l = 0, ml = 0, ms = +1/2

• n = 4, l = 1, ml = +1, ms = +1/2

• n = 4, l = 3, ml = +2, ms = +1/2