1 atm of pressure is equal to all of the following except:
- 760 cm Hg
- 101325 pa
- 760 mm Hg
- 760 torr
The maximum e/m ratio for positive rays is obtained rays is obtained when the discharge tube contain:
- N2
- He
- H2
- Ne
Photon of the lowest wavelength is related to:
- Pfund series
- Bracket series
- Paschen series
- Balmer series
The number of orientation of a sub-shell for which n=4 and 1=3 will be:
- 1
- 5
- 7
- 3
117g of NaCI have
- 1.204 × 10^23 molecules of NaCl
- 6.023 × 10^23 molecules of NaCl
- 12.04 × 10^24 formula unit of NaCl
- 12.04 × 10^24 formula unit of NaCl
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