Structure Of The Atoms Test

Structure Of The Atoms

This is Structure Of The Atoms Test-02 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

The main subatomic particles of nucleus are-

A
Electron & Neutron
B
Electron & Proton
C
Proton & Neutron
Correct
D
None of the above

Match the following with correct response. (1) Electron (2) Proton (3) Neutron (4) Atomic nucleus (A) E. Goldstein (B) Rutherford (C) James chadwick (D) J.J.Thomson

A
1-B, 2-D, 3-A, 4-C
B
1-D, 2-A, 3-C, 4-B
Correct
C
1-A, 2-C, 3-B, 4-D
D
1-C, 2-B, 3-D, 4-A

Match the following with correct response. (1) Canal rays consist of positively charged particles protons (2) Electrons are distributed in shells (3) Centre of an atom is dense (4) Atom is indivisible (A) Rutherford (B) J.J.Thomson (C) J. Dalton (D) Neil Bohr

A
1-C, 2-B, 3-D, 4-A
B
1-D, 2-A, 3-C, 4-B
C
1-B, 2-D, 3-A, 4-C
Correct
D
1-A, 2-C, 3-B, 4-D

Match the following with correct response. (1) Discovery of subatomic particles (2) Energy levels (3) Universal particles (4) Canal rays (A) Positively charged (B) Orbits (C) Discharge tube (D) Electrons

A
1-D, 2-A, 3-C, 4-B
B
1-B, 2-D, 3-A, 4-C
C
1-A, 2-C, 3-B, 4-D
D
1-C, 2-B, 3-D, 4-A
Correct

Match the following with correct response. (1) Valency (2) Metals (3) Non- metals (4) Noble gases (A) Combining capacity of an atom (B) Gains electron to became stable (C) Losses electron to become stable (D) They have stable configuration

A
1-A, 2-C, 3-B, 4-D
Correct
B
1-C, 2-B, 3-D, 4-A
C
1-D, 2-A, 3-C, 4-B
D
1-B, 2-D, 3-A, 4-C

Which of the following is not observed by Rutherford in \(\alpha \)-particle scattering experiment? A Most of the \(\alpha \)-particle rebound after hitting the gold foil B Some of the particles deflect by their path C Some of the particles not pass through the goil foil D Most of the particles pass straight through the gold foil

A
(a), (b) and (c) are correct
B
(a) and (c) are correct
Correct
C
(a) and (b) are correct
D
All of these

Which of the following is correct about atom? A It is the smallest unit of matter B Size of atom is very large as compared to the nucleus of the atom C In an atom number of protons is equal to number of electrons D Atoms are stable

A
(a) and (c) are correct
Correct
B
(a) and (b) are correct
C
(a), (b) and (c) are correct
D
All of these

Which statement is correct about \(\beta \)-particles- A They are actually electrons B They are deflected towards positive electrode C They travel at the speed of sound D They are deflected towards negative electrode

A
(b) and (c) are correct
B
All of these
C
(a) and (b) are correct
Correct
D
(a), (b) and (c) are correct

The electronic configuration of an element A is 2, 8, 6. How many electrons does it require to have a stable configuration?

A
6
B
8
C
2
Correct
D
0

The number of valence electrons in Cl- ion are

A
18
B
17
C
16
D
8
Correct

Which element have 7 electrons in valence shell-

A
Both (a) & (b) (Ans)
Correct
B
F
C
N
D
Cl

What is the physical state of water at\({\text{1}}{0^0}{\text{C}}\)?

A
gas
B
All of these
C
Liquid
Correct
D
Solid

Match the following with correct response. (1) Carbon(2) Sodium (3) Argon(4) Helium (A) 2,8,1(B) 2(C) 2,8,8(D) 2,4

A
1-A, 2-C, 3-B, 4-D
B
1-C, 2-B, 3-D, 4-A
C
1-D, 2-A, 3-C, 4-B
Correct
D
1-B, 2-D, 3-A, 4-C

Which of the following element have same valency? A An element with atomic number 12 B An element with atomic number 6 C An element with atomic number 4 D An element with atomic number 2

A
(a), (b) and (c) are correct
B
All of these
C
(b) and (c) are correct
D
(a) and (c) are correct
Correct

What is the actual mass of a proton?

A
None of these
B
\({\text{9}}.{\text{1 }} \times {\text{ 1}}{0^{ - {\text{19 }}}}{\text{Kg }}\)
C
\({\text{1}}.{\text{6 }} \times {\text{ 1}}{0^{ - {\text{27 }}}}{\text{Kg }}\)
Correct
D
\({\text{6}}.0{\text{23 }} \times {\text{ 1}}{0^{{\text{23 }}}}{\text{Kg }}\)