NCERT Class 9 Science-Structure of the Atom[Charged Particles in Matter] [NCERT Based General Studies (GS)]: Questions 1 - 4 of 4
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Question 1
Question MCQ▾
Protons are:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Mass of a proton is 2000 times that of an electron | |
b. | Positively charged particles present in the nucleus | |
c. | Neutral particle present in the nucleus of an atom | |
d. | Both a. and b. are correct | |
Question 2
Question MCQ▾
Canal rays are discovered by:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Goldstein | |
b. | Thomson | |
c. | Eugen Goldstein | |
d. | None of the above | |
Question 3
Question MCQ▾
Cathode rays particle was discovered by:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | E Goldstein | |
b. | J. J Thomson | |
c. | Rutherford | |
d. | Question does not provide sufficient data or is vague | |
Question 4
Question MCQ▾
Characteristics of an atom are:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | They are present in the nucleus of an atom and positively charged | |
b. | Electrons are present outside the nucleus and carry 1.602 × 10-9 coulomb of negative charge | |
c. | Relative mass of electron = amu | |
d. | Both b. and c. are correct | |