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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

Heavy water (D2O) in a nuclear reactor serves as a_______________?
A Coolant
B Moderator
C Both A. & B.
D Neutron absorber
Correct Answer: Both A. & B.
Pick out the wrong statement?
A α-particle emission from a radioactive element makes it electrically negative
B β-particle emission from a radioactive element makes it electrically positive
C A radioactive element having a half life period of 20 years will completely disintegrated in 40 years
D The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration
Correct Answer: A radioactive element having a half life period of 20 years will completely disintegrated in 40 years
Pick out the wrong statement?
A Atoms with same number of nucleons but different number of protons are called isobars
B Atoms with same number of protons but different number of nucleons are called isoters
C Out of α, β, and γ-rays, the one having maximum penetration power are γ-rays
D The product formed by emission of α-particle has mass number less by 4 units than the parent nuclide
Correct Answer: Atoms with same number of protons but different number of nucleons are called isoters
Pick out the wrong statement?
A The nucleus of a hydrogen atom is identical with a proton
B A, β-ray particle is identical with an electron
C Mass of an electron is about 1/1800th of the lightest nucleus
D Positron is heavier than a proton
Correct Answer: Positron is heavier than a proton
Pick out the wrong statement?
A The ratio of the density of the ‘nucleus’ to that of the ‘atom’ is 1012
B α-particle is identical with a doubly charged helium ion
C The mass of deuterium atom is half that of helium atom
D Gamma rays are high energy electrons
Correct Answer: Gamma rays are high energy electrons
Pick out the correct statement?
A Positron is the antiparticle of electron
B In α-decay, the ratio of neutron to proton decreases
C Ionising power of β-rays is higher than that of α-rays
D Speed of α-rays is more than that of γ-rays
Correct Answer: Positron is the antiparticle of electron
Pick out the correct statement?
A Loss of electrons from neutral atoms produces negative ions
B The radius of nucleus & atomic size are of the order of 10-12 cm & 10-8 cm respectively
C Gain of electrons by neutral atoms form cations
D Proton to neutron ratio in a stable nucleus is 2 : 1
Correct Answer: The radius of nucleus & atomic size are of the order of 10-12 cm & 10-8 cm respectively
Pick out the wrong statement?
A The disintegration rate of a radioactive substance cannot be increased by heating it
B Electrons have negligible mass and unit negative change
C Deuterium atom has one proton and two neutrons in its nucleus
D Cadmium is capable of absorbing neutrons
Correct Answer: Deuterium atom has one proton and two neutrons in its nucleus
Which one is the radioactive isotope of hydrogen ?
A Deuterium
B Ortho-hydrogen
C Tritium
D None of these
Correct Answer: Tritium
Candu reactor is a ______________ nuclear reactor?
A Natural uranium fuelled heavy water cooled & moderated
B Highly enriched uranium (85% U-235) fuelled
C Homogeneous
D Fast breeder
Correct Answer: Natural uranium fuelled heavy water cooled & moderated
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