In discharge tube, proton is produced;

1. from anode
2. from cathode
3. by ionization of hydrogen gas
4. by ionization of residual gas
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Answer: C
Explanation:
• N/A
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The nature of positive rays depend upon the;

1. nature of anode
2. nature of cathode
3. nature of residual gas in discharge tube
4. all of these
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Answer: C
Explanation:
• N/A
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The charge to mass ratio (e/m) of positive rays;

1. depend opon the nature of anode used in discharge tube
2. varies with the nature of gas in discharge tube
3. remains constant
4. none of these
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Answer: B
Explanation:
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Upto 1913, Thomson and Aston concluded that atom contains;

1. electrons and protons
2. protons and neutrons
3. protons only
4. electrons, protons and neutrons
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Answer: A
Explanation:
• Because neutron was discovered later on by Chadwick in 1932
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The e/m value for positive rays is maximum for;

1. Hydrogen gas
2. Helium gas
3. nitrogen gas
4. oxygen gas
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Answer: A
Explanation:
• e/m value is greater for lighter gas, hydrogen being lighter gas generates proton with greater e/m value.
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The e/m value for proton is;

1. always greater than that of electron
2. is always smaller than than of electron
3. is equal to that of electon
4. none of these
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Answer: B
Explanation:
• since proton is heavier particle than electron
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A subatomic particle having one unit mass and one unit positive charge is called;

1. electron
2. proton
3. neutron
4. positron
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Answer: B
Explanation:
• N/A
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How many times a proton is heavier than an electron?

1. 1836
2. 1840
3. 1/1836
4. 1742
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Answer: A
Explanation:
• N/A
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In 1932, neutron was discovered by;

1. Rutherford
2. Goldstein
3. Chadwick
4. J.J Thomson
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Answer: C
Explanation:
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On which target, Chadwick bombarded alpha particles to discover neutron.

1. Cadmium
2. Beryllium
3. Boron
4. Graphite
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Answer: B
Explanation:
• N/A
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