CUET Level - I NEET Mock test - 2 (Chemistry)

Radioactivity was observed by

• Thomson

• Henri Becqueral

• Chadwick

• Millikan's

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2.2.1

The purpose of Millikan’s oil drop experiment was to determine the charge on __________.

• Electron

• Proton

• Neutron

• Positron

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2.2

Which of the following factors determines the extent of deflection of the electron in Millikan’s experiment?

• Charge on the electron

• Mass of the electron

• Electric and magnetic field strengths

• All of the above

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2.2

What kind of rays were used to irradiate the air between the plates?

• Gamma rays

• X - rays

• Infrared rays

• Microwave rays

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2.2

Which scientist, in addition to Millikan, devised the Oil drop experiment?

• Thomson

• Chadwick

• Harvey Fletcher

• Heisenberg

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Model paper

Who discovered electrons?

• 1. Rutherford.

• 1. J. J. Thomson

• 1. Neils Bohr.

• 1. James Chadwick.

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2.2.1

What is the formula for a mass number of an atom?

2. 
   

• 1. Number of protons + number of electrons.

• Number of neutrons + number of electrons.

• 1. Number of protons + number of neutrons.

• 1. None of these.

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2.2.3

Electrical and magnetic field are transmitted in the form of waves are called spectroscopy

• Electromagnetic waves

• Electromagnetic radiation

• Both electromagnetic waves and radiation

• Wave nature only

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2.3.1

Which of the following does not explain by Rutherford model?

• Distribution of electron

• Electrostatic attraction

• Stability of an atom

• Both stability and distribution of electron

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2.2.5

The number of waves that pass a given point in one second is called

• Wave number

• Frequency

• Spectrum

• Wave length

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2.3.1