Question 1.
All isotopes of the same element have __
A. Different atomic numbers and different atomic mass
B. Different atomic numbers and the same atomic mass
C. The same atomic number but different atomic masses
D. The same atomic number and the atomic mass
Ans: C. The same atomic number but different atomic masses
Question 2.
Atoms having the same number of protons but different number of neutrons are called :
A. Isotopes
B. Cations
C. Higgs-boson
D. Anions
Ans: A. Isotopes
Question 3.
Atomic number is the number equal to
A. Protons
B. Electrons
C. Neutrons
D. None of the above
Ans: A. Protons
Question 4.
The fundamental particles present in the nucleus of an atom are
A. Electron, proton
B. Proton, neutron
C. Neutron, electron
D. Neutron, positron
Ans: B. Proton, neutron
Question 5.
Chemical properties of isotopes
A. Must be same
B. Must be different
C. Need not be same
D. Need not be different
Ans: A. Must be same
Question 6.
Rutherford’s scattering experiment proved the presence of
A. Atoms in all matter
B. Electrons in atoms
C. Neutrons in atoms
D. Nucleus in atoms
Ans: D. Nucleus in atoms
Question 7.
J.J. Thomson’s proposed model of atom is generally called __ model.
A. Cream and cake
B. Plum and pudding
C. Plum and cake
D. Cream and pudding
Ans: B. Plum and pudding
Question 8.
Which of the following does the nucleus of an atom consists of?
A. Protons and neutrons
B. Protons and electrons
C. Electrons
D. Protons
Ans: A. Protons and neutrons
Question 9.
Number of neutrons in an atom of hydrogen is
A. One
B. Zero
C. Two
D. Three
Ans: B. Zero
Question 10.
What particles move around the nucleus of an atom and are negatively charged?
A. Electrons
B. Protons
C. Positrons
D. Neutrons
Ans: A. Electrons
Question 11.
The nucleus of an atom consists of
A. Protons and Neutrons
B. Neutrons and Electrons
C. Electrons only
D. None of the above
Ans: A. Protons and Neutrons
Question 12.
The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ?
A. 6
B. 12
C. 18
D. Zero
Ans: A. 6
Question 13.
All isotopes of the same element have __
A. Different atomic numbers and different atomic mass
B. Different atomic numbers and the same atomic mass
C. The same atomic number but different atomic masses
D. The same atomic number and the atomic mass
Ans: C. The same atomic number but different atomic masses
Question 14.
The mass number of a nucleus is
A. Always less than its atomic number
B. Always more than its atomic number
C. Always equal to its atomic number
D. Sometimes more and somtimes equal to its atomic number
Ans: D. Sometimes more and somtimes equal to its atomic number
Question 15.
An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is
A. 17
B. 19
C. 36
D. 53
Ans: B. 19
Chemistry GK MCQs all set
- Chemistry GK MCQs Set-1
- Chemistry GK MCQs Set-2
- Chemistry GK MCQs Set-3
- Chemistry GK MCQs Set-4
- Chemistry GK MCQs Set-5
- Chemistry GK MCQs Set-6
- Chemistry GK MCQs Set-7
- Chemistry GK MCQs Set-8
- Chemistry GK MCQs Set-9
- Chemistry GK MCQs Set-10
- Chemistry GK MCQs Set-11
- Chemistry GK MCQs Set-12
- Chemistry GK MCQs Set-13
- Chemistry GK MCQs Set-14
- Chemistry GK MCQs Set-15
- Chemistry GK MCQs Set-16
- Chemistry GK MCQs Set-17
- Chemistry GK MCQs Set-18
- Chemistry GK MCQs Set-19
- Chemistry GK MCQs Set-20
- Chemistry GK MCQs Set-21
- Chemistry GK MCQs Set-22
- Chemistry GK MCQs Set-23
- Chemistry GK MCQs Set-24
- Chemistry GK MCQs Set-25
- Chemistry GK MCQs Set-26
- Chemistry GK MCQs Set-27
- Chemistry GK MCQs Set-28
- Chemistry GK MCQs Set-29
- Chemistry GK MCQs Set-30
- Chemistry GK MCQs Set-31
- Chemistry GK MCQs Set-32
- Chemistry GK MCQs Set-33
- Chemistry GK MCQs Set-34
- Chemistry GK MCQs Set-35
- Chemistry GK MCQs Set-36
- Chemistry GK MCQs Set-37
- Chemistry GK MCQs Set-38
- Chemistry GK MCQs Set-39
- Chemistry GK MCQs Set-40
- Chemistry GK MCQs Set-41
- Chemistry GK MCQs Set-42
- Chemistry GK MCQs Set-43
- Chemistry GK MCQs Set-44
- Chemistry GK MCQs Set-45
- Chemistry GK MCQs Set-46
- Chemistry GK MCQs Set-47
- Chemistry GK MCQs Set-48
- Chemistry GK MCQs Set-49
- Chemistry GK MCQs Set-50
- Chemistry GK MCQs Set-51
- Chemistry GK MCQs Set-52
- Chemistry GK MCQs Set-53
- Chemistry GK MCQs Set-54
- Chemistry GK MCQs Set-55
- Chemistry GK MCQs Set-56
- Chemistry GK MCQs Set-57
- Chemistry GK MCQs Set-58
- Chemistry GK MCQs Set-59
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