Chemistry GK Questions and Answers
Who developed the model of atomic structure?
(A) Bohr and Rutherford
(B) Volta
(C) Alfred Nobel
(D) Faraday
Correct Answer : A
The atomic weight of which element is taken as the standard?
(A) Carbon
(B) Gold
(C) Helium
(D) Oxygen
Correct Answer : A
Which of the following was not related to the principles of atomic structure?
(A) John Dalton
(B) Ernest Rutherford
(C) Niels Henry David Bohr
(D) J Chadwick
Correct Answer : D
Explanation :
The Correct Answer is J Chadwick. The atomic structure consists of protons, electrons, and neutrons. The nucleus of an atom consists of Protons and Neutrons. J Chadwick was not associated with the atomic model while the remaining three associated with the atomic model.
When a helium atom loses an electron it becomes:
(A) Negative Helium Ion
(B) Proton
(C) Alpha Particle
(D) Positive Helium Ion
Correct Answer : D
What is the number of isotopes of hydrogen?
(A) 4
(B) 2
(C) 3
(D) 1
Correct Answer : C
The mass number is the sum of the?
(A) Proton and Neutron
(B) Proton Only
(C) Electron and Proton
(D) Electron and Neutron
Correct Answer : A
Which of the following is not a donor atom?
(A) Phosphorus
(B) Antimony
(C) Arsenic
(D) Aluminum
Correct Answer : D
What happens to all the isotopes of the same element?
(A) different atomic number and different atomic mass
(B) different atomic number and same atomic mass
(C) same atomic number but different atomic mass
(D) same atomic number and same atomic mass
Correct Answer : C
What is the anti-particle of electrons?
(A) Positron
(B) Proton
(C) Alpha-Particle
(D) Beta-Patakal
Correct Answer : A
Explanation :
The positron is the antiparticle to the electron. The positron has the same rest mass (m0) as the electron but opposite charge, one positive elementary charge. In condensed matter, each positron annihilates with an electron yielding γ-rays in a very short time (10−10–10−9 s).
What is the molecular mass of gas?
(A) twice its vapor pressure
(B) equal to its vapor pressure
(C) half of its vapor pressure
(D) independent of its vapor pressure
Correct Answer : A
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