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Chemistry MCQs Quiz For Entry Test
1. Which of the following was discovered first?
Mass of electron
Charge to mass ration of electrons (Answer)
Charge of electron
All of above at same time
2. Max planck proposed quantum theory is:
1900 (Answer)
1860
1800
2000
3. According to Planck energy travels is a discontinuous manner and it is composed of large number of tiny discrete units called:
Quanta (Answer)
Planta
Particles
Photons
4. The nature of positive rays depends on:
Nature of dischasrge
All of the above
Nature of resident gas (Answer)
Nature of elecrode
5. Alpha rays consists of:
Protons
Neutrons
Helium nucleus (Answer)
Hydrogen nucleus
6. X-rays have same nature as:
Gamma rays (Answer)
Cathode rays
Alpha rays
Beta rays
7. Charge to mass ratio of electron was discovered by:
J.J. Thomson (Answer)
Rutherford
Millikan
Chadwick
8. The e/m value for positive rays is maximum:
Hydrogen (Answer)
Nitrogen
Oxygen
Helium
9. Maximum potential energy that can electron can have within the atom is:
Equal to zero
Greater than zero
Infinite
Less than zero (Answer)
10. X-rays were discovered by:
Bohr
Rutherford
Schrodinger
Roentgen (Answer)
11. Which one of the following has the same number of electrons as an alpha particle?
Li+
H+ (Answer)
NH
He
12. In 1913, Mosley used the x-rays to determine:
Relative atomic mass
Avogadro's number
Atomic number (Answer)
Mass number
13. Neutron was discovered by:
Rutherford
Chadwick (Answer)
Bohr
Plank
14. X-rays are attracted towards:
None of electrode (Answer)
Anode
Any Electrode
Cathode
15. Which of the following particles has longest wavelength, if they have same speed:
Proton
Electron (Answer)
Positron
Neutron
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